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Home > Products > Integrated Circuits (ICs) > Interface > Specialized

Analog Devices Inc./Maxim Integrated DS8024-RRX+T&R

Name: DS8024-RRX+T&R
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS8024-RRX+T&R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS8024-RRX+T&R

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Specialized

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: DS8024-RRX+T&R.pdf

Description:: IC INTERFACE SPECIALIZED 28SOIC

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Product details

Overview

DS8024-RRX+T&R from Maxim Integrated is a smart card interface IC serving as an analog front-end for ISO 7816, EMV®, and GSM11-11 compliant readers. It delivers 5.0V ±5% (80mA max) and 3.0V ±8% (65mA max) card supply voltages, supports flexible clock division (×1/2/4/8), integrates ±8kV IEC ESD protection on card interfaces, and executes automatic activation/deactivation via internal sequencer - deployed in banking POS terminals and access control systems.

For engineers reviewing the DS8024-RRX+T&R datasheet, DS8024-RRX+T&R pinout, DS8024-RRX+T&R application, or DS8024-RRX+T&R equivalent, key selection criteria include verified 28-pin SO package compatibility, dual-voltage (3V/5V) card support with dedicated 5V/3V select pin, integrated charge-pump-based VCC generation, I/O transceiver timing (tD(IO-IOIN) = 200ns), and fault detection for short-circuit, overheating, and card removal.

Technical Context

The DS8024-RRX+T&R implements a fully autonomous smart card activation sequence triggered by CMDVCC low, initiating controlled VCC ramp-up (t2 ≈ 1.5 × T, T ≈ 25µs), CLK enable at t4, and RST assertion at t5 = tACT (160µs). Its internal charge pump operates in 1x or 2x mode depending on VDDA and selected card voltage: for 5V cards, 1x mode activates when VDDA > 5.8V; for 3V cards, 1x mode requires VDDA > 4.1V.

It features dual-presence inputs (PRES active-low and PRES active-high) with 8ms debounce, synchronous clock divider logic (CLKDIV1/CLKDIV2) ensuring glitch-free transitions between fXTAL, fXTAL/2, fXTAL/4, and fXTAL/8, and hardware-level fault response including emergency deactivation on VCC overload (>120mA threshold) or card extraction during active session.

Key Specifications

Parameter	Value and Actual Design Meaning
Digital Supply Voltage (VDD)	2.7V to 6.0V - supports wide-input host controller rail; matches typical 3.3V microcontroller I/O levels.
Card Supply Voltage (VCC)	5.0V ±5% (80mA max) or 3.0V ±8% (65mA max) - programmable via 5V/3V pin; enables single design for dual-voltage smart cards.
Clock Input Frequency	0–20MHz crystal or external clock on XTAL1/XTAL2 - provides full ISO 7816 clock range with selectable division ratios.
I/O Line Timing (tD(IO-IOIN))	200ns - ensures reliable data handshaking between host and card across C7 contact.
ESD Protection (Card Interfaces)	±8kV min per IEC 61000-4-2 - protects against electrostatic discharge during card insertion/removal in field-deployed readers.
Activation Time (tACT)	160µs - defines maximum delay from CMDVCC assertion to functional card reset and clock delivery.
Deactivation Time (tDEACT)	80µs - guarantees rapid, safe power-down of card contacts after CMDVCC high transition.

Pinout & Package

DS8024-RRX+T&R is housed in a 28-pin SO (Small Outline) package, 300-mil body width, RoHS-compliant (indicated by '+' suffix), with standard JEDEC MS-012AC outline and thermal pad omitted.

Pin/Terminal	Circuit Role	Design Meaning
1, 2	CLKDIV1, CLKDIV2	Binary-coded clock divider select inputs - configure CLK output frequency as fXTAL/1, /2, /4, or /8 without software intervention.
3	5V/3V	Voltage mode selector - logic-high enables 5V card operation; logic-low enables 3V card operation per Table 3.
4	PGND	Analog ground reference for charge pump and card voltage generator - must be isolated from digital GND to minimize noise coupling.
5, 7	CP2, CP1	Charge-pump capacitor terminals - require 100nF ceramic capacitor (ESR < 100mΩ) between them for stable VCC generation.
6	VDDA	Charge-pump supply input - must be ≥ VDD and ≥ 3.3V; determines 1x/2x charge pump mode based on card voltage selection.
8	VUP	Charge-pump output - connects to 100nF capacitor to GND; supplies regulated voltage to internal VCC generator.
9, 10	PRES, PRES	Active-low and active-high card presence inputs - support both normally-open and normally-closed mechanical switches with 8ms hardware debounce.
11	I/O	Smart card data line (C7) - bidirectional transceiver with 11kΩ internal pullup to VCC; handles ISO 7816 T=0/T=1 protocols.
12, 13	AUX2, AUX1	Auxiliary card lines (C8, C4) - identical electrical behavior to I/O; support extended smart card functionality like secure element co-processing.
14	CGND	Smart card ground return - separate from PGND/GND; must connect directly to card socket C5 to prevent ground loop-induced jitter.
15	CLK	Smart card clock output (C3) - slew rate 0.2V/ns, rise/fall time ≤8ns, duty factor 45–55%; critical for EMV Level 1 timing compliance.
16	RST	Smart card reset output (C2) - driven low during activation/deactivation; synchronized to CLK edge per ISO 7816-3 timing windows.
17	VCC	Smart card supply output (C1) - decoupled with 100nF + 220nF capacitors near DS8024 and socket respectively for low-impedance transient current delivery.
18	N.C.	No connection - pin 18 is unused and must remain unconnected per datasheet.
19	CMDVCC	Host-initiated activation trigger - active-low signal starts full hardware-controlled activation sequence including VCC ramp, CLK enable, and RST assertion.
20	RSTIN	Host-provided reset input - used optionally to synchronize RST timing with external controller; overrides internal RST only during activation window t3–t5.
21	VDD	Digital supply input - powers all host-facing logic (I/OIN, AUX1IN, AUX2IN, OFF, etc.); must match host microcontroller VDD.
22	GND	Digital ground - reference for VDD, RSTIN, CMDVCC, and all digital control pins; star-connected to avoid noise coupling into analog sections.
23	OFF	Status interrupt output - active-low open-drain signal indicating card presence (high) or fault condition (low) during active session.
24, 25	XTAL1, XTAL2	Crytal oscillator terminals - accept 0–20MHz fundamental-mode crystal; XTAL1 also accepts external clock source if crystal not used.
26	I/OIN	Host-side I/O input - level-shifted transceiver input referenced to VDD; forms master/slave arbitration with I/O pin for bidirectional communication.
27, 28	AUX1IN, AUX2IN	Host-side auxiliary inputs - functionally identical to I/OIN; enable full C4/C8/C7 protocol stack handling without external level shifters.

Key Features

Feature	Design Value
Integrated dual-voltage card supply generator	Eliminates need for external LDOs or switching regulators - delivers precise 5V/3V outputs with built-in overcurrent (120mA) and thermal shutdown.
Hardware-automated activation/deactivation sequencing	Removes firmware dependency for ISO 7816 timing compliance - executes 160µs activation and 80µs deactivation with guaranteed voltage slopes and signal synchronization.
Synchronous clock divider with glitch-free transitions	Enables dynamic clock rate changes (e.g., ATR vs. data transfer) without clock glitches or metastability - meets EMVCo timing robustness requirements.
Dual-presence detection with 8ms hardware debounce	Supports both NO and NC card socket switches in same PCB layout - eliminates need for external RC filters or MCU polling routines.
±8kV IEC 61000-4-2 ESD protection on all card-contact pins	Meets industrial reader reliability standards without external TVS diodes - reduces BOM count and board space in cost-sensitive POS terminals.

Applications

Banking POS Terminal	Access Control Reader
Use Scenario: Secure debit/credit transaction processing at retail point-of-sale using EMV-compliant chip cards. IC Role / Device Role / Timing Role: Analog front-end managing VCC supply, CLK/RST/I/O timing, and card presence detection per ISO 7816-3 and EMV Level 1 requirements. Use Value: Enables single-chip replacement of legacy NXP TDA8024 with identical 28-pin SO footprint and pin-compatible control logic, reducing redesign effort.	Use Scenario: Physical access authentication using contact-based smart cards in enterprise door entry systems. IC Role / Device Role / Timing Role: Provides galvanically isolated, ESD-hardened interface between microcontroller and card contacts (C1–C8), including C4/C8 auxiliary lines for proprietary protocols. Use Value: Delivers 8ms hardware debounce on PRES inputs to eliminate false triggers from mechanical switch bounce in high-traffic installations.
ATM Card Reader	Pay Television Conditional Access
Use Scenario: High-reliability card reading in outdoor or unattended automated teller machines exposed to temperature extremes and ESD events. IC Role / Device Role / Timing Role: Fault-tolerant smart card interface executing emergency deactivation on VCC short-circuit or card removal, signaled via OFF pin to host controller. Use Value: Integrates ±8kV IEC ESD protection and thermal shutdown (TSD = +150°C), eliminating need for discrete protection components in ruggedized enclosures.	Use Scenario: Subscriber identity module (SIM) interfacing in premium pay-TV set-top boxes requiring secure content decryption. IC Role / Device Role / Timing Role: Level-shifting transceiver for bidirectional I/O, AUX1, AUX2 lines between host SoC and conditional access module (CAM) per EN 50221. Use Value: Supports simultaneous 3V/5V card operation via 5V/3V pin - accommodates legacy and next-gen CAMs without hardware modification.

Banking POS Terminal

Access Control Reader

Use Scenario: Secure debit/credit transaction processing at retail point-of-sale using EMV-compliant chip cards.

IC Role / Device Role / Timing Role: Analog front-end managing VCC supply, CLK/RST/I/O timing, and card presence detection per ISO 7816-3 and EMV Level 1 requirements.

Use Value: Enables single-chip replacement of legacy NXP TDA8024 with identical 28-pin SO footprint and pin-compatible control logic, reducing redesign effort.

Use Scenario: Physical access authentication using contact-based smart cards in enterprise door entry systems.

IC Role / Device Role / Timing Role: Provides galvanically isolated, ESD-hardened interface between microcontroller and card contacts (C1–C8), including C4/C8 auxiliary lines for proprietary protocols.

Use Value: Delivers 8ms hardware debounce on PRES inputs to eliminate false triggers from mechanical switch bounce in high-traffic installations.

ATM Card Reader

Pay Television Conditional Access

Use Scenario: High-reliability card reading in outdoor or unattended automated teller machines exposed to temperature extremes and ESD events.

IC Role / Device Role / Timing Role: Fault-tolerant smart card interface executing emergency deactivation on VCC short-circuit or card removal, signaled via OFF pin to host controller.

Use Value: Integrates ±8kV IEC ESD protection and thermal shutdown (TSD = +150°C), eliminating need for discrete protection components in ruggedized enclosures.

Use Scenario: Subscriber identity module (SIM) interfacing in premium pay-TV set-top boxes requiring secure content decryption.

IC Role / Device Role / Timing Role: Level-shifting transceiver for bidirectional I/O, AUX1, AUX2 lines between host SoC and conditional access module (CAM) per EN 50221.

Use Value: Supports simultaneous 3V/5V card operation via 5V/3V pin - accommodates legacy and next-gen CAMs without hardware modification.

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart card interface applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
NXP TDA8024	Pin-for-pin compatible but includes PORADJ pin absent in DS8024; default reset threshold differs slightly (VTH2 = 2.45V typ vs. DS8024's 2.45V).	Legacy automotive qualification available; DS8024 lacks /V variant in SO package per Selector Guide.	Select TDA8024 only if PORADJ adjustment is required or automotive qualification is mandatory; otherwise DS8024-RRX+T&R offers identical functionality with RoHS compliance.
Maxim DS8113	Supports stop-mode low-power operation (not available in DS8024); adds 1.8V card support and lower active current (35mA vs. 135mA for DS8024-RRX+T&R).	Targeted at battery-powered or energy-constrained devices (e.g., portable PIN pads); requires minor hardware changes due to different pinout and VDDA handling.	Choose DS8113 only when sub-100μA inactive current or 1.8V card support is essential; DS8024-RRX+T&R remains optimal for mains-powered, cost-sensitive readers.

Compared with NXP TDA8024, DS8024-RRX+T&R removes PORADJ but adds RoHS compliance and identical SO packaging; compared with DS8113, it trades stop-mode power savings for pin compatibility and broader 3V/5V support without layout revision.

Availability

DS8024-RRX+T&R is available at Aetrix Electronics and suitable for banking POS terminals, physical access control systems, and automated teller machine card readers requiring stable component supply, long-term lifecycle support, and drop-in replacement capability for legacy TDA8024 designs.

Supply support for DS8024-RRX+T&R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in precision analog, mixed-signal, and high-reliability interface solutions for industrial, communications, and security applications.

The DS8024 product line was designed specifically for ISO 7816-compliant smart card readers, emphasizing hardware-automated timing compliance, integrated power generation, and robust ESD protection - targeting cost-sensitive, high-volume payment and identification systems.

FAQ

What is the package type and RoHS status of DS8024-RRX+T&R?

DS8024-RRX+T&R uses a 28-pin SO (Small Outline) package, 300-mil body width, with lead(Pb)-free and RoHS-compliant construction indicated by the '+' suffix in the part number. The package outline conforms to JEDEC MS-012AC, and land pattern number 90-0109 applies per Maxim's package documentation.

Does DS8024-RRX+T&R support both 3V and 5V smart cards, and how is voltage selection controlled?

Yes, DS8024-RRX+T&R supports both 3V and 5V smart cards. Voltage selection is controlled by the logic state of the 5V/3V pin (pin 3): logic-high selects 5V operation (5.0V ±5%, 80mA max), and logic-low selects 3V operation (3.0V ±8%, 65mA max), as defined in Table 3 of the datasheet.

What is the activation time for DS8024-RRX+T&R, and what triggers it?

The activation time (tACT) for DS8024-RRX+T&R is 160µs - measured from CMDVCC assertion (low) to full card readiness (RST and CLK active). This hardware-automated sequence includes VCC ramp-up, CLK enable at t4, and RST assertion at t5, all executed by the internal sequencer without host firmware involvement.

How does DS8024-RRX+T&R handle card presence detection and debounce?

DS8024-RRX+T&R provides dual-presence inputs (PRES active-low and PRES active-high) with integrated 8ms typical hardware debounce. When a card is inserted, OFF goes high after the debounce delay; upon extraction, it triggers automatic deactivation and pulls OFF low - eliminating need for external RC networks or MCU polling.

Is DS8024-RRX+T&R pin-compatible with NXP TDA8024, and are there any functional differences?

Yes, DS8024-RRX+T&R is a pin-for-pin drop-in replacement for NXP TDA8024 in 28-pin SO and TSSOP packages. The only functional difference is the absence of the PORADJ pin in DS8024-RRX+T&R; most applications use the device's default reset threshold (VTH2 = 2.45V typ), making the omission transparent in practice.

DS8024-RRX+T&R Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 28-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Applications:: Smart Card

Interface:: Analog

Voltage - Supply:: -

Supplier Device Package:: 28-SOIC

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

DS8024-RRX+T&R FAQ

1.How can I place an order for DS8024-RRX+T&R through Aetrix?

Please submit a Request for Quotation (RFQ) for DS8024-RRX+T&R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for DS8024-RRX+T&R reliable?

The price and inventory of DS8024-RRX+T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS8024-RRX+T&R is usually 5 days.

3.What payment methods are accepted for DS8024-RRX+T&R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS8024-RRX+T&R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS8024-RRX+T&R?

DS8024-RRX+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS8024-RRX+T&R order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for DS8024-RRX+T&R?

For technical support, including DS8024-RRX+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS8024-RRX+T&R requirements.

6.How does Aetrix verify that DS8024-RRX+T&R is sourced from the original manufacturer or authorized distributors?

All DS8024-RRX+T&R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS8024-RRX+T&R meets industry standards.

7.What is the process for return or replacement of DS8024-RRX+T&R?

All DS8024-RRX+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS8024-RRX+T&R, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The DS8024-RRX+T&R part is unused and in its original packaging.

Return procedure for DS8024-RRX+T&R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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