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

Analog Devices Inc./Maxim Integrated DS8023-RRX+

Name: DS8023-RRX+
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS8023-RRX+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS8023-RRX+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Specialized

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

Datasheet:: DS8023-RRX+.pdf

Description:: IC INTERFACE SPECIALIZED 28SOIC

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Product details

Overview

The DS8023-RRX+ from Maxim Integrated is a smart card interface IC designed as an analog front-end for ISO 7816, EMV, and GSM11-11 compliant readers. It supports 5V, 3V, and 1.8V smart cards; delivers up to 80mA at 5V with ±8kV IEC ESD protection on card pins; and achieves ultra-low stop-mode current of <10nA (typ). It is used in banking POS terminals and access control systems requiring robust, low-power card activation.

For engineers reviewing the DS8023-RRX+ datasheet, DS8023-RRX+ pinout, DS8023-RRX+ application, or DS8023-RRX+ equivalent, key selection criteria include its triple-voltage card supply generation (5V/3V/1.8V), integrated charge pump, automatic activation/deactivation sequencer, and compatibility with TDA8024-based designs.

Technical Context

The DS8023-RRX+ integrates a voltage supervisor, charge-pump-based VCC generator, flexible clock divider (×1/2/4/8), and I/O transceivers with active pullup. Its internal sequencer autonomously manages card activation (tACT = 160μs) and deactivation (tDEACT = 80μs) based on CMDVCC, RSTIN, and PRES signals.

It operates from a single 2.7V–6.0V VDD supply while using VDDA ≥ VDD (min 3.0V) to drive the charge pump. The device supports crystal or external clock inputs up to 20MHz and guarantees ISO 7816-compliant CLK timing (0–10MHz, 45–55% duty cycle) and I/O slew rate (0.2V/ns).

Key Specifications

Parameter	Value and Actual Design Meaning
Digital Supply Voltage	VDD = 2.7V to 6.0V - powers host-side logic and interfaces; must match host MCU supply.
Card Supply Outputs	5.0V ±5% / 80mA max, 3.0V ±8% / 65mA max, 1.8V ±10% / 30mA max - programmable via 1_8V and 5V/3V pins.
Stop-Mode Current	<10nA (typ) - entered by holding CMDVCC, 5V/3V, and 1_8V high; enables battery-backed standby.
ESD Protection	±8kV (min) per IEC 61000-4-2 on card interface pins - protects against user-handling surges.
Clock Frequency Range	0–10MHz on CLK pin - selectable via CLKDIV1/CLKDIV2 from XTAL1/XTAL2 (0–20MHz crystal or external clock).
I/O Line Max Frequency	1MHz - supports ISO 7816 T=0/T=1 protocols with controlled rise/fall times (0.1μs).
Activation Time	tACT = 160μs - time from CMDVCC low to full VCC ramp and CLK enable; ensures reliable ATR capture.

Pinout & Package

DS8023-RRX+ is housed in a 28-pin SO (Small Outline) package, RoHS-compliant and lead-free (+ suffix). Pin pitch is 1.27mm; body dimensions are 17.9mm × 7.5mm × 2.65mm (max height).

Pin/Terminal	Circuit Role	Design Meaning
1, 2 CLKDIV1, CLKDIV2	Clock divider select inputs	Set CLK output frequency as fXTAL/1, /2, /4, or /8 - must be changed sequentially with ≥10ns delay.
3 5V/3V	Card voltage mode select	Logic-high = 5V card; logic-low = 3V card - overridden by 1_8V pin when asserted.
4 PGND	Analog ground reference	Separate ground for charge-pump circuitry; must be connected to system analog ground plane.
5, 7 CP2, CP1	Charge-pump capacitor terminals	Connect 100nF ceramic capacitor (ESR < 100mΩ) between CP1 and CP2 to enable voltage doubling.
6 VDDA	Charge-pump supply input	Must be ≥ VDD and ≥3.0V; supplies internal regulator generating VCC for smart card contacts.
8 VUP	Charge-pump output	Connect 100nF capacitor to GND; provides boosted voltage for internal regulation stages.
9, 10 PRES, PRES	Active-low / active-high card presence inputs	Debounced (8ms typ); triggers OFF assertion and initiates activation/deactivation sequences.
11 I/O	Smart card data line (C7)	Level-shifted bidirectional I/O; includes 11kΩ internal pullup to VCC and 15mA current limiting.
12, 13 AUX2, AUX1	Auxiliary card lines (C8, C4)	Functionally identical to I/O; support extended ISO 7816 auxiliary communication paths.
14 CGND	Smart card ground reference	Direct connection to card contact C5; must be routed separately from digital/analog grounds.
15 CLK	Smart card clock output (C3)	ISO-compliant 0–10MHz clock with 45–55% duty cycle; slew rate 0.2V/ns (min).
16 RST	Smart card reset output (C2)	Driven low during activation/deactivation; copies RSTIN after t5; supports emergency deactivation on fault.
17 VCC	Smart card supply voltage output	Delivers regulated 5V/3V/1.8V to contact C1; decoupled with 100nF + 220nF capacitors to CGND.
18 1_8V	1.8V card selection enable	Active-high override for 1.8V operation; takes precedence over 5V/3V pin; entry condition for stop mode.
19 CMDVCC	Activation sequence trigger	Active-low input from host; initiates full power-up sequence when pulled low during card presence.
20 RSTIN	Host reset input	Controls RST timing during activation; must be toggled between t3 and t5 to start CLK if external clock not used.
21 VDD	Digital supply input	Main supply for host-side logic; must match host MCU VDD; powers all VDD-referenced pins (I/OIN, OFF, etc.).
22 GND	Digital ground	Reference for VDD, control pins, and digital I/O; separate from PGND and CGND for noise isolation.
23 OFF	Status interrupt output	Active-low open-drain output with 20kΩ internal pullup to VDD; signals card presence, faults, or stop-mode status.
24, 25 XTAL1, XTAL2	Crystal/clock input	Accepts 0–20MHz crystal (across both) or external clock (XTAL1 only); XTAL2 floats if external clock used.
26 I/OIN	Host-to-IC data input	Level-shifted input from host MCU; forms transceiver pair with I/O; 11kΩ pullup to VDD.
27, 28 AUX1IN, AUX2IN	Host-to-IC auxiliary inputs	Functionally identical to I/OIN; paired with AUX1/AUX2 for C4/C8 communication.

Key Features

Feature	Design Value
Triple-voltage card supply generation	Internally generates precise 5V/3V/1.8V outputs with tight tolerances (±5% to ±10%) and current limits (80/65/30mA), eliminating external LDOs.
Auto-sequenced activation/deactivation	Hardware-controlled 160μs activation and 80μs deactivation with synchronized VCC ramp, CLK enable, and RST assertion - no firmware timing overhead.
Ultra-low-power stop mode	Consumes <10nA (typ) by disabling all analog blocks while preserving card presence monitoring via OFF/PRES linkage.
Integrated ESD and fault protection	±8kV IEC ESD on card pins plus short-circuit, overcurrent, overtemperature, and VDD dropout detection with automatic emergency deactivation.
Flexible clock architecture	Supports crystal (0–20MHz) or external clock input with programmable division (×1/2/4/8) and guaranteed ISO 7816 timing compliance on CLK output.

Applications

Banking POS Terminal	Access Control Reader
Use Scenario: Embedded in countertop or portable payment terminals processing debit/credit card transactions per EMV Level 1 requirements. IC Role / Device Role / Timing Role: Provides ISO 7816-compliant analog interface between ARM Cortex-M host and contact smart card; manages VCC sequencing, CLK generation, and RST timing for ATR exchange. Use Value: Enables certified EMV transaction flow with built-in 5V/3V/1.8V support and ±8kV ESD protection - eliminates external level shifters and discrete protection diodes.	Use Scenario: Integrated into door lock controllers or biometric access panels verifying employee ID cards in enterprise or industrial facilities. IC Role / Device Role / Timing Role: Acts as smart card front-end handling card insertion detection (PRES debounce), activation, and secure data exchange over I/O/C4/C8 lines. Use Value: Reduces BOM count with integrated charge pump, sequencer, and fault recovery - improves reliability during repeated card insertions/removals.
ATM Card Interface	Telecom Smart Card Module
Use Scenario: Used in automated teller machines to interface with EMV-compliant bank cards during cash withdrawal or balance inquiry sessions. IC Role / Device Role / Timing Role: Delivers regulated 5V/3V card supply, controls CLK/RST/I/O timing per ISO 7816-3, and monitors for card removal or short-circuit faults. Use Value: Guarantees fail-safe deactivation (tDEACT = 80μs) and emergency shutdown on fault - prevents card damage or data corruption during power loss.	Use Scenario: Embedded in pay-TV set-top boxes or telecom gateways supporting SIM/UICC-based authentication and service provisioning. IC Role / Device Role / Timing Role: Interfaces with 1.8V/3V UICC cards via C1–C8 contacts; uses 1_8V pin override and low-noise CLK routing to meet GSM11-11 timing margins. Use Value: Supports dual-voltage UICC operation without external voltage translators; 1MHz I/O bandwidth meets GSM11-11 data rate requirements.

Banking POS Terminal

Access Control Reader

Use Scenario: Embedded in countertop or portable payment terminals processing debit/credit card transactions per EMV Level 1 requirements.

IC Role / Device Role / Timing Role: Provides ISO 7816-compliant analog interface between ARM Cortex-M host and contact smart card; manages VCC sequencing, CLK generation, and RST timing for ATR exchange.

Use Value: Enables certified EMV transaction flow with built-in 5V/3V/1.8V support and ±8kV ESD protection - eliminates external level shifters and discrete protection diodes.

Use Scenario: Integrated into door lock controllers or biometric access panels verifying employee ID cards in enterprise or industrial facilities.

IC Role / Device Role / Timing Role: Acts as smart card front-end handling card insertion detection (PRES debounce), activation, and secure data exchange over I/O/C4/C8 lines.

Use Value: Reduces BOM count with integrated charge pump, sequencer, and fault recovery - improves reliability during repeated card insertions/removals.

ATM Card Interface

Telecom Smart Card Module

Use Scenario: Used in automated teller machines to interface with EMV-compliant bank cards during cash withdrawal or balance inquiry sessions.

IC Role / Device Role / Timing Role: Delivers regulated 5V/3V card supply, controls CLK/RST/I/O timing per ISO 7816-3, and monitors for card removal or short-circuit faults.

Use Value: Guarantees fail-safe deactivation (tDEACT = 80μs) and emergency shutdown on fault - prevents card damage or data corruption during power loss.

Use Scenario: Embedded in pay-TV set-top boxes or telecom gateways supporting SIM/UICC-based authentication and service provisioning.

IC Role / Device Role / Timing Role: Interfaces with 1.8V/3V UICC cards via C1–C8 contacts; uses 1_8V pin override and low-noise CLK routing to meet GSM11-11 timing margins.

Use Value: Supports dual-voltage UICC operation without external voltage translators; 1MHz I/O bandwidth meets GSM11-11 data rate requirements.

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	No 1.8V support; lacks stop-mode; PORADJ pin instead of 1_8V; same 28-pin SO/TSSOP footprint.	Requires external 1.8V LDO and additional firmware for low-power states; limited to 5V/3V cards only.	Select DS8023-RRX+ for 1.8V UICC, ultra-low-power standby, or drop-in upgrade where software adds stop-mode control.
Infineon SLE66Rxx	Integrated MCU core; higher integration but larger QFN package; different pinout and register map.	Used in fully embedded secure modules; requires complete firmware redesign and PCB layout change.	Select DS8023-RRX+ when retaining existing host MCU architecture and needing only analog front-end replacement.

Compared with NXP TDA8024 and Infineon SLE66Rxx, the DS8023-RRX+ uniquely combines triple-voltage support, hardware-automated sequencing, and sub-10nA stop mode in a pin-compatible SO package - enabling direct upgrade paths without layout changes while extending battery life in portable readers.

Availability

DS8023-RRX+ is available at Aetrix Electronics and suitable for banking POS terminals, access control systems, and ATM card interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for DS8023-RRX+ 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 power management ICs for industrial, communications, and consumer applications.

The DS8023-RRX+ belongs to Maxim's smart card interface product line, engineered specifically for ISO 7816/EMV/GSM11-11 reader designs requiring integrated power, protection, and protocol-level timing control.

FAQ

What is the primary function of the DS8023-RRX+ in a smart card reader system?

The DS8023-RRX+ serves as the analog front-end interface between a host microcontroller and ISO 7816-compliant smart cards. It generates regulated 5V/3V/1.8V card supply voltages, provides level-shifted I/O, CLK, and RST signals, implements ESD protection, and executes autonomous activation/deactivation sequences - all within the DS8023-RRX+ IC.

How does the DS8023-RRX+ achieve ultra-low power consumption in stop mode?

The DS8023-RRX+ enters stop mode when CMDVCC, 5V/3V, and 1_8V pins are all held high, disabling all internal analog circuits including the charge pump, oscillator, and voltage generators. This reduces quiescent current to less than 10nA (typical), while preserving card presence monitoring via the OFF pin's linkage to PRES.

Can the DS8023-RRX+ replace the NXP TDA8024 without hardware modifications?

Yes, the DS8023-RRX+ is pin-compatible with the TDA8024 in the 28-pin SO package and shares identical pin functions for all common signals. However, the DS8023-RRX+ replaces the TDA8024's PORADJ pin with 1_8V, enabling 1.8V support and stop mode - requiring only minor firmware updates to leverage these new features.

What are the key timing parameters governing smart card activation with the DS8023-RRX+?

The DS8023-RRX+ guarantees activation time tACT = 160μs from CMDVCC low to full VCC ramp and CLK enable, and deactivation time tDEACT = 80μs. These values are hardware-sequenced and independent of host MCU timing, ensuring repeatable ISO 7816-compliant ATR capture and safe card power-down.

Does the DS8023-RRX+ support external clock sources, and what are the requirements?

Yes, the DS8023-RRX+ accepts external clock inputs up to 20MHz on XTAL1 (with XTAL2 left floating). The input must have a 48–52% duty cycle and transition time <5% of the period to maintain 45–55% CLK output duty cycle. Crystal operation (across XTAL1/XTAL2) is also supported up to 20MHz.

DS8023-RRX+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

Applications:: Smart Card

Interface:: Analog

Voltage - Supply:: 2.7V ~ 6V

Supplier Device Package:: 28-SOIC

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

DS8023-RRX+ FAQ

1.How can I place an order for DS8023-RRX+ through Aetrix?

Please submit a Request for Quotation (RFQ) for DS8023-RRX+ 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 DS8023-RRX+ reliable?

The price and inventory of DS8023-RRX+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS8023-RRX+ is usually 5 days.

3.What payment methods are accepted for DS8023-RRX+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS8023-RRX+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS8023-RRX+?

DS8023-RRX+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS8023-RRX+ 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 DS8023-RRX+?

For technical support, including DS8023-RRX+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS8023-RRX+ requirements.

6.How does Aetrix verify that DS8023-RRX+ is sourced from the original manufacturer or authorized distributors?

All DS8023-RRX+ 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 DS8023-RRX+ meets industry standards.

7.What is the process for return or replacement of DS8023-RRX+?

All DS8023-RRX+ units undergo pre-shipment inspection (PSI). If there is an issue with DS8023-RRX+, 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 DS8023-RRX+ part is unused and in its original packaging.

Return procedure for DS8023-RRX+:

1.Submit a request within 90 days.

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

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