My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS8024M-RJX+T
- Part No.:
- DS8024M-RJX+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
DS8024M-RJX+T.pdf
- Description:
- IC INTERFACE SPECIALIZED 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,820
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS8024M-RJX+T 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), and provides ±8kV IEC ESD protection on card interfaces. It is used in banking POS terminals and access control systems requiring reliable 3V/5V card power and automatic activation/deactivation sequencing.
For engineers reviewing the DS8024M-RJX+T datasheet, DS8024M-RJX+T pinout, DS8024M-RJX+T application, or DS8024M-RJX+T equivalent, key selection criteria include its dual-voltage card supply generation, integrated charge pump with VDDA ≥3.3V support, 28-pin TSSOP RoHS-compliant package, 0–10MHz CLK output range, and compatibility with NXP TDA8024 in same footprint.
Technical Context
The DS8024M-RJX+T implements a dedicated internal sequencer for automatic smart card activation and deactivation, with precise timing windows (tACT = 160μs, tDEACT = 80μs) and 8ms PRES debounce. Its charge pump operates in 1x or 2x mode depending on VDDA and selected card voltage (3V/5V), enabling single-supply operation from 3.3V to 6.0V.
It integrates three bidirectional level-shifting transceivers (I/O/I/OIN, AUX1/AUX1IN, AUX2/AUX2IN), each with 11kΩ internal pullup to VDD/VCC, 15mA current limiting, and 1MHz maximum data rate. Clock generation accepts external crystal (0–20MHz) or clock input at XTAL1, with CLKDIV1/CLKDIV2 selecting fXTAL/1, /2, /4, or /8 outputs synchronized to avoid pulse width violation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Digital Supply Voltage | VDD = 2.7V to 6.0V - supports host controller rail matching and wide-input industrial operation |
| Card Supply Voltage | 5.0V ±5% (80mA max) or 3.0V ±8% (65mA max) - meets ISO 7816 Class A/B/C voltage tolerances |
| Clock Frequency Range | 0–10MHz on CLK pin - covers full ISO 7816 asynchronous communication rates |
| ESD Protection | ±8kV (min) per IEC 61000-4-2 on card interfaces - ensures robust field reliability |
| Activation Time | tACT = 160μs - enables fast card session startup meeting EMV Level 1 timing requirements |
| Deactivation Time | tDEACT = 80μs - guarantees safe, controlled card power-down without data corruption |
| Operating Temperature | -40°C to +85°C - qualified for commercial and industrial reader environments |
Pinout & Package
DS8024M-RJX+T is housed in a 28-pin Thin Shrink Small Outline Package (TSSOP), RoHS-compliant, with 0.65mm pitch and exposed pad for thermal management. Pin 1 is located at top-left corner when notch is oriented upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | CLKDIV1, CLKDIV2 | Binary-coded clock divider select inputs - configure CLK output as fXTAL/1, /2, /4, or /8 |
| 3 | 5V/3V | Logic-controlled card voltage selector - high = 5V, low = 3V per ISO 7816 Table 3 |
| 4 | PGND | Analog ground reference for charge pump and VUP - must be separated from digital GND |
| 5, 7 | CP2, CP1 | Charge-pump capacitor terminals - require 100nF ceramic (ESR < 100mΩ) between them |
| 6 | VDDA | Charge-pump supply input - must be ≥3.3V and ≥VDD to enable 1x/2x mode switching |
| 8 | VUP | Charge-pump output - connects to 100nF capacitor to GND for stable voltage doubling |
| 9, 10 | PRES, PRES | Active-low and active-high card presence inputs - trigger 8ms debounce before OFF assertion |
| 11 | I/O | Smart card contact C7 data line - bidirectional, level-shifted, 15mA current-limited |
| 12, 13 | AUX2, AUX1 | Smart card contacts C8 and C4 - identical transceiver behavior to I/O |
| 14 | CGND | Smart card ground reference - must be routed separately from PGND/GND to avoid noise coupling |
| 15 | CLK | Smart card contact C3 clock output - synchronous, 45–55% duty cycle, 0–10MHz |
| 16 | RST | Smart card contact C2 reset output - driven by internal sequencer during activation/deactivation |
| 17 | VCC | Smart card supply voltage output - decoupled with 100nF + 220nF near socket per layout guidelines |
| 18 | N.C. | No connection - left floating; not bonded internally |
| 19 | CMDVCC | Active-low host command to initiate activation sequence - edge-triggered, monitored with OFF |
| 20 | RSTIN | Host-driven reset input - controls RST timing in alternate activation mode (Figure 4) |
| 21 | VDD | Digital supply input - powers host-interface logic and internal sequencer |
| 22 | GND | Digital ground - separate from PGND and CGND per layout best practices |
| 23 | OFF | Active-low status interrupt - signals card presence (high) or fault/emergency deactivation (low) |
| 24, 25 | XTAL1, XTAL2 | Crystal oscillator inputs - accept 0–20MHz crystal or external clock on XTAL1 only |
| 26 | I/OIN | Host-side I/O input - level-shifted to card side via transceiver; 11kΩ pullup to VDD |
| 27, 28 | AUX1IN, AUX2IN | Host-side auxiliary inputs - functionally identical to I/OIN with same pullup and timing |
Key Features
| Feature | Design Value |
|---|---|
| Analog interface with level shifting | Three independent bidirectional transceivers (I/O, AUX1, AUX2) with automatic master/slave arbitration and 1μs edge response |
| Integrated card voltage generation | Single-chip 5V/80mA or 3V/65mA supply with overload detection at ~120mA and filtered spurious pulse tolerance (≤200mA, ≤400ns) |
| Dedicated activation sequencer | Hardware-controlled 160μs activation and 80μs deactivation with precise timing windows (t3–t5) eliminating firmware timing dependencies |
| Fault detection and emergency response | Real-time monitoring of VCC short-circuit, card removal, VDD dropout, overheating (>150°C), and automatic emergency deactivation with OFF assertion |
| EMV/ISO 7816 compliance support | Built-in 8ms PRES debounce, ±8kV IEC ESD protection, and CLK duty-cycle control (45–55%) meet EMV Level 1 hardware requirements |
Applications
| Banking POS Terminals | Access Control Systems |
|---|---|
Use Scenario: Secure debit/credit transaction processing in retail point-of-sale terminals with EMV chip card insertion. IC Role / Device Role / Timing Role: Smart card analog front-end managing VCC power-up/down, CLK delivery, RST sequencing, and I/O level translation per ISO 7816-3. Use Value: Enables certified EMV Level 1 compliance with no external voltage regulators or discrete level shifters, reducing BOM count and layout complexity. | Use Scenario: Physical access credential verification using contact smart cards in door entry panels and time-attendance kiosks. IC Role / Device Role / Timing Role: Card presence detection (PRES), automatic activation upon insertion, and fault-safe deactivation on removal or timeout. Use Value: Guarantees <160μs activation and <80μs deactivation timing required for secure, responsive access control sessions. |
| Automated Teller Machines | Telecom Pay-TV Conditional Access |
Use Scenario: High-reliability card reading in outdoor ATMs subject to temperature extremes and electrical surges. IC Role / Device Role / Timing Role: Dual-voltage (3V/5V) card support, ±8kV IEC ESD protection, and thermal shutdown at +150°C. Use Value: Eliminates need for external TVS diodes and thermal sensors while maintaining operation across -40°C to +85°C ambient. | Use Scenario: Subscriber smart card interface in set-top boxes for premium content decryption and entitlement management. IC Role / Device Role / Timing Role: Isolated card power domain (VCC/CGND), low-noise CLK routing guidance, and EMI-optimized transceiver design. Use Value: Meets CISPR-22 Class B emissions limits through controlled slew rates (0.2 V/ns on CLK) and recommended 100pF C2–CGND filtering. |
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 DS8024M-RJX+T; default reset threshold used instead. | Legacy design continuity where existing TDA8024 layouts are reused without modification. | Select TDA8024 only if PORADJ adjustment is required; otherwise DS8024M-RJX+T offers identical functionality with simplified design. |
| Maxim DS8113 | Supports stop-mode low-power operation (not available in DS8024M-RJX+T); optimized for battery-powered readers. | Required for portable or energy-harvested smart card readers needing sub-500μA inactive current. | Choose DS8113 when active/stop-mode power reduction is critical; DS8024M-RJX+T remains optimal for mains-powered, cost-sensitive readers. |
Compared with NXP TDA8024 and Maxim DS8113, DS8024M-RJX+T provides identical ISO 7816/EMV interface functionality in the same 28-pin TSSOP package but omits PORADJ and stop mode-making it ideal for fixed-power, high-volume commercial readers where those features are unnecessary.
Availability
DS8024M-RJX+T is available at Aetrix Electronics and suitable for banking POS terminals, access control systems, and automated teller machines requiring stable component supply, RoHS compliance, and long-term industrial lifecycle support.
Supply support for DS8024M-RJX+T 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) designs precision analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The DS8024M-RJX+T belongs to Maxim's smart card interface product line, engineered specifically to simplify ISO 7816/EMV-compliant reader design with integrated voltage generation, sequencing, and protection-reducing external component count and layout risk.
FAQ
What is the operating temperature range for DS8024M-RJX+T?
The DS8024M-RJX+T is specified for operation from -40°C to +85°C, making it suitable for commercial and industrial smart card reader environments including outdoor ATMs and uncontrolled indoor access panels. This range is guaranteed per the Absolute Maximum Ratings and Recommended DC Operating Conditions tables in the official datasheet, and applies to both 3V and 5V card operation modes.
Does DS8024M-RJX+T support both 3V and 5V smart cards?
Yes, DS8024M-RJX+T supports both 3V and 5V smart cards via the 5V/3V pin: logic-high selects 5.0V ±5% (80mA max), logic-low selects 3.0V ±8% (65mA max). The internal charge pump automatically switches between 1x and 2x mode based on VDDA and selected voltage, enabling single-supply operation from 3.3V to 6.0V without external regulators.
Is DS8024M-RJX+T pin-compatible with NXP TDA8024?
Yes, DS8024M-RJX+T is a pin-for-pin drop-in replacement for NXP TDA8024 in 28-pin TSSOP and SO packages. The only functional difference is the absence of the PORADJ pin in DS8024M-RJX+T; most applications use the device's default reset threshold, requiring no layout or firmware changes when migrating from TDA8024.
What protection features does DS8024M-RJX+T include for smart card interfaces?
DS8024M-RJX+T includes ±8kV (minimum) IEC 61000-4-2 ESD protection on all card-facing pins (I/O, CLK, RST, VCC, CGND), short-circuit and overcurrent detection on VCC (triggers at ~120mA), thermal shutdown at +150°C, and VDD undervoltage lockout with hysteresis. These protections activate automatically during card sessions and ensure fail-safe deactivation on fault detection.
Can DS8024M-RJX+T generate the smart card clock signal internally?
No, DS8024M-RJX+T does not contain an internal crystal oscillator. It requires either an external 0–20MHz crystal connected across XTAL1/XTAL2 or an external clock signal applied to XTAL1. The CLK output frequency is derived by dividing this input using CLKDIV1/CLKDIV2 settings (fXTAL/1, /2, /4, or /8), with hardware-synchronized transitions to maintain pulse integrity.
DS8024M-RJX+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Smart Card
- Interface:
- Analog
- Voltage - Supply:
- -
- Supplier Device Package:
- 28-TSSOP
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
DS8024M-RJX+T FAQ
1.How can I place an order for DS8024M-RJX+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS8024M-RJX+T 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 DS8024M-RJX+T reliable?
The price and inventory of DS8024M-RJX+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS8024M-RJX+T is usually 5 days.
3.What payment methods are accepted for DS8024M-RJX+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS8024M-RJX+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS8024M-RJX+T?
DS8024M-RJX+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS8024M-RJX+T 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 DS8024M-RJX+T?
For technical support, including DS8024M-RJX+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS8024M-RJX+T requirements.
6.How does Aetrix verify that DS8024M-RJX+T is sourced from the original manufacturer or authorized distributors?
All DS8024M-RJX+T 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 DS8024M-RJX+T meets industry standards.
7.What is the process for return or replacement of DS8024M-RJX+T?
All DS8024M-RJX+T units undergo pre-shipment inspection (PSI). If there is an issue with DS8024M-RJX+T, 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 DS8024M-RJX+T part is unused and in its original packaging.
Return procedure for DS8024M-RJX+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS8024M-RJX+T Tags
-
NVT4857UKAZ
NXP Semiconductors
-
TCA8418RTWR
Texas Instruments
-
PCA9546APWR
Texas Instruments
-
MD0100N8-G
Microchip Technology
-
PCA9548APW,118
NXP Semiconductors
-
PCA9540BDP,118
NXP Semiconductors
-
PCA9548APWR
Texas Instruments
-
PCA9546APW,118
NXP Semiconductors
-
PTN3360DBS,518
NXP Semiconductors
-
PCA9546ABS,118
NXP Semiconductors
-
PCA9518PWR
Texas Instruments
-
PCA9545APW,118
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
