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Analog Devices Inc./Maxim Integrated DS8023-RRX+T&R
- Part No.:
- DS8023-RRX+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
DS8023-RRX+T&R.pdf
- Description:
- IC INTERFACE SPECIALIZED 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,835
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Product details
Overview
DS8023-RRX+T&R from Maxim Integrated is a smart card interface IC serving as an analog front-end between microcontrollers and ISO 7816/EMV/GSM11-11 smart cards. It supports 5V, 3V, and 1.8V card voltages with ±8kV IEC ESD protection on card pins, ultra-low stop-mode current (<10nA typ), and integrated VCC generation (5V/3V/1.8V at up to 80mA/65mA/30mA). It enables secure banking terminals and POS systems requiring robust, low-power card activation.
For engineers reviewing the DS8023-RRX+T&R datasheet, DS8023-RRX+T&R pinout, DS8023-RRX+T&R application, or DS8023-RRX+T&R equivalent, key selection criteria include its triple-voltage support (1.8V/3V/5V), automatic activation/deactivation sequencing, 28-pin SO package compatibility, and direct functional alignment with TDA8024 in legacy reader designs.
Technical Context
The DS8023-RRX+T&R implements a dedicated internal sequencer for card activation and deactivation, enforcing precise timing windows (tACT = 160μs, tDEACT = 80μs) and 8ms PRES debounce. Its charge-pump-based VCC generator operates in 1x or 2x mode depending on VDDA and selected card voltage, supporting 5V (±5%), 3V (±8%), and 1.8V (±10%) outputs with current limits of 80mA, 65mA, and 30mA respectively.
It features flexible clock generation via external crystal (0–20MHz) or oscillator input, with programmable CLK division (×1/2/4/8) controlled by CLKDIV1/CLKDIV2 pins. All I/O, AUX1, AUX2, and associated IN pins use bidirectional transceivers with 11kΩ internal pullups, 15mA current limiting, and 1MHz max data rate-fully compliant with ISO 7816 timing and electrical requirements.
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% / 3.0V ±8% / 1.8V ±10% - independently selectable; supports all ISO 7816 voltage classes. |
| Max Card Current | 80mA @ 5V, 65mA @ 3V, 30mA @ 1.8V - sufficient for full-speed EMV transaction sequences. |
| Stop-Mode Current | <10nA typical - enables battery-backed or energy-harvesting smart card readers. |
| ESD Protection | ±8kV HBM on card interface pins - meets IEC 61000-4-2 Level 4 for rugged field deployment. |
| Crystal Frequency Support | 0–20MHz - allows standard 1–20MHz crystals; CLK output duty factor 45–55%. |
| Activation/Deactivation Time | 160μs / 80μs - ensures fast card session setup and safe power-down per EMV timing constraints. |
Pinout & Package
DS8023-RRX+T&R is housed in a 28-pin SO (Small Outline) package, RoHS-compliant and lead-free (+ suffix), with 1.27mm pitch and standard JEDEC MS-012AC footprint. Pin functions are electrically identical to the TSSOP variant (DS8023-RJX+), differing only in mechanical form factor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | CLKDIV1, CLKDIV2 | Binary-select inputs for CLK frequency division (fXTAL/1, /2, /4, /8); 10ns min delay required between state changes. |
| 3 | 5V/3V | Selects 5V or 3V card supply; overridden by 1_8V pin when high; defines VCC voltage during activation. |
| 4 | PGND | Analog ground reference for charge pump and card power circuitry; separate from digital GND (pin 22). |
| 5, 7 | CP2, CP1 | Charge-pump capacitor terminals; require 100nF ceramic cap (ESR < 100mΩ) between them. |
| 6 | VDDA | Charge-pump supply input; must be ≥ VDD and ≥3.0V; determines 1x/2x mode operation for VCC generation. |
| 8 | VUP | Charge-pump output; connects to 100nF cap to GND; supplies internal regulator for VCC generation. |
| 9, 10 | PRES, PRES | Active-low and active-high card presence inputs; both trigger 8ms debounce before OFF assertion. |
| 11 | I/O | Smart card data line (C7 contact); bidirectional transceiver with 11kΩ pullup to VCC and 15mA current limit. |
| 12, 13 | AUX2, AUX1 | Auxiliary card lines (C8, C4); functionally identical to I/O with same transceiver specs and pullup. |
| 14 | CGND | Smart card ground return; must be decoupled separately from PGND/GND to minimize noise coupling. |
| 15 | CLK | Smart card clock output (C3); 0–10MHz, 45–55% duty cycle; slew rate 0.2V/ns (typ). |
| 16 | RST | Smart card reset output (C2); driven low during deactivation; supports emergency fault-triggered reset. |
| 17 | VCC | Programmable card supply output (1.8V/3V/5V); requires 2×100nF or 100nF+220nF decoupling to CGND. |
| 18 | 1_8V | High-priority 1.8V enable; overrides 5V/3V setting; high + 5V/3V high + CMDVCC high enters stop mode. |
| 19 | CMDVCC | Active-low activation trigger; initiates internal sequencer; high = inactive mode or stop mode. |
| 20 | RSTIN | Host-driven reset input; controls RST timing during activation; no effect after t5 in normal sequence. |
| 21 | VDD | Digital supply input (2.7–6.0V); powers host interface logic and internal digital blocks. |
| 22 | GND | Digital ground reference; separate from PGND and CGND to isolate noise paths. |
| 23 | OFF | Active-low status/interrupt output; indicates card presence (high) or fault/deactivation (low). |
| 24, 25 | XTAL1, XTAL2 | Crystal oscillator inputs; accept 0–20MHz crystal or external clock on XTAL1; XTAL2 grounded if using external clock. |
| 26 | I/OIN | Host-side I/O input; level-shifted to card voltage; pulled up to VDD via 11kΩ resistor when inactive. |
| 27, 28 | AUX1IN, AUX2IN | Host-side auxiliary inputs; identical behavior to I/OIN; used for C4/C8 host communication. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage smart card support | Hardware-selectable 1.8V/3V/5V VCC outputs with independent current limits (30/65/80mA) and accuracy (±10%/±8%/±5%). |
| Ultra-low-power stop mode | Sub-10nA quiescent current achieved by disabling all analog circuits while preserving PRES monitoring and OFF pin tracking. |
| Integrated card presence debounce | 8ms hardware debounce on both PRES inputs eliminates mechanical switch bounce without firmware overhead. |
| Automatic activation/deactivation sequencing | Dedicated internal sequencer enforces ISO/EMV-compliant timing (160μs activation, 80μs deactivation) without host CPU intervention. |
| Robust fault detection and response | Monitors VCC short-circuit, overtemperature (>150°C), VDD dropout, and card removal - triggers emergency deactivation and OFF assertion. |
| ISO 7816-compliant transceivers | All I/O, AUX1, AUX2 lines feature bidirectional level shifting, 15mA current limiting, 1MHz max rate, and 11kΩ internal pullups referenced to VCC/VDD. |
Applications
| Banking Payment Terminals | POS Transaction Systems |
|---|---|
Use Scenario: EMV-compliant debit/credit card processing in countertop or portable payment terminals. IC Role / Device Role / Timing Role: Smart card analog front-end managing VCC generation, CLK/RST/I/O signaling, and fault-safe deactivation per EMV Level 1 requirements. Use Value: Enables single-chip support for 1.8V/3V/5V cards with <10nA stop-mode current, reducing standby power in battery-operated devices. |
Use Scenario: Secure point-of-sale systems requiring PIN entry, card authentication, and transaction logging. IC Role / Device Role / Timing Role: Interface controller handling automatic card activation, ATR response timing, and synchronized CLK/RST/I/O handshaking. Use Value: Eliminates need for discrete level shifters, regulators, and protection components - reduces BOM count and PCB area by >40% vs. discrete solutions. |
| Access Control Readers | ATM Card Interfaces |
Use Scenario: Physical access systems using contact smart cards for employee ID, door unlocking, and audit logging. IC Role / Device Role / Timing Role: Card presence detector (PRES), sequenced power delivery (VCC), and secure data path (I/O/AUX) with ±8kV ESD protection. Use Value: Withstands repeated insertion/removal cycles and electrostatic discharge in uncontrolled environments - extends field reliability beyond 10 years. |
Use Scenario: Automated teller machines requiring high-availability, tamper-resistant smart card interfaces for cash withdrawal and balance inquiry. IC Role / Device Role / Timing Role: Fault-tolerant card controller with thermal shutdown (>150°C), VCC overload detection (120mA threshold), and emergency deactivation on card removal. Use Value: Prevents card lock-up or data corruption during unexpected card ejection - ensures deterministic recovery and session integrity. |
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-compatible 28-pin SO/TSSOP; lacks 1.8V support and stop-mode capability; PORADJ pin instead of 1_8V. | Requires external 1.8V regulator and additional low-power management circuitry for modern dual-voltage cards. | Choose TDA8024 only for legacy designs where 1.8V support and sub-10nA stop mode are not required. |
| Infineon SLE66Rxx | Integrated MCU + secure element; not a pure analog front-end; requires full firmware development and certification. | Targets high-security applications (e.g., eID, banking tokens); adds cryptographic acceleration but increases design complexity. | Select SLE66Rxx when end-to-end security (AES, RSA, TRNG) and embedded OS support are mandatory - not for basic interface replacement. |
Compared with TDA8024 and SLE66Rxx, DS8023-RRX+T&R delivers unique value in drop-in upgrade paths for 5V/3V readers needing 1.8V readiness and ultra-low-power modes, while avoiding the firmware burden of MCU-based alternatives.
Availability
DS8023-RRX+T&R is available at Aetrix Electronics and suitable for banking payment terminals, POS transaction systems, and access control readers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for DS8023-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 power management ICs for industrial, communications, and consumer applications.
The DS8023 belongs to Maxim's smart card interface product line, designed specifically to simplify ISO 7816-compliant reader development with integrated power, protection, and sequencing - eliminating discrete component count and layout complexity.
FAQ
What is the primary function of DS8023-RRX+T&R in a smart card system?
The DS8023-RRX+T&R serves as a complete analog front-end interface between a host microcontroller and ISO 7816 smart cards. It provides regulated 1.8V/3V/5V card supply (VCC), generates and conditions the CLK and RST signals, handles bidirectional I/O and AUX line level shifting, detects card presence, and executes automatic activation/deactivation sequences - all within a single 28-pin SO package.
How does DS8023-RRX+T&R support 1.8V smart cards, and what pin controls this?
DS8023-RRX+T&R supports 1.8V smart cards via the dedicated 1_8V pin (pin 18), which has priority over the 5V/3V pin. When 1_8V is driven high, the device configures its internal charge pump and regulator to deliver 1.8V ±10% at up to 30mA to the VCC pin during card activation - enabling compliance with modern low-voltage EMV cards without external components.
What is the significance of the stop-mode current specification for DS8023-RRX+T&R?
The stop-mode current of <10nA typical for DS8023-RRX+T&R enables ultra-low-power operation in battery-powered or energy-harvesting smart card readers. Stop mode is entered by holding CMDVCC, 5V/3V, and 1_8V high simultaneously while the interface is inactive - disabling all analog circuits except PRES monitoring and OFF pin tracking to minimize system standby consumption.
Can DS8023-RRX+T&R replace the NXP TDA8024 in existing designs, and what modifications are needed?
Yes, DS8023-RRX+T&R is designed as a functional upgrade to the TDA8024 with pin-for-pin compatibility in 28-pin SO/TSSOP packages. Key modifications include replacing the TDA8024's PORADJ pin connection with DS8023-RRX+T&R's 1_8V pin, adding software support for stop-mode entry/exit, and updating clock divider logic to match CLKDIV1/CLKDIV2 truth table - no PCB changes are required.
What fault conditions does DS8023-RRX+T&R monitor, and how does it respond?
DS8023-RRX+T&R monitors VCC short-circuit or overcurrent (>120mA), overtemperature (>150°C), VDD dropout below threshold, card removal during active session, and VDDA undervoltage. Upon detection, it asserts the OFF pin low and executes an emergency deactivation sequence - pulling RST low, stopping CLK, disabling I/O, and ramping down VCC - ensuring safe, standards-compliant card disconnection.
DS8023-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:
- 2.7V ~ 6V
- Supplier Device Package:
- 28-SOIC
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
DS8023-RRX+T&R FAQ
1.How can I place an order for DS8023-RRX+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS8023-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 DS8023-RRX+T&R reliable?
The price and inventory of DS8023-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 DS8023-RRX+T&R is usually 5 days.
3.What payment methods are accepted for DS8023-RRX+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS8023-RRX+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS8023-RRX+T&R?
DS8023-RRX+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS8023-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 DS8023-RRX+T&R?
For technical support, including DS8023-RRX+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS8023-RRX+T&R requirements.
6.How does Aetrix verify that DS8023-RRX+T&R is sourced from the original manufacturer or authorized distributors?
All DS8023-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 DS8023-RRX+T&R meets industry standards.
7.What is the process for return or replacement of DS8023-RRX+T&R?
All DS8023-RRX+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS8023-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 DS8023-RRX+T&R part is unused and in its original packaging.
Return procedure for DS8023-RRX+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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