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NXP Semiconductors TDA8037T/C1S
- Part No.:
- TDA8037T/C1S
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TDA8037T/C1S.pdf
- Description:
- IC INTERFACE SPECIALIZED 28SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,433
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Product details
Overview
TDA8037T/C1S from NXP Semiconductors is a low-power 3 V smart card interface IC designed for ISO/IEC 7816-3 compliant contact smart card readers. It delivers regulated 3 V ±5 % VCC output (2×220 nF decoupling), thermal/short-circuit protection on all card contacts, and ESD immunity >8 kV on card pins. Its shutdown current of 250 µA enables power-efficient designs in pay-TV set-top boxes and banking card readers.
For engineers reviewing the TDA8037T/C1S datasheet, TDA8037T/C1S pinout, TDA8037T/C1S application, or TDA8037T/C1S equivalent, key selection criteria include its SO28 package compatibility with TDA8024T, integrated card presence debouncing (4.26 ms typ), synchronous CLK frequency switching (fCLKIN/fCLKIN/2), and fault-triggered automatic deactivation sequences for card removal or supply drop.
Technical Context
The TDA8037T/C1S implements an ISO 7816-3 reader interface with three protected bidirectional I/O lines (I/O, AUX1, AUX2) referenced to VCC and host-side I/OUC, AUX1UC, AUX2UC referenced to VDD - enabling independent supply domains. Its internal regulator generates stable 1.8 V (VREG) and 3 V (VCC) outputs with overload detection at ~125 mA and filtered spurious pulse tolerance up to 200 mA for milliseconds.
It features dual-mode internal oscillator (300 kHz low-power mode during shutdown; 2.5 MHz active mode), programmable voltage supervisor thresholds (internally fixed for VDD/VREG; externally adjustable via PORADJ resistor bridge), and hardware-initiated activation/deactivation sequences triggered by CMDVCCN and PRESN with precise timing control (tact = 182–554 µs, tdeact = 35–250 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Supply | 3.0–3.6 V; powers host-side logic and interfaces; supports 3.3 V nominal systems |
| Shutdown Current | 250 µA typ; enables ultra-low standby power in battery-backed or energy-sensitive readers |
| VCC Output | 3.05 V ±0.2 V (DC); regulated for ISO 7816 card compliance with 2×220 nF low-ESR ceramic decoupling |
| Card I/O Frequency | ≤1 MHz; ensures reliable data transfer over C4/C7/C8 contacts under EMI-prone conditions |
| CLK Output | Up to 10 MHz; synchronous fCLKIN/fCLKIN/2 switching via CLKDIV pin for flexible clock domain management |
| ESD Protection | >8 kV HBM on card pins (I/O, RST, VCC, AUX1, CLK, AUX2, PRESN); eliminates need for external TVS diodes |
| Ambient Temp | −25 °C to +85 °C; validated for industrial and consumer embedded environments including set-top boxes |
Pinout & Package
Package: SO28 plastic small outline package (7.5 mm body width, SOT136-1 footprint), pin-compatible with TDA8024T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKDIV | CLK frequency select input | Configures card clock as fCLKIN (logic 0) or fCLKIN/2 (logic 1); synchronous transition avoids clock glitches |
| PRESN | Card presence sense input | Active-low signal with built-in 4.26 ms debounce; eliminates mechanical switch bounce in card connectors |
| CMDVCCN | Activation command input | Active-low trigger initiating full card power-up sequence including VCC ramp, CLK enable, and RST assertion |
| RSTIN | Host reset control input | Active-high signal directly controlling card RST output; enables software-driven reset without deactivation |
| OFFN | Fault interrupt output | NMOS open-drain output (10 kΩ pull-up to VDD) signaling card removal, short-circuit, or supply drop |
| I/O, AUX1, AUX2 | Card-side bidirectional data lines | 3.3 V tolerant I/O with 10 kΩ internal pull-up to VCC; current-limited to ±15 mA per line |
| VCC | Smart card power output | Regulated 3 V output capable of 65 mA continuous / 130 mA peak; includes overload detection and thermal shutdown |
| CS | Chip select input | Enables parallel operation of multiple TDA8037T/C1S devices; places non-selected units in high-impedance state |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7816-3 Compliance | Fully implements contact smart card electrical interface requirements including VCC regulation, timing, and protocol handshaking |
| Integrated Card Presence Debounce | Hardware-based 4.26 ms filtering eliminates need for external RC networks or firmware polling delays |
| Synchronous CLK Frequency Switching | Glitch-free transition between fCLKIN and fCLKIN/2 using CLKDIV; maintains minimum pulse width integrity |
| VDDhost Supervisor Adjustment | External threshold tuning via PORADJ pin using resistor divider - enables custom reset behavior for host supply monitoring |
| Automatic Fault-Driven Deactivation | Detects card removal, VDD/VREG/VDDhost drop, or overheating and executes full emergency shutdown within 250 µs |
Applications
| Pay TV Set-Top Boxes | EMV Banking Terminals |
|---|---|
Use Scenario: Secure conditional access module (CAM) interface in satellite/cable STBs requiring tamper-resistant card handling and low standby power. IC Role / Device Role / Timing Role: Smart card reader controller managing VCC ramp, CLK generation, ATR exchange, and fault-safe deactivation during channel changes or power cycles. Use Value: 250 µA shutdown current extends battery backup life; >8 kV ESD protection ensures field reliability in consumer living-room environments. | Use Scenario: Embedded card reader in point-of-sale (POS) terminals processing EMV 4.3 payment transactions with strict timing and security requirements. IC Role / Device Role / Timing Role: ISO 7816-3 interface IC providing regulated 3 V card supply, synchronized clock, and hardware-enforced deactivation on card ejection. Use Value: Integrated thermal/short-circuit protection eliminates risk of card damage during hot-plug events; 35–250 µs deactivation time meets EMV timing constraints. |
| Government ID Readers | Secure Access Control Systems |
Use Scenario: High-assurance identity verification terminals reading national eID cards in government offices or border checkpoints. IC Role / Device Role / Timing Role: Trusted reader interface enforcing secure power sequencing, card presence validation, and tamper-responsive shutdown. Use Value: Hardware-based fault detection (VDD drop, overheating) prevents side-channel attacks; PORADJ-adjustable supervisor enables integration with custom host power rails. | Use Scenario: Physical access control panels authenticating employee smart cards at building entry points with 24/7 uptime requirements. IC Role / Device Role / Timing Role: Robust contact interface managing repeated card insertions/removals, ambient temperature variations (−25 °C to +85 °C), and long-term reliability. Use Value: SO28 package offers superior thermal performance (Rth(j-a) = 69 °C/W) vs. TSSOP16 (160 °C/W); built-in debouncing ensures consistent card detection across mechanical connector variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart card reader interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA8035T | Legacy predecessor; identical SO28 pinout but higher shutdown current (500 µA vs. 250 µA) and no CLKDIV frequency switching | Lacks synchronous clock division and enhanced ESD rating (>8 kV vs. 6 kV); suitable only where legacy design reuse is critical | Select TDA8037T/C1S for new designs requiring lower power, improved ESD, or dynamic clock scaling |
| SLB9670 | Trusted Platform Module (TPM) with integrated smart card reader controller; not pin-compatible; requires different firmware stack | Targets PC/laptop security applications with TPM 2.0 compliance; lacks standalone reader flexibility and SO28 footprint | Choose SLB9670 only when TPM functionality and cryptographic acceleration are required alongside card reading |
Compared with TDA8035T, TDA8037T/C1S reduces standby power by 50 % and adds programmable clock division; compared with SLB9670, it provides dedicated, cost-optimized ISO 7816-3 interface without TPM overhead or firmware complexity.
Availability
TDA8037T/C1S is available at Aetrix Electronics and suitable for pay TV set-top boxes, EMV banking terminals, and government ID readers requiring stable component supply, long lifecycle support, and automotive-grade reliability under industrial temperature ranges.
Supply support for TDA8037T/C1S 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
NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The TDA8037T/C1S belongs to NXP's contact smart card reader IC product line, engineered specifically for low-power, high-reliability ISO/IEC 7816-3 compliant interfaces in payment, identification, and conditional access systems.
FAQ
What is the primary function of the TDA8037T/C1S in a smart card system?
The TDA8037T/C1S serves as a dedicated ISO/IEC 7816-3 compliant contact smart card interface IC. It manages regulated 3 V card power (VCC), generates precise card clock (CLK), controls reset (RST), handles bidirectional data (I/O, AUX1, AUX2), detects card presence (PRESN), and triggers fault-safe deactivation. Its role is to offload smart card electrical protocol handling from the host microcontroller while ensuring security and reliability.
How does the TDA8037T/C1S achieve low power consumption in standby mode?
The TDA8037T/C1S achieves 250 µA typical shutdown current by disabling all card contacts, placing I/OUC/AUX1UC/AUX2UC in high-impedance state with 10 kΩ pull-ups to VDD, stopping voltage generators, and running its internal oscillator at 300 kHz low-frequency mode - all while maintaining active voltage supervision. This architecture minimizes quiescent draw without compromising fault detection readiness.
Can the TDA8037T/C1S support multiple smart cards simultaneously?
No, the TDA8037T/C1S interfaces with one smart card at a time. However, its CS (chip select) input enables parallel operation of multiple TDA8037T/C1S devices on the same host bus. When CS is low, that unit enters high-impedance mode, allowing other selected TDA8037T/C1S ICs to drive the shared host interface lines - supporting multi-slot reader designs.
What is the significance of the CLKDIV pin on the TDA8037T/C1S?
The CLKDIV pin on the TDA8037T/C1S selects the card clock frequency: logic 0 configures CLK output as fCLKIN, logic 1 configures it as fCLKIN/2. This synchronous switching avoids clock glitches during transitions and maintains pulse width integrity - critical for meeting ISO 7816 timing requirements across varying host clock sources. The feature is exclusive to the SO28 package (TDA8037T/C1S).
Does the TDA8037T/C1S require external components for basic operation?
Yes, the TDA8037T/C1S requires external decoupling capacitors: two 220 nF multilayer ceramic capacitors (low ESR <100 mΩ) on VCC, plus 10 µF and 100 nF on VDD. For VDDhost supervisor adjustment, an external resistor bridge connects to PORADJ. No external clock generator is needed if using internal oscillator, but CLKIN must be provided for full-speed operation.
TDA8037T/C1S Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Smart Card
- Interface:
- -
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 28-SO
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TDA8037T/C1S FAQ
1.How can I place an order for TDA8037T/C1S through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA8037T/C1S 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 TDA8037T/C1S reliable?
The price and inventory of TDA8037T/C1S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA8037T/C1S is usually 5 days.
3.What payment methods are accepted for TDA8037T/C1S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA8037T/C1S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA8037T/C1S?
TDA8037T/C1S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA8037T/C1S 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 TDA8037T/C1S?
For technical support, including TDA8037T/C1S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA8037T/C1S requirements.
6.How does Aetrix verify that TDA8037T/C1S is sourced from the original manufacturer or authorized distributors?
All TDA8037T/C1S 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 TDA8037T/C1S meets industry standards.
7.What is the process for return or replacement of TDA8037T/C1S?
All TDA8037T/C1S units undergo pre-shipment inspection (PSI). If there is an issue with TDA8037T/C1S, 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 TDA8037T/C1S part is unused and in its original packaging.
Return procedure for TDA8037T/C1S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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