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NXP Semiconductors TDA8037T/C1J
- Part No.:
- TDA8037T/C1J
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TDA8037T/C1J.pdf
- Description:
- IC INTERFACE SPECIALIZED 28SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,987
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Product details
Overview
TDA8037T/C1J from NXP Semiconductors is a low-power 3 V smart card interface IC designed for ISO 7816-compliant contact smart card readers. It delivers VCC regulation (3 V ±5 %), thermal/short-circuit protection on all card contacts, ESD protection >8 kV on card pins, and automatic activation/deactivation sequences. It serves as the core interface controller in banking-grade IC card readers requiring secure, power-efficient card power management and fault-resilient operation.
For engineers reviewing the TDA8037T/C1J datasheet, TDA8037T/C1J pinout, TDA8037T/C1J application, or TDA8037T/C1J equivalent, key selection criteria include its SO28 package compatibility with TDA8024T, 65 mA continuous VCC drive capability, 250 µA shutdown current, integrated card presence debouncing (4.26 ms typ.), and support for 20 MHz external clock input with synchronous CLKDIV-controlled frequency division.
Technical Context
The TDA8037T/C1J implements an ISO 7816-3 compliant smart card reader interface with dual-voltage domain operation: VDD (3.0–3.6 V) for host-side logic and VCC (2.85–3.15 V) for card-side power. Its internal architecture includes a digitally controlled VCC regulator with overload detection (~125 mA), a dual-frequency internal oscillator (300 kHz inactive / 2.5 MHz active), and a hardware sequencer that executes precise activation/deactivation timing (tact = 256 µs typ., tdeact = 90 µs typ.).
It features three protected bidirectional I/O lines (I/O, AUX1, AUX2) referenced to VCC with 10 kΩ pull-up resistors, host-side I/OUC/AUX1UC/AUX2UC referenced to VDD, and NMOS open-drain OFFN interrupt output with 10 kΩ internal pull-up. The SO28 variant supports chip select (CS), external PORADJ threshold adjustment, and CLKDIV-controlled clock division (fCLKIN or fCLKIN/2), enabling parallel multi-IC reader designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Supply Range | 3.0 V to 3.6 V - powers host-side logic and interfaces; stable operation across industrial temperature range (−25 °C to +85 °C) |
| VCC Output Accuracy | 3.05 V ±0.2 V (2.85–3.15 V) - regulated card supply meeting EMV 4.3 and ISO 7816 voltage tolerance requirements |
| Shutdown Current | 250 µA typ. - enables ultra-low-power standby in battery-powered or energy-sensitive readers |
| VCC Continuous Drive | 65 mA - sufficient for full-speed T=0/T=1 protocols and dual-interface cards without external boost |
| Card-Side ESD Protection | >8 kV HBM on I/O, RST, VCC, AUX1, CLK, AUX2, PRESN - exceeds IEC 61000-4-2 Level 4 for robust field deployment |
| Activation Time | 256 µs typ. - ensures fast card session start while maintaining ISO 7816 timing compliance for ATR generation |
| Deactivation Time | 90 µs typ. - guarantees rapid, safe card power removal during hot extraction or fault events |
| External Clock Input | 1 MHz to 20 MHz - supports high-speed card communication and dynamic CLKDIV-based frequency switching |
Pinout & Package
Package: SO28 - plastic small outline package, 28 leads, 7.5 mm body width (SOT136-1), footprint compatible with TDA8024T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CLKDIV | CLK frequency control input | Selects card clock as fCLKIN or fCLKIN/2; synchronous switching prevents pulse distortion during protocol transitions |
| 6 VDD | Host-side supply input | Powers internal logic, host I/O buffers (I/OUC, AUX1UC, AUX2UC), and voltage supervisor circuitry |
| 9 PRESN | Card presence sense input | Active-low signal with built-in 4.26 ms debounce; eliminates mechanical switch bounce in rugged card connectors |
| 11 I/O | Card data I/O (C7) | Bidirectional line referenced to VCC; 10 kΩ internal pull-up; 15 mA current limit protects against short circuits |
| 12 AUX2 | Card auxiliary I/O (C8) | Second protected bidirectional line for extended ISO 7816-3 protocols or proprietary card features |
| 13 AUX1 | Card auxiliary I/O (C4) | Third protected bidirectional line supporting multi-contact or dual-interface smart cards |
| 14 GND | Ground reference | Common return path for VDD, VCC, and all analog/digital circuitry; decoupling critical for EMI suppression |
| 15 CLK | Card clock output (C3) | CMOS-level clock up to 10 MHz; 70 mA current limit ensures reliable driving of capacitive card loads |
| 16 RST | Card reset output (C2) | Active-high reset with 20 mA current limit; synchronized to activation sequence for ISO-compliant ATR timing |
| 17 VCC | Regulated card supply output (C1) | 3 V ±5 % output; requires two 220 nF low-ESR MLCCs; overload detection at ~125 mA prevents thermal damage |
| 19 CMDVCCN | Activation command input | Active-low trigger initiating full hardware-controlled activation sequence including VCC ramp, CLK enable, and RST assertion |
| 20 RSTIN | Host reset input | Active-high signal allowing host microcontroller to directly assert card reset independent of activation state |
| 23 OFFN | Fault interrupt output | Open-drain NMOS output with 10 kΩ internal pull-up; goes low on card removal, overcurrent, overheating, or supply drop |
| 24 CLKIN | External clock input | Accepts 1–20 MHz square wave; internal conditioning ensures jitter-free CLK generation for high-reliability transactions |
| 26 I/OUC | Host data I/O line | Host-side bidirectional interface referenced to VDD; 10 kΩ internal pull-up enables level-shifted communication with VCC ≠ VDD systems |
| 21 CS | Chip select input | Enables parallel operation of multiple TDA8037T devices; latches control inputs when low, places I/OUC in high-Z mode |
| 18 PORADJ | VDDhost supervisor threshold adjust | Allows external resistor bridge to set custom reset threshold for VDDhost supply monitoring in multi-rail systems |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7816-3 & EMV 4.3 Compliance | Hardware-enforced activation/deactivation timing, VCC regulation, and fault handling meet banking-grade certification requirements |
| Integrated Card Presence Debounce | 4.26 ms fixed hardware debounce on PRESN eliminates need for external RC networks or firmware polling delays |
| VCC Overload Detection with Filtering | Detects ~125 mA faults but tolerates 200 mA spurious pulses for milliseconds-prevents false deactivation during card startup transients |
| Three Protected Card I/O Lines | I/O, AUX1, AUX2 each feature thermal shutdown, short-circuit protection, and 15 mA current limiting-enables robust multi-protocol support |
| SO28 Footprint Compatibility | Pin-for-pin compatible with TDA8024T-allows drop-in upgrade path for existing reader designs without PCB rework |
| Low-Power Shutdown Mode | 250 µA typical quiescent current with all card contacts inactive-extends battery life in portable payment terminals |
Applications
| Banking IC Card Readers | EMV Payment Terminals |
|---|---|
Use Scenario: Desktop and portable point-of-sale terminals reading debit/credit cards with T=0 or T=1 protocols. IC Role / Device Role / Timing Role: Primary smart card interface controller managing VCC power sequencing, CLK/RST timing, and I/O signal integrity per ISO 7816-3. Use Value: 65 mA VCC drive and 20 MHz clock support enable full-speed EMV transaction processing without external regulators or clock buffers. | Use Scenario: Secure payment kiosks and unattended terminals requiring certified, tamper-resistant card interfaces. IC Role / Device Role / Timing Role: Security-critical interface IC providing ESD-hardened card connections, hardware fault detection, and automatic emergency deactivation on card removal. Use Value: >8 kV HBM ESD rating and real-time short-circuit/overheat detection ensure reliability in high-traffic retail environments. |
| Pay TV Conditional Access Modules | Government ID Smart Card Readers |
Use Scenario: Set-top box CAMs validating subscriber entitlements via encrypted smart cards. IC Role / Device Role / Timing Role: Low-power card interface enabling always-on readiness with <250 µA shutdown current and fast 256 µs activation. Use Value: Ultra-low standby consumption extends module lifetime in consumer electronics with constrained thermal budgets. | Use Scenario: Border control, e-passport, and national ID verification stations requiring FIPS/CC-certified card access. IC Role / Device Role / Timing Role: Trusted interface IC delivering auditable fault logging via OFFN interrupt and deterministic deactivation sequences. Use Value: Hardware-enforced activation timing and integrated PRESN debounce eliminate timing-related certification failures during interoperability testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart card interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA8035T | Legacy predecessor; higher shutdown current (500 µA vs. 250 µA), no CLKDIV or CS support, TSSOP16-only packaging | Lacks SO28 footprint compatibility and parallel operation capability; not suitable for new designs targeting EMV 4.3 or multi-IC readers | Select TDA8037T/C1J for lower power, enhanced features, and backward-compatible upgrade paths |
| SLB9670 | Trusted Platform Module (TPM) with integrated smart card controller; requires external VCC regulation and lacks native ISO 7816-3 timing engine | Designed for PC platform security-not optimized for standalone card readers; adds cryptographic overhead and complexity | Choose TDA8037T/C1J for dedicated, cost-optimized, standards-compliant smart card interface without firmware dependencies |
Compared with TDA8035T and SLB9670, the TDA8037T/C1J uniquely combines SO28 footprint compatibility, 250 µA shutdown current, integrated CLKDIV/CS, and hardware-enforced ISO 7816-3 timing-making it the optimal choice for next-generation banking, payment, and ID readers requiring both compliance and power efficiency.
Availability
TDA8037T/C1J is available at Aetrix Electronics and suitable for banking IC card readers, EMV payment terminals, Pay TV conditional access modules, and government ID smart card readers requiring stable component supply, long-term lifecycle support, and ISO/EMV-certified performance.
Supply support for TDA8037T/C1J 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 identification markets.
The TDA8037T/C1J belongs to NXP's contact smart card reader IC product line, engineered specifically for high-reliability, low-power, and standards-compliant financial and identity applications requiring EMV 4.3 and ISO 7816 certification.
FAQ
What is the primary function of the TDA8037T/C1J in a smart card system?
The TDA8037T/C1J serves as a dedicated ISO 7816-3 compliant smart card interface controller. It manages regulated 3 V card power (VCC), generates precise CLK and RST signals, handles bidirectional I/O communication (I/O, AUX1, AUX2), detects card insertion/removal via PRESN, and triggers automatic activation/deactivation sequences-all while enforcing thermal, short-circuit, and ESD protection. Its role is to offload timing-critical card interface tasks from the host microcontroller.
Does the TDA8037T/C1J support both T=0 and T=1 smart card protocols?
Yes, the TDA8037T/C1J supports both T=0 and T=1 protocols through its three protected bidirectional I/O lines (I/O, AUX1, AUX2) and precise timing control. Its hardware-enforced activation sequence (256 µs typ.), programmable CLK output (up to 10 MHz), and 65 mA VCC drive meet the electrical and timing requirements defined in ISO/IEC 7816-3 for both protocols, enabling seamless interoperability with banking, ID, and pay-TV cards.
How does the TDA8037T/C1J handle card removal during an active transaction?
When card removal is detected via PRESN, the TDA8037T/C1J immediately initiates an emergency deactivation sequence: RST is pulled low within 3T/64, CLK stops, I/O lines are driven low, and VCC ramps down to zero within 250 µs. OFFN asserts low to notify the host, and all card contacts become low-impedance to GND. This hardware-automated response ensures safe, standards-compliant termination without host intervention.
What is the significance of the CLKDIV pin on the TDA8037T/C1J?
The CLKDIV pin on the TDA8037T/C1J selects the card clock frequency as either fCLKIN or fCLKIN/2. This synchronous frequency change-effective for only 10 CLKIN periods after assertion-ensures no pulse falls below 45 % duty cycle during transitions. It allows dynamic clock scaling for different card types or operational modes while maintaining strict ISO 7816-3 timing compliance, and is exclusive to the SO28 package (TDA8037T/C1J).
Can the TDA8037T/C1J be used in battery-powered portable readers?
Yes, the TDA8037T/C1J is explicitly designed for portable applications: its 250 µA typical shutdown current minimizes battery drain during idle periods, and its 3 V operation aligns with common Li-ion/Li-poly battery voltages. Combined with integrated PRESN debouncing and automatic activation, it eliminates external components and firmware overhead-reducing BOM cost and power management complexity in handheld payment or ID verification devices.
TDA8037T/C1J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Smart Card
- Interface:
- -
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 28-SO
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TDA8037T/C1J FAQ
1.How can I place an order for TDA8037T/C1J through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA8037T/C1J 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/C1J reliable?
The price and inventory of TDA8037T/C1J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA8037T/C1J is usually 5 days.
3.What payment methods are accepted for TDA8037T/C1J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA8037T/C1J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA8037T/C1J?
TDA8037T/C1J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA8037T/C1J 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/C1J?
For technical support, including TDA8037T/C1J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA8037T/C1J requirements.
6.How does Aetrix verify that TDA8037T/C1J is sourced from the original manufacturer or authorized distributors?
All TDA8037T/C1J 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/C1J meets industry standards.
7.What is the process for return or replacement of TDA8037T/C1J?
All TDA8037T/C1J units undergo pre-shipment inspection (PSI). If there is an issue with TDA8037T/C1J, 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/C1J part is unused and in its original packaging.
Return procedure for TDA8037T/C1J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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