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NXP Semiconductors TDA8024TT/C1/S1J
- Part No.:
- TDA8024TT/C1/S1J
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TDA8024TT/C1/S1J.pdf
- Description:
- IC INTERFACE SPECIALIZED 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,506
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Product details
Overview
TDA8024TT/C1/S1J from NXP Semiconductors is a complete analog smart card interface IC designed for ISO 7816-compliant 3 V or 5 V contact-based IC cards. It performs supply generation (VCC), protection, and control between the card and host microcontroller with integrated DC-to-DC converter, 26 MHz crystal oscillator, thermal/short-circuit protection, and three protected bidirectional I/O lines (C4/C7/C8). It enables secure banking readers and EMV payment terminals.
For engineers reviewing the TDA8024TT/C1/S1J datasheet, TDA8024TT/C1/S1J pinout, TDA8024TT/C1/S1J application, or TDA8024TT/C1/S1J equivalent, key selection considerations include its TSSOP28 package, 3 V/5 V dual-supply support, VCC regulation accuracy (±5%), 80 mA continuous card current capability, and ISO 7816/GSM11.11/EMV compliance.
Technical Context
The TDA8024TT/C1/S1J integrates a 26 MHz crystal oscillator and programmable clock divider (÷1/÷2/÷4/÷8) to generate synchronous card clocks up to 20 MHz. Its DC-to-DC converter operates as voltage doubler or follower depending on VDDP and selected VCC (3 V or 5 V), with automatic mode switching thresholds defined by hysteresis.
It implements hardware-controlled activation/deactivation sequences triggered by CMDVCC, with built-in 8 ms debounce on dual-presence inputs (PRES/PRES), thermal shutdown, and filtered overload detection at ~120 mA. All card-side I/O transceivers feature active pull-up, 15 mA current limiting, and ESD protection >6 kV per HBM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Supply Range | 2.7 V to 6.5 V - powers internal logic and host-side I/O; compatible with 3.3 V or 5 V system rails |
| VCC Output Accuracy | ±5% - regulated 3 V or 5 V card supply with ripple ≤350 mVp-p up to 200 MHz |
| Card Current Capacity | 80 mA @ 5 V / 65 mA @ 3 V - sufficient for full-speed EMV transaction bursts |
| CLK Frequency Options | fXTAL, fXTAL/2, fXTAL/4, fXTAL/8 - selectable via CLKDIV1/CLKDIV2; supports cards up to 20 MHz |
| ESD Protection (Card Side) | >6 kV HBM - meets ISO 7816-3 and EMV requirements for robust field deployment |
| Thermal Shutdown Threshold | Junction temperature >150 °C - prevents damage during sustained overload or poor PCB heatsinking |
| Deactivation Time (tde) | 50–100 µs - ensures safe, standardized card power removal per ISO 7816-3 timing |
Pinout & Package
TDA8024TT/C1/S1J uses the SOT361-1 package: plastic thin shrink small outline package (TSSOP28), 28 leads, 4.4 mm body width, gold wire bonding.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | CLKDIV1 / CLKDIV2 | Inputs selecting card clock frequency division ratio (÷1/÷2/÷4/÷8); must not change simultaneously |
| 3 | 5V/3V | Logic input selecting regulated VCC output: HIGH = 5 V, LOW = 3 V |
| 4, 6, 7, 8 | PGND / VDDP / S1 / S2 / VUP | DC-to-DC converter interface: PGND (power ground), VDDP (input), S1/S2 (capacitor nodes), VUP (output decoupling) |
| 9, 10 | PRES / PRES | Dual card presence inputs (active LOW/HIGH); internally debounced (8 ms typ.) |
| 11–13 | I/O / AUX1 / AUX2 | Three half-duplex bidirectional buffered I/O lines to card contacts C7/C4/C8; each with 11 kΩ pull-up to VCC |
| 15–17 | CLK / RST / VCC | Card clock (C3), reset output (C2), and regulated card supply (C1) |
| 19–20 | CMDVCC / RSTIN | Host command to initiate activation (active LOW); non-inverted reset input from host |
| 21–22 | VDD / GND | Main IC supply and system ground reference |
| 23 | OFF | NMOS interrupt output (active LOW) signaling card presence or fault condition to host |
| 24–25 | XTAL1 / XTAL2 | Crystal oscillator connections (26 MHz max); XTAL2 open if external clock used |
| 26–28 | I/OUC / AUX1UC / AUX2UC | Host-side data lines with 11 kΩ pull-up to VDD; isolated from VCC domain |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-to-DC Converter | Generates precise 3 V or 5 V VCC from 4–6.5 V VDDP; auto-selects doubler/follower mode based on VDDP and VCC setting |
| Synchronous Clock Generation | 26 MHz internal oscillator + programmable divider enables glitch-free, phase-coherent CLK transitions up to 20 MHz |
| Hardware Activation/Deactivation | Full ISO 7816-compliant sequence (VCC ramp, CLK enable, RST assert) initiated by single CMDVCC signal; no firmware overhead |
| Enhanced Card-Side Protection | Thermal shutdown, short-circuit detection, filtered 120 mA overload trip, and >6 kV HBM ESD on all card contacts |
| Dual-Presence Detection with Debounce | Supports both normally-open and normally-closed card switches via PRES/PRES inputs; 8 ms hardware debounce eliminates mechanical bounce |
| Supply Supervisor with Adjustable POR | Internal Power-on Reset (~8 ms); PORADJ pin allows external resistor bridge to double pulse width and adjust threshold for diverse MCU supply rails |
Applications
| Banking Card Reader | EMV Payment Terminal |
|---|---|
Use Scenario: Contact-based chip card reading in ATMs, point-of-sale (POS) terminals, and self-service kiosks. IC Role / Device Role / Timing Role: Acts as the physical layer interface between host MCU and ISO 7816 card; manages VCC, CLK, RST, and I/O timing per EMV Level 1 requirements. Use Value: Enables certified EMV transaction execution with guaranteed VCC stability (±5%), controlled rise/fall times, and fault-safe deactivation - critical for payment certification. |
Use Scenario: Secure financial transaction processing where card power, clock, and data integrity must meet PCI PTS and EMVCo requirements. IC Role / Device Role / Timing Role: Provides regulated 3 V/5 V card supply, synchronized 1–20 MHz clock, and protected bidirectional I/O for C1–C8 contacts per ISO 7816-3. Use Value: Eliminates need for discrete LDOs, oscillators, and protection circuitry - reduces BOM count and layout area while ensuring compliance with EMVCo test cases. |
| Secure ID Authentication | Pay-TV Conditional Access |
Use Scenario: Government or enterprise identity verification using PKI-enabled smart cards (e.g., ePassports, PIV/CAC). IC Role / Device Role / Timing Role: Interfaces host controller to cryptographic smart card; handles secure power sequencing, clock jitter control (<1% duty deviation), and ESD-hardened I/O for tamper-resistant operation. Use Value: Meets FIPS 201 and ICAO ePassport timing specs with <100 µs deactivation time and <350 mVp-p VCC ripple - essential for secure key exchange reliability. |
Use Scenario: Subscriber authentication and content decryption in digital TV set-top boxes using conditional access modules (CAMs). IC Role / Device Role / Timing Role: Supplies stable 3 V/5 V power and precise clock to CAM; monitors card presence and faults via OFF pin to trigger secure session termination. Use Value: Prevents unauthorized CAM hot-swapping via hardware-enforced deactivation and real-time fault reporting - satisfies DVB-CI and CI+ security mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart card interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA8024T/C1 | SO28 package (7.5 mm width); higher thermal resistance (70 K/W vs. 100 K/W); same electrical specs and pinout | Better suited for through-hole or legacy SOIC layouts; less space-constrained designs | Select when board real estate allows larger footprint and thermal management is less critical |
| TDA8024AT/C1 | Omits PORADJ pin (not connected); fixed 8 ms POR pulse; identical TSSOP28 pinout and core functionality | Used where adjustable power-on reset is unnecessary; simplified design with fewer external components | Choose for cost-sensitive, fixed-rail systems without variable MCU supply tolerance requirements |
Compared with TDA8024T/C1 and TDA8024AT/C1, the TDA8024TT/C1/S1J offers the smallest footprint (TSSOP28), gold-wire bonding for enhanced reliability, and full PORADJ adjustability - making it optimal for compact, high-reliability EMV and secure ID applications requiring flexible reset threshold tuning.
Availability
TDA8024TT/C1/S1J is available at Aetrix Electronics and suitable for banking card readers, EMV payment terminals, and secure ID authentication systems requiring stable component supply, long-term lifecycle support, and certified smart card interface performance.
Supply support for TDA8024TT/C1/S1J 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, with deep expertise in smart card and secure element technologies.
The TDA8024 series belongs to NXP's dedicated smart card interface product line, engineered specifically to simplify ISO 7816-compliant reader design by integrating power, clock, protection, and protocol-handling functions into a single IC.
FAQ
What is the primary function of the TDA8024TT/C1/S1J in a smart card system?
The TDA8024TT/C1/S1J serves as a complete analog interface between a host microcontroller and ISO 7816-compliant contact smart cards. It generates and regulates the card's VCC supply (3 V or 5 V), provides a synchronized clock signal (up to 20 MHz), controls reset timing, buffers and protects three bidirectional I/O lines (C4/C7/C8), and executes hardware-managed activation/deactivation sequences - all within a single TSSOP28 package.
Does the TDA8024TT/C1/S1J support both 3 V and 5 V smart cards?
Yes, the TDA8024TT/C1/S1J supports both 3 V and 5 V smart cards. The 5V/3V pin (Pin 3) selects the output VCC level: logic HIGH configures 5 V output (4.75–5.25 V), and logic LOW configures 3 V output (2.85–3.15 V). The device maintains ±5% regulation accuracy and handles current pulses up to 40 nAs at frequencies up to 20 MHz for either voltage mode.
How does the TDA8024TT/C1/S1J handle card presence detection?
The TDA8024TT/C1/S1J features dual card presence inputs (PRES and PRES, Pins 9 and 10) supporting both normally-open and normally-closed mechanical switches. It includes an integrated 8 ms hardware debounce circuit to eliminate switch bounce artifacts. When either input asserts, the device recognizes the card as present and signals status via the OFF pin - enabling reliable, firmware-independent presence sensing in banking and ID readers.
What protection features does the TDA8024TT/C1/S1J provide for smart card contacts?
The TDA8024TT/C1/S1J provides comprehensive protection for all card contacts: thermal shutdown (>150 °C junction), short-circuit detection on VCC and I/O lines, filtered overload detection at ~120 mA, and >6 kV HBM ESD protection on card-side pins (I/O, RST, AUX1, AUX2, CLK, PRES, PRES). These features ensure robust operation in uncontrolled environments like public POS terminals and ATMs.
Can the TDA8024TT/C1/S1J be used with an external clock source instead of a crystal?
Yes, the TDA8024TT/C1/S1J supports external clock input via XTAL1 (Pin 24). When using an external clock, XTAL2 (Pin 25) must be left open-circuit. The internal 26 MHz oscillator is disabled, and the applied clock drives the CLK output after division by CLKDIV1/CLKDIV2. This configuration simplifies design where a system clock is already available and reduces component count versus crystal-based timing.
TDA8024TT/C1/S1J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- -
- Interface:
- Analog
- Voltage - Supply:
- 2.7V ~ 6.5V
- Supplier Device Package:
- 28-TSSOP
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TDA8024TT/C1/S1J FAQ
1.How can I place an order for TDA8024TT/C1/S1J through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA8024TT/C1/S1J 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 TDA8024TT/C1/S1J reliable?
The price and inventory of TDA8024TT/C1/S1J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA8024TT/C1/S1J is usually 5 days.
3.What payment methods are accepted for TDA8024TT/C1/S1J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA8024TT/C1/S1J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA8024TT/C1/S1J?
TDA8024TT/C1/S1J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA8024TT/C1/S1J 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 TDA8024TT/C1/S1J?
For technical support, including TDA8024TT/C1/S1J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA8024TT/C1/S1J requirements.
6.How does Aetrix verify that TDA8024TT/C1/S1J is sourced from the original manufacturer or authorized distributors?
All TDA8024TT/C1/S1J 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 TDA8024TT/C1/S1J meets industry standards.
7.What is the process for return or replacement of TDA8024TT/C1/S1J?
All TDA8024TT/C1/S1J units undergo pre-shipment inspection (PSI). If there is an issue with TDA8024TT/C1/S1J, 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 TDA8024TT/C1/S1J part is unused and in its original packaging.
Return procedure for TDA8024TT/C1/S1J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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