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NXP Semiconductors TDA8024TT/C1,118
- Part No.:
- TDA8024TT/C1,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TDA8024TT/C1,118.pdf
- Description:
- IC INTERFACE SPECIALIZED 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,916
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Product details
Overview
TDA8024TT/C1,118 from NXP Semiconductors is a smart card interface IC designed to sit between ISO 7816-compliant cards and host microcontrollers, providing regulated 3 V or 5 V card supply (VCC), three protected bidirectional I/O lines (C4/C7/C8), integrated 26 MHz crystal oscillator, and automatic activation/deactivation sequencing. It supports EMV, GSM11.11, and ISO 7816 standards in banking card readers and electronic payment terminals.
For engineers reviewing the TDA8024TT/C1,118 datasheet, TDA8024TT/C1,118 pinout, TDA8024TT/C1,118 application, or TDA8024TT/C1,118 equivalent, key selection criteria include its TSSOP28 package with gold wires, 80 mA continuous VCC output capability, thermal/short-circuit protection on all card contacts, and synchronous clock division (÷1/2/4/8) for up to 20 MHz card operation.
Technical Context
The TDA8024TT/C1,118 integrates a DC-to-DC converter that operates as either a voltage doubler or follower depending on VDDP and selected VCC (3 V or 5 V), with internal thresholds and hysteresis ensuring stable power-up/down behavior. Its sequencer initiates hardware- or software-triggered activation, controlling VCC ramp, CLK enablement, and RST assertion with precise timing intervals referenced to a 25 µs internal oscillator period.
Three identical half-duplex transceivers (I/O, AUX1, AUX2) feature active pull-up circuitry delivering >1 mA at 0.9×VCC into 80 pF loads, while built-in 8 ms debounce on dual PRES inputs handles mechanical switch bounce during card insertion/removal. The OFF interrupt output signals card presence or fault conditions with NMOS open-drain drive and 20 kΩ internal pull-up to VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Output | Regulated 3 V ±5% or 5 V ±5%; supplies up to 80 mA (5 V) or 65 mA (3 V) with filtered overload detection at ~120 mA |
| Supply Inputs | VDD = 2.7–6.5 V (IC logic); VDDP = 4.0–6.5 V (DC-DC input); independent power domains enable VCC ≠ VDD operation |
| Card Clock | Derived from 26 MHz internal oscillator or external crystal; programmable ÷1/2/4/8 division yields 20 MHz max card clock with synchronous frequency changes |
| I/O Protection | Thermal and short-circuit protection on all card contacts (I/O, RST, AUX1, AUX2, CLK, PRES); ESD >6 kV HBM on card-side pins |
| Package | TSSOP28 (SOT361-1); 28-pin plastic thin shrink small outline, 4.4 mm body width, gold wire bonding |
| Operating Temp | −25 °C to +85 °C ambient; junction temperature limited to 150 °C; thermal resistance Rth(j-a) = 100 K/W in free air |
Pinout & Package
TDA8024TT/C1,118 uses a TSSOP28 package (SOT361-1) with 4.4 mm body width and gold wire interconnects. Pin functions are identical to the SO28 variant except PORADJ (pin 18) remains unconnected - no external resistor bridge support.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CLKDIV1 | CLK frequency select input | Binary control bit for synchronous clock division (÷1/2/4/8); must not change simultaneously with CLKDIV2 |
| 3 5V/3V | VCC selection input | Logic HIGH selects 5 V card supply; LOW selects 3 V; sets DC-DC operating mode and thresholds |
| 11 I/O | Card contact C7 transceiver | Half-duplex bidirectional line with 11 kΩ pull-up to VCC; current-limited to 15 mA; max 1 MHz data rate |
| 16 RST | Card reset output | Active-low open-drain output driving card contact C2; enabled after t5 in activation sequence |
| 17 VCC | Regulated card supply output | Delivers filtered 3 V or 5 V to card contact C1; requires two 100 nF (or 100+220 nF) decoupling caps to CGND |
| 23 OFF | Fault/interrupt output | NMOS open-drain output (20 kΩ pull-up to VDD); LOW indicates card absence or emergency deactivation |
| 24 XTAL1 | Crystal/clock input | Accepts 26 MHz crystal or external clock signal; duty cycle 48–52% required for 45–55% CLK output duty |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC converter | Generates 3 V or 5 V VCC from 4–6.5 V VDDP; auto-selects voltage doubler/follower mode based on VDDP and 5V/3V pin state |
| Synchronous clock division | Four selectable frequencies (fXTAL, fXTAL/2, fXTAL/4, fXTAL/8) with glitch-free transitions preserving minimum pulse width and duty cycle integrity |
| Dual-presence detection | Two independent PRES inputs (active-HIGH and active-LOW) with 8 ms built-in debounce, enabling compatibility with normally-open or normally-closed card switches |
| Automatic activation/deactivation | Hardware-sequenced power-up (VCC ramp, CLK enable, RST assert) and power-down (RST low, CLK low, VCC discharge) triggered by CMDVCC edge |
| Card-side ESD protection | Exceeds 6 kV per HBM on I/O, RST, AUX1, AUX2, CLK, PRES pins - meets ISO 7816-3 and EMV requirements for robust field deployment |
Applications
| Banking Card Readers | EMV Payment Terminals |
|---|---|
Use Scenario: Secure reading of chip-based debit/credit cards in ATMs and point-of-sale devices. IC Role / Device Role / Timing Role: Provides isolated, regulated VCC, controlled CLK/RST timing, and protected I/O buffering between host MCU and card contacts per ISO 7816-3. Use Value: Enables reliable ATR exchange and command-response transactions under variable card load and environmental stress, with automatic fault recovery on card removal or short-circuit. | Use Scenario: Contact-based transaction processing in certified payment terminals compliant with EMV Level 1. IC Role / Device Role / Timing Role: Acts as the physical layer interface enforcing EMV timing constraints (e.g., CLK stability, RST assertion duration, VCC ramp rate) and electrical safety limits. Use Value: Guarantees interoperability with diverse EMV cards by meeting strict voltage accuracy (±5%), ripple (<350 mVp-p), and current delivery (80 mA @ 5 V) requirements. |
| Secure Identification Systems | Pay-TV Conditional Access Modules |
Use Scenario: Government ID, e-passport, or corporate access cards requiring tamper-resistant communication. IC Role / Device Role / Timing Role: Delivers secure, low-noise power and timing to cryptographic cards while monitoring for physical intrusion via PRES and thermal faults. Use Value: Prevents side-channel attacks by suppressing power glitches during activation/deactivation and detecting card hot-plug attempts via OFF interrupt signaling. | Use Scenario: Smart card interfaces in set-top boxes for subscription management and content decryption. IC Role / Device Role / Timing Role: Interfaces host SoC with conditional access cards (e.g., CI+, DVB-CI), managing VCC, CLK, and RST per EN 50221 timing profiles. Use Value: Ensures uninterrupted service by sustaining card operation during brownouts via independent VDDP supply and detecting card removal before session corruption. |
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); includes PORADJ pin for external reset threshold adjustment; higher thermal resistance (70 K/W vs. 100 K/W) | Preferred where board space allows larger footprint and adjustable POR threshold is needed for custom supply supervision | Select TDA8024T/C1 when external resistor bridge on PORADJ is required to extend Power-on Reset pulse width to ~16 ms |
| TDA8024AT/C1 | SO28 package; PORADJ pin omitted; identical functional spec except no external reset threshold adjustment capability | Suitable for cost-sensitive designs where fixed 8 ms POR pulse suffices and smaller TSSOP28 footprint is unnecessary | Choose TDA8024AT/C1 only if TSSOP28 assembly is unavailable and PORADJ functionality is not required |
Compared with TDA8024TT/C1,118, the TDA8024T/C1 offers adjustable reset timing but requires more PCB area, while the TDA8024AT/C1 sacrifices POR flexibility for lower cost in SO28 - making TDA8024TT/C1,118 optimal for space-constrained, high-reliability smart card readers needing gold-wire reliability and fixed 8 ms POR.
Availability
TDA8024TT/C1,118 is available at Aetrix Electronics and suitable for banking card readers, EMV payment terminals, and secure identification systems requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for TDA8024TT/C1,118 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 consumer applications, with deep expertise in smart card and secure element technologies.
The TDA8024 product line delivers fully integrated, standards-compliant analog interfaces for ISO 7816 smart cards - designed specifically to reduce external component count and simplify certification in financial, identity, and pay-TV systems.
FAQ
What is the maximum continuous current the TDA8024TT/C1,118 can deliver to a 5 V smart card?
The TDA8024TT/C1,118 delivers up to 80 mA continuously at 5 V card supply (VCC) with ripple <350 mVp-p. It incorporates an internal overload detector triggering at approximately 120 mA, allowing brief current pulses (e.g., 40 nAs spikes up to 20 MHz) without deactivation, provided average current stays within the 80 mA limit. This capability ensures reliable operation with demanding EMV cards during ATR and command execution phases.
Does the TDA8024TT/C1,118 support both 3 V and 5 V smart cards in the same design?
Yes, the TDA8024TT/C1,118 supports both 3 V and 5 V smart cards via the 5V/3V pin (pin 3): logic HIGH configures VCC for 5 V ±5%, LOW for 3 V ±5%. The DC-to-DC converter automatically adapts its topology (voltage follower or doubler) based on VDDP and the 5V/3V setting. This eliminates manual jumpering or redesign when supporting multi-voltage card fleets in banking or ID applications using the TDA8024TT/C1,118.
How does the TDA8024TT/C1,118 handle card insertion and removal events?
The TDA8024TT/C1,118 uses dual PRES inputs (pins 9 and 10) with built-in 8 ms debounce to detect card presence reliably. During insertion, OFF goes HIGH only after debounce completes; during removal, the first valid transition triggers immediate emergency deactivation - pulling RST low, halting CLK, and discharging VCC. The OFF pin then goes LOW, signaling the host MCU of card extraction or fault, enabling clean session termination without data corruption in the TDA8024TT/C1,118.
Can the TDA8024TT/C1,118 generate the card clock signal without an external crystal?
Yes, the TDA8024TT/C1,118 includes a 26 MHz integrated crystal oscillator. When a crystal is connected between XTAL1 (pin 24) and XTAL2 (pin 25), the oscillator starts automatically at power-up. Alternatively, an external 26 MHz clock can be applied to XTAL1 with XTAL2 left open. The internal clock circuitry then divides this source synchronously (÷1/2/4/8) to produce the card clock (CLK) on pin 15, supporting up to 20 MHz operation without external timing components in the TDA8024TT/C1,118.
What protection features does the TDA8024TT/C1,118 provide for smart card contacts?
The TDA8024TT/C1,118 provides comprehensive protection: thermal and short-circuit protection on all card contacts (I/O, RST, AUX1, AUX2, CLK, PRES); >6 kV HBM ESD rating on card-side pins; filtered overload detection at ~120 mA; and controlled VCC ramp/fall rates to prevent card latch-up. These features meet ISO 7816-3 and EMV requirements, ensuring robust field operation in environments with frequent card insertion/removal or electrical noise - critical for long-term reliability of the TDA8024TT/C1,118.
TDA8024TT/C1,118 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/C1,118 FAQ
1.How can I place an order for TDA8024TT/C1,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA8024TT/C1,118 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/C1,118 reliable?
The price and inventory of TDA8024TT/C1,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA8024TT/C1,118 is usually 5 days.
3.What payment methods are accepted for TDA8024TT/C1,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA8024TT/C1,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA8024TT/C1,118?
TDA8024TT/C1,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA8024TT/C1,118 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/C1,118?
For technical support, including TDA8024TT/C1,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA8024TT/C1,118 requirements.
6.How does Aetrix verify that TDA8024TT/C1,118 is sourced from the original manufacturer or authorized distributors?
All TDA8024TT/C1,118 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/C1,118 meets industry standards.
7.What is the process for return or replacement of TDA8024TT/C1,118?
All TDA8024TT/C1,118 units undergo pre-shipment inspection (PSI). If there is an issue with TDA8024TT/C1,118, 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/C1,118 part is unused and in its original packaging.
Return procedure for TDA8024TT/C1,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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