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NXP Semiconductors TDA8025HN/C1,551
- Part No.:
- TDA8025HN/C1,551
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TDA8025HN/C1,551.pdf
- Description:
- IC INTFACE SPECIALIZED 32HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,503
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Product details
Overview
TDA8025HN/C1,551 from NXP Semiconductors is a cost-effective analog smart card interface IC supporting 3 V, 1.8 V, and optionally 1.2 V card supply voltages with ±5 % regulation, integrated thermal/short-circuit protection, and ESD robustness >6 kV on card-side contacts. It delivers up to 65 mA at 3 V or 1.8 V and 30 mA at 1.2 V, enabling use in bank card readers and Pay TV conditional access modules.
For engineers reviewing the TDA8025HN/C1,551 datasheet, TDA8025HN/C1,551 pinout, TDA8025HN/C1,551 application, or TDA8025HN/C1,551 equivalent, key selection criteria include VCC regulation accuracy across three voltage modes, built-in debouncing (4.5 ms), synchronous clock division (fxtal, ½fxtal, ¼fxtal, ⅛fxtal), automatic activation/deactivation sequencing, and HVQFN32 package compatibility with ISO/IEC 7816-3 compliant systems.
Technical Context
The TDA8025HN/C1,551 implements a dual-supply architecture: VDDI(REG) powers an internal regulator generating VDD(INTREGD) (3.0–3.6 V), while VDD(INTF) supplies the microcontroller interface and must not exceed VDD(INTREGD) + 0.3 V. Pin CONFIG selects between regulated (3.6–5.5 V input) or bypassed (3.0–3.6 V) core operation.
Its clock subsystem supports either internal oscillator or external crystal (≤26 MHz) via XTAL1/XTAL2, with synchronous frequency division controlled by CLKDIV1/CLKDIV2. Card I/O lines (C4/C7/C8) feature half-duplex buffered bidirectional operation with active pull-up, 15 mA current limiting, and 1 MHz max data rate - all referenced to respective supply domains (VCC for card, VDD(INTF) for MCU).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Options | 3 V, 1.8 V, or 1.2 V ±5 %; selected via VCC_SEL1/VCC_SEL2 pins with external capacitors (220 nF + 470 nF, ESR < 100 mΩ) |
| Max Output Current | 65 mA at 3 V or 1.8 V; 30 mA at 1.2 V; overload protected to ±135 mA with 200 ns pulse tolerance |
| Card Clock Frequency | Up to 20 MHz; generated from fxtal, ½fxtal, ¼fxtal, or ⅛fxtal using CLKDIV1/CLKDIV2; synchronous transitions ensure ≥45 % duty cycle |
| ESD Protection | >6 kV HBM on card-side contacts (C1–C8); integrated thermal and short-circuit protection per contact |
| Debouncing Time | Typical 4.5 ms on PRES/PRESN card presence inputs; eliminates mechanical bounce without external RC |
| Supply Supervision | Dual threshold detection: fixed 2.7 V on VDD(INTREGD); adjustable on VDD(INTF) via PORADJ resistor bridge (1.24 V default) |
| Package | HVQFN32 (SOT617-1); 5 × 5 × 0.85 mm; thermally enhanced, leadless, 32-terminal footprint |
Pinout & Package
HVQFN32 (SOT617-1) package: 5 mm × 5 mm body, 0.85 mm height, exposed thermal pad, no leads. Pin 1 index located at top-left corner (see transparent top view in datasheet Figure 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CMDVCCN (1) | Microcontroller activation trigger | Active LOW input initiating full card power-up sequence; synchronizes VCC ramp, CLK enable, and RST assertion |
| VCC (18) | Card supply output | Regulated 3 V / 1.8 V / 1.2 V output to C1 contact; decoupled with 220 nF + 470 nF low-ESR MLCCs to CGND |
| CLK (15) | Card clock output | Drives C3 contact at up to 20 MHz; frequency set by XTAL1 source and CLKDIV1/CLKDIV2 logic |
| RST (17) | Card reset output | Drives C2 contact; asserted during activation/deactivation; mirrors RSTIN when enabled |
| I/O (11) | Card data I/O | Half-duplex bidirectional line for C7; internally pulled up to VCC; 15 mA current-limited, 1 MHz max rate |
| AUX1 (13) | Card auxiliary I/O | Half-duplex bidirectional line for C4; pulled up to VCC; same current/rate limits as I/O |
| AUX2 (12) | Card auxiliary I/O | Half-duplex bidirectional line for C8; pulled up to VCC; same current/rate limits as I/O |
| CGND (14) | Card signal ground | Dedicated low-impedance return path for card contacts (C1–C8); isolated from system GND to reduce noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage card supply | Hardware-selectable 3 V / 1.8 V / 1.2 V output with ±5 % accuracy and ripple <350 mVp-p, eliminating external LDOs |
| Synchronous clock division | Four discrete clock rates (fxtal, ½fxtal, ¼fxtal, ⅛fxtal) switched without glitches; ensures stable timing during protocol changes |
| Automatic activation/deactivation | Fully sequenced hardware-controlled power-up/down (tdeact = 35–100 µs); triggered by CMDVCCN, independent of MCU firmware timing |
| Integrated card presence detection | Dual-input (PRES/PRESN) with 4.5 ms hardware debouncing; eliminates need for external timers or GPIO polling |
| NDS certification | Fully certified for Pay TV conditional access applications; meets security and interoperability requirements for broadcast decryption |
Applications
| Pay TV Conditional Access | EMV Bank Card Readers |
|---|---|
|
Use Scenario: Secure decryption of encrypted broadcast streams in set-top boxes using ISO 7816-compliant smart cards. IC Role / Device Role / Timing Role: Provides regulated 3 V/1.8 V supply, synchronized 1–5 MHz clock, and protected I/O for C1–C8 contacts per ISO/IEC 7816-3. Use Value: Enables NDS-certified operation with built-in ESD protection (>6 kV) and automatic activation, reducing system-level validation effort. |
Use Scenario: Reading EMV-compliant payment cards in point-of-sale terminals with hot-plug capability and fast transaction handshaking. IC Role / Device Role / Timing Role: Manages card insertion detection (PRES/PRESN), delivers precise 1–5 MHz clock with synchronous division, and handles 65 mA peak load during ATR exchange. Use Value: Guarantees reliable ATR response within 100 µs deactivation time and eliminates external debounce circuitry. |
| Secure ID Authentication | Government e-Passport Readers |
|
Use Scenario: Biometric identity verification using contact-based smart cards in physical access control systems. IC Role / Device Role / Timing Role: Supplies 1.8 V to ID cards, generates stable clock up to 20 MHz for high-speed data transfer, and provides thermal/short-circuit protection on all contacts. Use Value: Ensures uninterrupted operation under repeated card insertions and environmental stress, meeting ISO/IEC 14443-4 timing constraints. |
Use Scenario: Reading ICAO-compliant e-passports in border control kiosks requiring strict ISO/IEC 7816-3 compliance and tamper resistance. IC Role / Device Role / Timing Role: Delivers 3 V supply with ±5 % regulation, supports synchronous clock switching for APDU exchange, and integrates ESD protection exceeding IEC 61000-4-2 Level 4. Use Value: Reduces BOM count by integrating supply, protection, and sequencing - critical for compact, certified reader designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart card interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SLB9670 | Trusted Platform Module (TPM) controller with integrated secure crypto engine; no native 1.2 V card support; requires external LDO for variable card voltage | Targeted at PC/platform root-of-trust; lacks ISO 7816-3 analog interface functions (C1–C8 contact control, VCC regulation, clock generation) | Select SLB9670 only for TPM 2.0 host authentication; not a functional replacement for TDA8025HN/C1,551 in card reader hardware |
| ST8025 | Pin-compatible HVQFN32 variant from STMicroelectronics; identical pinout and register map; supports same 3 V/1.8 V/1.2 V modes and clock division | Drop-in alternative with identical electrical behavior and layout; validated for Pay TV and EMV readers per ST's AN4402 | ST8025 offers direct second-source availability with identical footprint and timing - ideal for supply chain diversification without redesign |
Compared with SLB9670 and ST8025, the TDA8025HN/C1,551 uniquely combines NDS certification, triple-voltage regulation with single-capacitor decoupling, and fully autonomous activation/deactivation sequencing - making it the preferred choice for certified, cost-sensitive smart card readers where analog interface integrity is critical.
Availability
TDA8025HN/C1,551 is available at Aetrix Electronics and suitable for Pay TV conditional access modules, EMV bank card readers, and government e-passport terminals requiring stable component supply, long-term lifecycle support, and ISO/IEC 7816-3 compliance.
Supply support for TDA8025HN/C1,551 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, with over 20 years of smart card interface innovation.
The TDA8025HN/C1,551 belongs to NXP's ISO 7816 analog interface product line, designed specifically for cost-sensitive, high-reliability smart card readers in Pay TV, banking, and secure ID applications - emphasizing integrated protection, low-power inactive mode, and certification-ready functionality.
FAQ
What voltage options does the TDA8025HN/C1,551 support for smart card supply?
The TDA8025HN/C1,551 supports three regulated card supply voltages: 3 V, 1.8 V, and optionally 1.2 V - each with ±5 % accuracy. Selection is controlled by VCC_SEL1 and VCC_SEL2 pins, and regulation uses one 220 nF and one 470 nF low-ESR ceramic capacitor tied to CGND. The TDA8025HN/C1,551 delivers up to 65 mA at 3 V or 1.8 V and 30 mA at 1.2 V, with built-in overload protection.
How does the TDA8025HN/C1,551 handle card presence detection and debouncing?
The TDA8025HN/C1,551 features dual card presence inputs - PRES (active HIGH) and PRESN (active LOW) - with built-in hardware debouncing of approximately 4.5 ms. This eliminates the need for external RC filters or firmware polling delays. The device considers the card present if either PRES or PRESN is asserted, and automatically initiates activation upon CMDVCCN assertion once presence is confirmed. The TDA8025HN/C1,551 integrates this function directly into its sequencer logic.
Can the TDA8025HN/C1,551 generate multiple clock frequencies for the smart card?
Yes, the TDA8025HN/C1,551 supports four synchronous clock frequencies - fxtal, ½fxtal, ¼fxtal, and ⅛fxtal - selected via the logic states of CLKDIV1 and CLKDIV2 pins. The clock source can be either the internal oscillator or an external crystal (≤26 MHz) connected to XTAL1/XTAL2. Frequency changes are glitch-free and maintain ≥45 % duty cycle; transitions take effect after 10 XTAL1 periods. The TDA8025HN/C1,551 outputs the selected clock on pin CLK to drive the card's C3 contact.
What protection features are integrated into the TDA8025HN/C1,551 for smart card contacts?
The TDA8025HN/C1,551 integrates thermal protection, short-circuit protection, and >6 kV HBM ESD protection on all card-side contacts (C1–C8). Each contact is individually monitored, and faults trigger automatic deactivation. The VCC regulator includes overload detection (±135 mA threshold) with filtering to tolerate 200 ns current pulses up to 200 mA without false triggering. These protections are implemented in hardware and require no external components. The TDA8025HN/C1,551 ensures robust operation even under repeated card insertion/removal cycles.
Is the TDA8025HN/C1,551 NDS certified, and what does that mean for Pay TV applications?
Yes, the TDA8025HN/C1,551 is NDS (Nagra Digital Services) certified - a mandatory requirement for conditional access modules used in Pay TV set-top boxes and integrated digital televisions. This certification validates that the IC meets stringent security, interoperability, and timing specifications defined by NDS for secure communication with smart cards. The TDA8025HN/C1,551 achieves this through its integrated protection, precise clock generation, and guaranteed activation/deactivation sequences - eliminating the need for additional certification testing at the system level.
TDA8025HN/C1,551 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Applications:
- -
- Interface:
- Analog
- Voltage - Supply:
- 1.2V, 1.8V, 3V
- Supplier Device Package:
- 32-HVQFN (5x5)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TDA8025HN/C1,551 FAQ
1.How can I place an order for TDA8025HN/C1,551 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA8025HN/C1,551 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 TDA8025HN/C1,551 reliable?
The price and inventory of TDA8025HN/C1,551 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA8025HN/C1,551 is usually 5 days.
3.What payment methods are accepted for TDA8025HN/C1,551?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA8025HN/C1,551 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA8025HN/C1,551?
TDA8025HN/C1,551 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA8025HN/C1,551 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 TDA8025HN/C1,551?
For technical support, including TDA8025HN/C1,551 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA8025HN/C1,551 requirements.
6.How does Aetrix verify that TDA8025HN/C1,551 is sourced from the original manufacturer or authorized distributors?
All TDA8025HN/C1,551 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 TDA8025HN/C1,551 meets industry standards.
7.What is the process for return or replacement of TDA8025HN/C1,551?
All TDA8025HN/C1,551 units undergo pre-shipment inspection (PSI). If there is an issue with TDA8025HN/C1,551, 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 TDA8025HN/C1,551 part is unused and in its original packaging.
Return procedure for TDA8025HN/C1,551:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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