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STMicroelectronics ST8024CDR
- Part No.:
- ST8024CDR
- Manufacturer:
- STMicroelectronics
- Category:
- Specialized
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST8024CDR.pdf
- Description:
- IC INTERFACE SPECIALIZED 28SO
- Quantity:
- Payment:
- Shipping:
Inventory:365
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Product details
Overview
ST8024CDR from STMicroelectronics is a smartcard analog interface IC designed for ISO 7816, EMV, and GSM11.11-compliant systems. It provides regulated 3 V/5 V card supply (VCC), integrated 26 MHz crystal oscillator, three protected half-duplex I/O lines (C4/C7/C8), DC-DC converter (VDDP-powered), and automatic activation/deactivation sequencing. Used in set-top-box smartcard readers and banking IC card terminals.
For engineers reviewing the ST8024CDR datasheet, ST8024CDR pinout, ST8024CDR application, or ST8024CDR equivalent, key selection criteria include VCC regulation accuracy (±5 %), thermal/short-circuit protection on all card contacts, synchronous clock division (÷1/2/4/8), non-inverted RST control via RSTIN, and ESD robustness (>6 kV on card side).
Technical Context
The ST8024 integrates a step-up converter generating VCC from VDDP (4–6.5 V), with overload detection at ~120 mA and slew rate control (0.08–0.22 V/µs). Its internal oscillator operates at 26 MHz and feeds a programmable clock divider (CLKDIV1/CLKDIV2) to deliver synchronous 20 MHz max clock to the card.
It implements dual-domain I/O buffering: card-side pins (I/O, AUX1, AUX2) feature 11 kΩ pull-ups to VCC and ±15 mA current limiting; MCU-side pins (I/OUC, AUX1UC, AUX2UC) use 11 kΩ pull-ups to VDD and support 1 MHz max data rate with 200 ns inter-domain delay. Activation is triggered by CMDVCC or RSTIN, with hardware-initiated deactivation on short-circuit, card removal, or overtemperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Output | 3 V or 5 V ±5 % regulated supply for smartcard; supports 80 mA continuous load and 100 mA transient pulses. |
| CLK Frequency | Up to 20 MHz output to card (C3), selectable via CLKDIV1/CLKDIV2 (÷1, ÷2, ÷4, ÷8); synchronous switching avoids glitches. |
| ESD Protection | >6 kV HBM on card contacts (I/O, RST, AUX1, AUX2, CLK), enabling direct insertion without external TVS. |
| Supply Range | VDD = 2.7–6.5 V; VDDP = 4–6.5 V (for 5 V card) or 3–6.5 V (for 3 V card); enables flexible host power architecture. |
| Thermal Protection | Automatic shutdown at 150 °C junction temperature; recovery after cooldown without latch-up. |
| Card Presence | Dual-input PRES (active-low) and PRES (active-high) with built-in debounce; eliminates need for external RC filtering. |
| Reset Control | RSTIN accepts non-inverted MCU reset signal; drives card RST with 2 µs propagation delay and 20 mA current limit. |
Pinout & Package
ST8024CDR is housed in SO-28 (Small Outline, 300 mil width) package with standard 1.27 mm pitch and tape-and-reel packaging (1000 units/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | CLKDIV1, CLKDIV2 | Binary-select inputs for clock division ratio (÷1/2/4/8); determine final CLK frequency delivered to card. |
| 3 | 5V/3V | Logic-level input selecting target card voltage; configures internal regulator and protection thresholds. |
| 4,7 | PGND, C1− | Power ground and return path for step-up converter; must be low-inductance connection to minimize ripple. |
| 5,6 | C1+, VDDP | External capacitor node and primary input for DC-DC converter; accepts 4–6.5 V ±20 % supply. |
| 8 | VUP | Step-up converter output; feeds internal VCC regulator and requires local 80–220 nF decoupling. |
| 9,10 | PRES, PRES | Complementary card presence sense inputs; internally debounced and tolerant of mechanical switch bounce. |
| 11–13 | I/O, AUX2, AUX1 | Half-duplex buffered I/O lines to card contacts C7/C8/C4; each has 11 kΩ pull-up to VCC and ±15 mA fault current limit. |
| 14 | CGND | Card signal ground reference (C5); isolated from PGND/VDD ground to reduce noise coupling. |
| 15–17 | CLK, RST, VCC | Card clock (C3), reset (C2), and regulated supply (C1); CLK supports 20 MHz with 16 ns rise/fall time. |
| 18 | VTHSEL | Undervoltage lockout threshold selector; sets VCC deactivation point during brownout conditions. |
| 19 | CMDVCC | Active-low hardware activation trigger; initiates full power-up sequence independent of software. |
| 20 | RSTIN | Non-inverted MCU reset input; directly controls card RST with 2 µs delay and no polarity inversion. |
| 21,22 | VDD, GND | Main IC supply (2.7–6.5 V) and digital ground; powers logic, oscillator, and MCU-side I/O buffers. |
| 23 | OFF | Open-drain interrupt output (NMOS drain + 20 kΩ pull-up to VDD); signals fault events (overload, overtemp, card removal). |
| 24,25 | XTAL1, XTAL2 | 26 MHz crystal oscillator connections; supports external clock injection if XTAL2 left open. |
| 26–28 | I/OUC, AUX1UC, AUX2UC | MCU-side transceiver outputs; 11 kΩ pull-ups to VDD, 1 MHz max data rate, 200 ns delay vs card-side counterparts. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated VCC Regulator | Delivers stable 3 V or 5 V ±5 % from VDDP input; handles 40 nA current spikes up to 20 MHz without dropout. |
| Synchronous Clock Division | Four selectable clock ratios (÷1/2/4/8) with glitch-free transitions; maintains phase coherence across changes. |
| Triple Card I/O Protection | Each of I/O, AUX1, AUX2 includes thermal shutdown, short-circuit current limiting (±15 mA), and >6 kV ESD. |
| Hardware Activation/Deactivation | Full power sequencing initiated by CMDVCC or RSTIN; automatic emergency shutdown on card removal or overtemperature. |
| Supply Supervisor with Adjustable POR | Internal or resistor-programmable power-on reset (4–24 ms pulse width); suppresses supply spikes during power-up/down. |
Applications
| Set-Top Box Smartcard Readers | Banking IC Card Terminals |
|---|---|
Use Scenario: Secure conditional access module in pay-TV receivers requiring ISO 7816-compliant card interface. IC Role / Device Role / Timing Role: Analog front-end managing VCC regulation, clock generation, reset timing, and bidirectional data buffering between card and host MCU. Use Value: Eliminates discrete DC-DC, level-shifting, and protection components; reduces BOM count by ≥7 parts while meeting NDS compatibility requirements. | Use Scenario: EMV-compliant payment terminal reading chip-based credit/debit cards in ATMs and POS systems. IC Role / Device Role / Timing Role: Smartcard interface ensuring precise VCC ramp-up, controlled CLK edge rates (16 ns), and fault-safe deactivation on card ejection. Use Value: Guarantees <120 mA overload detection and thermal shutdown before card damage; satisfies EN 14443 and EMV Level 1 certification requirements. |
| Pay-TV Conditional Access Modules | ID & Access Control Systems |
Use Scenario: Compact CAM modules embedded in DVB-S/C/T receivers where space and reliability are critical. IC Role / Device Role / Timing Role: Provides 26 MHz crystal oscillator, programmable clock division, and 3/5 V auto-sensing for multi-standard card support. Use Value: Enables single-hardware design supporting both legacy 5 V and modern 3 V cards without manual configuration or firmware update. | Use Scenario: Physical access control readers using SIM-like smartcards for employee authentication in enterprise facilities. IC Role / Device Role / Timing Role: Manages card presence detection (dual PRES inputs), secure RST assertion, and filtered I/O signaling in noisy industrial environments. Use Value: Built-in debounce and 6 kV ESD protection eliminate external filtering components; ensures reliable operation in high-electrostatic environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smartcard interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST8004CDR | Direct predecessor; lacks integrated 26 MHz oscillator and synchronous clock division; uses external crystal only. | Requires external 3–5 MHz crystal and additional clock buffer; higher component count and layout complexity. | Select when legacy design reuse is prioritized and clock flexibility is not required. |
| MAX3232ESE+ | RS-232 transceiver; no smartcard-specific functions (no VCC regulation, no CLK generation, no card I/O protection). | Not functionally equivalent; intended for serial communication, not ISO 7816 interfaces. | Not recommended as replacement; only suitable for unrelated UART-level signal translation. |
Compared with ST8004CDR, ST8024CDR integrates oscillator and clock division-reducing external parts and improving timing integrity-while MAX3232ESE+ serves entirely different physical layer needs and cannot substitute for smartcard interface functionality.
Availability
ST8024CDR is available at Aetrix Electronics and suitable for set-top-box smartcard readers, banking IC card terminals, and pay-TV conditional access modules requiring stable component supply, long-term lifecycle support, and ISO 7816 compliance.
Supply support for ST8024CDR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, analog ICs, and smartcard solutions.
The ST8024 belongs to ST's secure interface product line, engineered specifically for cost-sensitive, high-reliability smartcard reader applications in broadcast, financial, and identification markets.
FAQ
What is the maximum allowable current on the VCC pin, and how does overload protection operate?
The ST8024CDR limits VCC output current to 90–120 mA under overload conditions. When instantaneous current exceeds ~120 mA, the device triggers filtered overload detection and initiates automatic deactivation within microseconds. This prevents damage to the card or interface circuitry and is independent of thermal shutdown, which activates at 150 °C junction temperature.
Can ST8024CDR support both 3 V and 5 V smartcards in the same design without hardware modification?
Yes. The 5V/3V pin selects operating mode: logic-high configures 5 V card support (VCC = 4.75–5.25 V), logic-low configures 3 V mode (VCC = 2.85–3.15 V). The internal regulator, protection thresholds, and clock divider settings adapt automatically. No external component changes are needed for dual-voltage compatibility.
How does the ST8024CDR handle card insertion and removal events?
It uses dual-presence inputs (PRES active-low and PRES active-high) with built-in hardware debounce. Card insertion triggers activation via CMDVCC or software command; removal causes immediate emergency deactivation-cutting VCC, disabling CLK/RST, and asserting OFF-within 200 µs. This meets ISO 7816-3 hot-swap safety requirements.
Is an external crystal required, or can the ST8024CDR operate with an external clock source?
The ST8024CDR includes a fully integrated 26 MHz crystal oscillator but also accepts external clock input. If using external clock, connect it to XTAL1 and leave XTAL2 unconnected (open). The internal oscillator remains disabled, reducing power consumption by ~0.3 mA in active mode compared to crystal operation.
ST8024CDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Smart Card Reader, Writer
- Interface:
- -
- Voltage - Supply:
- 2.7V ~ 6.5V
- Supplier Device Package:
- 28-SO
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
ST8024CDR FAQ
1.How can I place an order for ST8024CDR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST8024CDR 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 ST8024CDR reliable?
The price and inventory of ST8024CDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST8024CDR is usually 5 days.
3.What payment methods are accepted for ST8024CDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST8024CDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST8024CDR?
ST8024CDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST8024CDR 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 ST8024CDR?
For technical support, including ST8024CDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST8024CDR requirements.
6.How does Aetrix verify that ST8024CDR is sourced from the original manufacturer or authorized distributors?
All ST8024CDR 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 ST8024CDR meets industry standards.
7.What is the process for return or replacement of ST8024CDR?
All ST8024CDR units undergo pre-shipment inspection (PSI). If there is an issue with ST8024CDR, 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 ST8024CDR part is unused and in its original packaging.
Return procedure for ST8024CDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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