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STMicroelectronics ST8034CQR
- Part No.:
- ST8034CQR
- Manufacturer:
- STMicroelectronics
- Category:
- Specialized
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ST8034CQR.pdf
- Description:
- IC INTERFACE SPECIALIZED 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,017
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Product details
Overview
ST8034CQR from STMicroelectronics is a QFN16-packaged smartcard interface IC compliant with ISO 7816 and EMV™ 4.3 standards. It delivers programmable 5 V/3 V card supply (VCC), integrated crystal oscillator or external clock support up to 20 MHz, chip select (CS) for parallel interface isolation, and PORADJ-adjustable voltage supervision - deployed in banking card readers and pay-TV set-top boxes.
For engineers reviewing the ST8034CQR datasheet, ST8034CQR pinout, ST8034CQR application, or ST8034CQR equivalent, key selection criteria include chip select functionality, VCC_SEL absence (vs. ST8034P), PORADJ-based VDD(INTF) threshold tuning, thermal/short-circuit protection on all card contacts, and QFN16 footprint compatibility with space-constrained reader designs.
Technical Context
The ST8034CQR implements a fully autonomous smartcard activation/deactivation sequence triggered by CMDVCC, with synchronous clock frequency changes via CLKDIV and emergency deactivation on VDD(INTF) undervoltage, card removal, or thermal fault. Its internal LDO generates VCC from VDDP with controlled slew rate (0.04–0.30 V/µs) and overload detection.
Voltage supervision uses PORADJ to set VDD(INTF) reset threshold externally; all card-side I/O pins (I/O, RST, CLK, VCC, PRES) feature enhanced 8 kV HBM ESD protection and debounced card presence detection. The CS pin places microcontroller interface pins (I/OUC, OFF, RSTIN, etc.) into high-impedance state when low, enabling multi-device bus sharing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Output Voltage | 5 V or 3 V selectable; regulated ±2.5% at 65 mA load - ensures stable smartcard power per ISO 7816 Class A/B/C requirements. |
| Card Clock Frequency | Up to 20 MHz, programmable via CLKDIV pin with synchronous switching - supports EMV™ 4.3 high-speed transaction modes. |
| Supply Supervision | PORADJ-adjustable VDD(INTF) threshold (1.20–1.29 V typ); 10–30 mV hysteresis - enables precise reset timing for host MCU interfacing. |
| Thermal Protection | Overtemperature shutdown with automatic recovery - prevents latch-up during sustained card insertion/removal cycles. |
| ESD Robustness | 8 kV HBM on card-side pins (I/O, RST, CLK, VCC, PRES) - exceeds ISO 7816-3 mechanical/EMC reliability requirements. |
| Package | QFN16, 3 × 3 × 0.8 mm, 0.5 mm pitch - reduces PCB area by >60% vs. SO16 while maintaining thermal resistance of 60 °C/W. |
| Operating Temperature | −25 °C to +85 °C - qualified for industrial-grade set-top box and tachograph environments. |
Pinout & Package
ST8034CQR is housed in a thermally enhanced QFN16 package (3 × 3 × 0.8 mm, 0.5 mm pitch) with exposed thermal pad (not electrically connected). Pin 1 is marked by a dot; pin numbering follows standard top-through view counterclockwise layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD(INTF) | Microcontroller interface supply input (1.6–5.5 V); powers internal logic, PORADJ, CS, and I/OUC circuitry. |
| 2 | RSTIN | Active-high reset input from host MCU; initiates card deactivation when asserted during active mode. |
| 3 | CS | Chip select input; high = device active, low = I/OUC, OFF, RSTIN, CMDVCC, PRES, CLKIN placed in high-Z - enables shared bus topology. |
| 4 | CMDVCC | Active-low activation trigger; falling edge starts full card power-up sequence including VCC ramp and clock enable. |
| 5 | PRES | Active-low card presence sense; internally debounced with 10 ms filter - eliminates false triggers from mechanical contact bounce. |
| 6 | I/O | Half-duplex bidirectional buffered data line (C7); 9 kΩ pull-up to VCC - interfaces directly with ISO 7816-3 smartcard I/O pin. |
| 7 | GND | System ground reference for analog/digital sections; must be low-inductance connection to minimize noise coupling. |
| 8 | CLK | Card clock output (C3); driven by internal oscillator or external CLKIN; 50% duty cycle, <10 ns rise/fall time. |
| 9 | RST | Card reset output (C2); non-inverted, driven by RSTIN; meets ISO 7816-3 timing for cold/warm reset sequences. |
| 10 | VCC | Programmable card supply output (C1); 5 V or 3 V, with controlled rise/fall (0.04–0.30 V/µs) and short-circuit current limiting. |
| 11 | VDDP | LDO input for VCC generation; accepts 4.85–5.5 V (for 5 V VCC) or 3–5.5 V (for 3 V/1.8 V VCC) - decoupling critical for ripple rejection. |
| 12 | VDD | Core logic supply (2.7–5.5 V); powers internal sequencer, clock divider, and protection logic - independent of VDD(INTF). |
| 13 | PORADJ | External resistor divider input to set VDD(INTF) power-on reset threshold - enables custom brown-out behavior for host MCU synchronization. |
| 14 | OFF | Active-low interrupt output to host MCU; signals card insertion/removal, fault conditions, or activation completion. |
| 15 | I/OUC | Microcontroller I/O line (bidirectional); 10 kΩ pull-up to VDD(INTF); used for status readback or auxiliary control signaling. |
| 16 | CLKIN | External clock input (1–20 MHz); overrides internal oscillator when used - allows precise system-level clock domain alignment. |
Key Features
| Feature | Design Value |
|---|---|
| Chip Select (CS) Interface Isolation | Enables parallel connection of multiple ST8034CQR devices on same MCU bus without signal contention or level-shifting. |
| PORADJ-Adjustable Voltage Supervision | Allows precise tuning of VDD(INTF) reset threshold using external resistors - eliminates need for external supervisor IC in cost-sensitive designs. |
| Synchronous CLKDIV Frequency Switching | Changes card clock frequency without glitches or clock stoppage - maintains continuous communication during protocol transitions (e.g., PPS negotiation). |
| Integrated VCC Slew Rate Control | Guarantees 0.04–0.30 V/µs VCC ramp rates - satisfies ISO 7816-3 tW_VCC timing (15–30 ms) and prevents card latch-up. |
| Enhanced Card-Side ESD Protection | 8 kV HBM on I/O, RST, CLK, VCC, PRES - exceeds IEC 61000-4-2 Level 4 and eliminates need for discrete TVS diodes. |
Applications
| Banking Smartcard Readers | Pay-TV Set-Top Boxes |
|---|---|
|
Use Scenario: EMV-compliant contact-based payment terminals processing chip-and-PIN transactions. IC Role / Device Role / Timing Role: Full analog interface managing VCC sequencing, clock generation, reset assertion, and I/O buffering per ISO 7816-3 timing windows. Use Value: Eliminates discrete LDO, oscillator, and protection components; reduces BOM count by ≥7 parts while meeting PCI PTS v6.0 electrical compliance. |
Use Scenario: Conditional access modules (CAMs) in DVB-C/S/T receivers requiring secure card authentication. IC Role / Device Role / Timing Role: Provides isolated card interface with CS pin enabling dual-card support (e.g., subscription + parental control cards) on single MCU bus. Use Value: Enables concurrent card operation without software arbitration; QFN16 footprint fits within tight CAM module height constraints (<1.2 mm). |
| Identification Access Systems | Tachograph Smartcard Interfaces |
|
Use Scenario: Physical access control panels reading national ID or e-passport chips in government facilities. IC Role / Device Role / Timing Role: Manages card activation/deactivation sequences, detects card removal for session termination, and monitors VDD(INTF) for tamper detection. Use Value: Built-in emergency deactivation on VDD(INTF) drop or overheating meets EN 14803-1 physical security requirements for tamper-evident systems. |
Use Scenario: EU Type-Approved digital tachographs reading driver cards to record driving hours and vehicle activity. IC Role / Device Role / Timing Role: Delivers robust 3 V VCC supply with glitch-immune overload detection and 85 °C extended temperature operation. Use Value: Qualified for automotive under-hood ambient conditions; thermal protection prevents failure during prolonged cabin heat exposure (>70 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smartcard interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST8034PQR | Includes VCC_SEL pin for 5 V/3 V/1.8 V VCC selection; lacks CS pin - no bus isolation capability. | Suitable for single-card, multi-voltage systems (e.g., universal ID readers supporting legacy 5 V and modern 1.8 V cards). | Select ST8034PQR only if 1.8 V card support is required and chip select is unnecessary. |
| ST8034ATDT | SO16 package; fixed 5 V/3 V VCC selection (no VCC_SEL or CS); PORADJ absent - fixed VDD(INTF) threshold. | Targeted at cost-sensitive, non-space-constrained designs where board area is secondary to procurement simplicity. | Choose ST8034ATDT for legacy SO16 layouts or when QFN assembly infrastructure is unavailable. |
Compared with ST8034PQR and ST8034ATDT, ST8034CQR uniquely combines QFN16 miniaturization, chip select for multi-interface scalability, and PORADJ flexibility - making it optimal for next-generation compact, multi-card, and thermally demanding reader platforms.
Availability
ST8034CQR is available at Aetrix Electronics and suitable for banking smartcard readers, pay-TV set-top boxes, identification access systems, and tachograph interfaces requiring stable component supply across extended product lifecycles.
Supply support for ST8034CQR 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, designing and manufacturing analog, microcontroller, power, and smartcard interface solutions for industrial, automotive, and consumer markets.
The ST8034 series belongs to ST's secure interface product line, engineered specifically for ISO 7816-compliant smartcard reader applications - emphasizing integration, reliability, and certification readiness for financial and identity systems.
FAQ
What is the function of the CS pin on ST8034CQR?
The CS (chip select) pin enables bus isolation: when pulled low, all microcontroller-facing pins (I/OUC, OFF, RSTIN, CMDVCC, PRES, CLKIN) enter high-impedance state. This allows multiple ST8034CQR devices to share a single MCU interface bus without signal contention - essential for dual- or multi-card reader architectures.
Can ST8034CQR support 1.8 V smartcards?
No. ST8034CQR supports only 5 V and 3 V card supply voltages. Unlike ST8034PQR, it lacks the VCC_SEL pin required for 1.8 V selection. Its VCC output is programmable between 5 V and 3 V via internal configuration and CMDVCC timing - verified in Table 1 and Section 6.10 of the datasheet.
How does PORADJ affect voltage supervision behavior?
PORADJ sets the VDD(INTF) power-on reset threshold using an external resistor divider. With PORADJ tied to VDD(INTF), the threshold is fixed at 1.24 V (typ); adding a divider adjusts it linearly - enabling precise synchronization with host MCU reset timing and eliminating spurious resets during brown-out conditions.
What thermal performance can be expected in QFN16 package?
In JEDEC-standard multilayer board testing, ST8034CQR's QFN16 package achieves 60 °C/W junction-to-ambient thermal resistance - 31% lower than SO16 (87 °C/W). This allows sustained 70 mA card current at +85 °C ambient without derating, validated in Table 5 and thermal characterization reports.
ST8034CQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Smart Card
- Interface:
- -
- Voltage - Supply:
- 3V, 5V
- Supplier Device Package:
- 16-QFN (3x3)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
ST8034CQR FAQ
1.How can I place an order for ST8034CQR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST8034CQR 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 ST8034CQR reliable?
The price and inventory of ST8034CQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST8034CQR is usually 5 days.
3.What payment methods are accepted for ST8034CQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST8034CQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST8034CQR?
ST8034CQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST8034CQR 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 ST8034CQR?
For technical support, including ST8034CQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST8034CQR requirements.
6.How does Aetrix verify that ST8034CQR is sourced from the original manufacturer or authorized distributors?
All ST8034CQR 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 ST8034CQR meets industry standards.
7.What is the process for return or replacement of ST8034CQR?
All ST8034CQR units undergo pre-shipment inspection (PSI). If there is an issue with ST8034CQR, 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 ST8034CQR part is unused and in its original packaging.
Return procedure for ST8034CQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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