CXRS3134C is the JTM-IC high-performance contact smart card reader IC designed for payment systems, identification and networking devices. The chip supports 5V/3V/1.8V multi-voltage power supply, integrates DC-DC converter, provides 65mA continuous output current (5V/3V) and 35mA(1.8V), and has perfect short circuit protection, ESD protection (>8kV) and thermal shutdown functions.
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[ CXRS3134C ]"
CXRS3134C Smart Card Reader ICs: A Technical Explanation and Application Guide
Product overview
CXRS3134C is the JTM-IC high-performance contact smart card reader IC designed for payment systems, identification and networking devices. The chip supports5V/3V/1.8V multi-voltage supply, integrated DC-DC converter, provides65mA Continuous Output Current（5V/3V）和35mA（1.8V）and has perfect short-circuit protection, ESD protection (>8kV) and thermal shutdown function. Its core strengths include:
- Wide voltage input: 2.7V-5.5V working range, compatible with USB and fire cow adapter.
- Triple protection mechanismShort circuit detection (125mA filter threshold), card pull-out detection, undervoltage lockout (UVLO).
- Low power design: The quiescent current is only 0.1 μA in deep shutdown mode.
Core Features
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High security design
- Complies with ISO 7816, EMV 4.3 and NDS standards for payment terminals and authentication devices.
- Integrated DC-DC converter, support 5V/3V/1.8V card power supply, voltage accuracy ± 5%.
- Automatic activation/deactivation sequence to prevent power fluctuations from damaging the smart card.
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Multiple protection functions
- ESD protectionCard interface pin withstand voltage ± 8kV(HBM model).
- Thermal protection: Automatic shutdown when junction temperature exceeds 150°C.
- Short circuit protectionSupports 40nA/s transient current pulses (5V/3V) and 15nA/s(1.8V).
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Compact package and ease of use
- HVQFN32 package(5mm × 5mm), built-in heat dissipation pad, & theta;JA = 55 K/W (with heat dissipation holes).
- Only 6 capacitors (including 2 × 220nF VCC decoupling capacitors) are needed in the periphery to support 33kHz-20MHz external clock input.
Typical Application Circuit
- Power Management：VDDP（2.7V-5.5V）→ DC-DC转换器 → VCC（5V/3V/1.8V）
- Card InterfaceIntegrated buffered I/O lines (C4/C7/C8) supporting 1.5MHz data transfer rate.
- Status indication: Output fault signal (short circuit/overheat/undervoltage) through the OFFN pin.
Design Considerations
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PCB Layout Optimization
- VCC decoupling capacitor needs to be close to the chip pin, ESR<100mΩ.
- XTAL1/XTAL2 traces away from high-frequency noise sources, and 56pF capacitors are recommended in series.
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Thermal Management
- It is recommended to use 4 heat dissipation vias to connect the bottom pad of the HVQFN32 to reduce thermal resistance.
Industry Application Scenarios
- Electronic Payment: POS terminal, bank card reader.
- Identity Authentication: Access control system, electronic passport reading.
- IoT SecuritySIM card interface module.
Why choose JTM-IC?
As a professional IC supplier, JTM-IC (official website:jtm-ic.com) provides:
- Full range of EMV compliant productsSupport fast customer authentication.
- Reference design and technical support to shorten the time to market.
