JP-7941W2 RFID Card Reader Module, 3.3‑5.5V Power Supply, Max 5cm Reading

Product Specification

JP-7941W2 Card Reader Module

Product Overview

     The JP-7941W2 Card Reader Module is a highly integrated 13.56MHz RFID/NFC reader module supporting ISO14443 Type-A and Type-B standard cards, including S50, S70, FM11RF08, UltraLight, Ntag, FM1208, and second-generation ID cards. Built around an advanced read-write RF base station with a built-in watchdog and integrated antenna design, this module offers comprehensive command-based card operations — automatic detection, read, write, e-wallet initialization, value increment, value decrement, and balance inquiry, enabling straightforward card management without complex protocol implementation. The module provides flexible UART and RS232 serial interfaces, operates from 3.3V to 5.5V with peak current under 60mA, and delivers a read range of up to 5cm. Housed in a compact 62mm × 30mm DIP form factor with integrated antenna, the JP-7941W2 is the ideal choice for access control terminals, smart payment systems, time attendance devices, and identity verification kiosks.

Key Advantages

• Comprehensive Command-Based Card Operations: Built-in command set supports automatic card detection, read, write, e-wallet initialization, value increment, value decrement, and balance inquiry — enabling direct, host-free card management without complex protocol stack implementation.

• All-in-One Integrated Antenna Design: Antenna is integrated into the module — no external antenna design, no tuning, no matching circuit development. Plug-and-play integration that reduces design time and engineering effort.

• Integrated Watchdog: Built-in hardware watchdog prevents system lock-ups — ensuring continuous, reliable operation in mission-critical access control and payment applications where downtime is unacceptable.

• Wide-Range Power Supply: Operates from 3.3V to 5.5V — compatible with both 3.3V embedded systems and 5V legacy controllers without level shifting or separate regulators.

• Broad Card Compatibility: Supports ISO14443 Type-A and Type-B cards, including S50, S70, FM11RF08, UltraLight, Ntag, FM1208, and second-generation ID cards — ensuring compatibility with a wide range of existing card systems.

• Ultra-Compact DIP Form Factor: 62mm × 30mm DIP package with integrated antenna — easy integration into PCB designs without requiring complex surface-mount assembly, ideal for prototyping and production.

Why Choose This Module?

• Built-In E-Wallet Commands for Payment Applications: Unlike basic reader modules that only provide raw card UID, the JP-7941W2 includes high-level e-wallet commands — value initialization, increment, decrement, and balance inquiry. This means developers can implement stored-value applications (such as canteen payments, laundry services, or transit cards) directly without writing complex crypto or memory management code. The built-in command set reduces development time, minimizes firmware bugs, and accelerates time-to-market for payment and access control products with stored-value requirements.

• Integrated Antenna and Watchdog — Plug and Play Reliability: The all-in-one antenna design eliminates the need for external antenna tuning, matching circuits, and RF layout expertise — common challenges with raw reader chips. This dramatically reduces design complexity and PCB area, and ensures consistent read performance across production batches. Combined with the built-in hardware watchdog, the JP-7941W2 is engineered for reliable 24/7 operation in critical deployments — automatically recovering from communication errors or temporary system hangs.

• Wide Voltage Tolerance Simplifies Power Design: The 3.3V–5.5V input range accommodates both modern 3.3V embedded processors and legacy 5V systems. OEMs using the JP-7941W2 can standardize on one module across different product lines without separate power supply designs or level shifters. This simplifies BOM management and reduces the risk of power-related integration issues.

• Ultra-Compact, Through-Hole Package for Easy Assembly: The 62mm × 30mm DIP form factor is designed for straightforward through-hole assembly — ideal for manufacturing environments that may not have surface-mount capabilities or for quick prototyping. The integrated antenna means all RF components are on-board, eliminating the need for external antennas, additional RF connectors, or complex EMI shielding. This reduces assembly time, simplifies testing, and lowers overall production costs.

• Built for Government and Enterprise Applications: With ISO14443 Type-B support for second-generation ID cards, the JP-7941W2 is ready for government and enterprise identity verification systems. This makes it the ideal choice for system integrators building solutions for public sector, healthcare, and financial applications where national ID card reading is a requirement.