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SMJ27C256-20JM from TI,Texas Instruments

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SMJ27C256-20JM

Manufacturer: TI, ASI, TI/ST

256K UVEPROM
Partnumber Manufacturer Quantity Availability
SMJ27C256-20JM,SMJ27C25620JM TI, ASI, TI/ST 3149 In Stock

Description and Introduction

256K UVEPROM The SMJ27C256-20JM is a 256K (32K x 8) UV erasable programmable read-only memory (EPROM) manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Memory Size:** 256Kbit (32K x 8)  
- **Access Time:** 200 ns (20 in the part number indicates speed grade)  
- **Supply Voltage:** 5V ±10%  
- **Operating Current:** 30 mA (typical)  
- **Standby Current:** 100 µA (typical)  
- **Technology:** CMOS  
- **Package:** 28-pin PLCC (Plastic Leaded Chip Carrier)  
- **Data Retention:** >10 years  
- **Programming Voltage:** 12.5V (VPP)  
- **Operating Temperature Range:** Commercial (0°C to +70°C)  

### **Features:**  
- **UV Erasable:** Can be erased with ultraviolet light for reprogramming.  
- **Single 5V Supply:** Operates on a standard 5V power supply.  
- **Low Power Consumption:** CMOS technology ensures low power in active and standby modes.  
- **TTL-Compatible Inputs/Outputs:** Ensures compatibility with standard logic levels.  
- **Three-State Outputs:** Allows for bus sharing in microprocessor systems.  
- **JEDEC Approved:** Complies with industry-standard pinouts.  

### **Applications:**  
- Firmware storage in embedded systems  
- Microcontroller program memory  
- Legacy computing and industrial control systems  

This information is based solely on the manufacturer's specifications.

Application Scenarios & Design Considerations

256K UVEPROM

Alternative Part Number

  • M27C256B-20F1 --: 256Kbit (32K x 8) UV EPROM in a 28-pin DIP, 200 ns access time, pin-compatible with the SMJ27C256 and widely available as a drop-in replacement.
  • AM27C256-200DC --: 256Kbit CMOS EPROM with 200 ns access time in a 28-pin ceramic DIP, functionally and pin-compatible with the original device.
  • NMC27C256Q200 --: 256Kbit EPROM with 200 ns access time in a 28-pin package, offering equivalent density, speed, and pinout for direct substitution.
  • NMC27C256Q-200 --: 256Kbit EPROM with 200ns speed grade, suitable drop-in alternative for the SMJ27C256-20JM.
  • AT27C256R-20PC --: Pin-compatible 256Kbit OTP EPROM with 200 ns speed and 28-pin DIP, suitable as a drop-in substitute with similar timing.
  • NM27C256Q200 --: Equivalent 256Kbit CMOS EPROM with 200 ns access time in a 28-pin DIP, matching the original density and speed grade.

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