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TC55257DFTL-85L from TOSHIBA

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TC55257DFTL-85L

Manufacturer: TOSHIBA, TOS

32,768 WORD-8 BIT STATIC RAM

Partnumber Manufacturer Quantity Availability
TC55257DFTL-85L,TC55257DFTL85L TOSHIBA, TOS 1436 In Stock

Description and Introduction

32,768 WORD-8 BIT STATIC RAM The TC55257DFTL-85L is a high-speed CMOS static RAM (SRAM) manufactured by Toshiba. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**  
- **Density:** 262,144 bits (32K x 8-bit)  
- **Organization:** 32K words × 8 bits  
- **Access Time:** 85 ns  
- **Operating Voltage:** 5V ± 10%  
- **Package:** TSOP (Thin Small Outline Package)  
- **Operating Temperature Range:** Commercial (0°C to +70°C)  
- **Standby Current:** Low power consumption in standby mode  
- **I/O Interface:** Common I/O (input/output shared)  
- **Pin Count:** 28 pins  

### **Descriptions:**  
- The TC55257DFTL-85L is a high-performance CMOS static RAM designed for applications requiring fast access times and low power consumption.  
- It features a fully static operation, meaning no refresh cycles are required.  
- The device is compatible with TTL levels for easy interfacing with microprocessors and other logic circuits.  

### **Features:**  
- **High-Speed Operation:** 85 ns access time.  
- **Low Power Consumption:**  
  - Active current: 40 mA (typical)  
  - Standby current: 10 µA (typical)  
- **CMOS Technology:** Ensures low power dissipation.  
- **Single 5V Power Supply:** Simplifies system design.  
- **Tri-State Outputs:** Allows direct connection to a common bus.  
- **Data Retention:** Guaranteed in standby mode with reduced voltage (2V).  
- **Wide Operating Temperature Range:** Suitable for commercial applications.  

This information is based on the manufacturer's datasheet and technical documentation. For detailed electrical characteristics and timing diagrams, refer to the official Toshiba datasheet.

Application Scenarios & Design Considerations

32,768 WORD-8 BIT STATIC RAM

Alternative Part Number

  • IS62C256AL-45ULI --: 32K x 8 low-power CMOS SRAM with 45 ns access time, pin-compatible with the TC55257 series and widely available as a drop-in replacement.
  • AS6C62256-55PCN --: 32K x 8 low-power SRAM in a 28-pin DIP/SOP package with 55 ns access, functionally equivalent to the Toshiba TC55257DFTL and commonly used as a second source.
  • CY62256NLL-70PXC --: 32K x 8 low-power SRAM with 70 ns access time, same organization and pinout, suitable when slightly slower timing is acceptable.

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