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TC55257BFL-85L from TOSHIBA

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TC55257BFL-85L

Manufacturer: TOSHIBA, TOS

SILICON GATE CMOS 32,768 WORD X 8 BIT STATIC RAM

Partnumber Manufacturer Quantity Availability
TC55257BFL-85L,TC55257BFL85L TOSHIBA, TOS 2638 In Stock

Description and Introduction

SILICON GATE CMOS 32,768 WORD X 8 BIT STATIC RAM The TC55257BFL-85L is a 256K (32K x 8) high-speed CMOS static RAM manufactured by Toshiba. Below are its key specifications, descriptions, and features:  

### **Specifications:**  
- **Organization:** 32K x 8 bits  
- **Operating Voltage:** 5V ±10%  
- **Access Time:** 85 ns  
- **Operating Current:** 40 mA (max)  
- **Standby Current:** 10 µA (max, CMOS level)  
- **Package:** 28-pin SOP (Small Outline Package)  
- **Operating Temperature Range:** 0°C to +70°C  
- **Tri-State Outputs:** Yes  
- **Data Retention Voltage:** 2V (min)  

### **Descriptions:**  
- The TC55257BFL-85L is a low-power, high-performance CMOS SRAM.  
- It is designed for applications requiring fast access times and low power consumption.  
- The device features a fully static operation, meaning no clock or refresh is required.  
- It is compatible with TTL levels for easy interfacing.  

### **Features:**  
- **High-Speed Access:** 85 ns maximum access time.  
- **Low Power Consumption:**  
  - Active current: 40 mA (max)  
  - Standby current: 10 µA (max, CMOS level)  
- **Wide Voltage Range:** Operates at 4.5V to 5.5V.  
- **Fully Static Operation:** No refresh cycles required.  
- **TTL-Compatible Inputs/Outputs:** Easy integration with TTL logic.  
- **Tri-State Outputs:** Allows bus sharing in multi-device systems.  
- **Data Retention Mode:** Maintains data with minimal power (2V min).  

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

Application Scenarios & Design Considerations

SILICON GATE CMOS 32,768 WORD X 8 BIT STATIC RAM

Alternative Part Number

  • IS62C256AL-45ULI --: 32K x 8 low-power CMOS SRAM with similar asynchronous parallel interface and 5V-compatible operation, commonly used as a drop-in replacement for Toshiba 32Kx8 SRAMs.
  • AS6C62256-55PCN --: 32K x 8 low-power SRAM in a 28-pin DIP/TSOP package, functionally equivalent to the TC55257 series with comparable access time and pinout.
  • CY62256NLL-70PXC --: 32K x 8 low-power asynchronous SRAM with industry-standard pinout, widely available and suitable as a functional substitute for the TC55257BFL.

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