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TC55257BFL-85 from TOSH,TOSHIBA

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TC55257BFL-85

Manufacturer: TOSH, TOS, TOSHIBA

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

Partnumber Manufacturer Quantity Availability
TC55257BFL-85,TC55257BFL85 TOSH, TOS, TOSHIBA 7081 In Stock

Description and Introduction

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

### **Specifications:**
- **Organization:** 32K x 8  
- **Technology:** CMOS  
- **Access Time:** 85 ns  
- **Operating Voltage:** 5V ±10%  
- **Operating Temperature Range:** Commercial (0°C to +70°C)  
- **Package Type:** 28-pin Plastic SOP (Small Outline Package)  
- **Pin Count:** 28  
- **Standby Current (Typical):** 10 µA (CMOS standby)  
- **Operating Current (Typical):** 40 mA (at 85 ns access time)  
- **Data Retention Voltage:** 2V (min)  
- **Tri-State Outputs:** Yes  

### **Descriptions:**
- The TC55257BFL-85 is a high-speed, low-power static RAM designed for applications requiring fast access times and low power consumption.  
- It is compatible with TTL levels and features a fully static operation, eliminating the need for external clocks or refresh cycles.  
- The device is suitable for battery-backed or low-power systems due to its CMOS technology.  

### **Features:**
- **High-Speed Access:** 85 ns maximum access time.  
- **Low Power Consumption:**  
  - Active current: 40 mA (typical)  
  - Standby current: 10 µA (typical, CMOS level)  
- **Wide Operating Voltage Range:** 4.5V to 5.5V.  
- **Fully Static Operation:** No refresh required.  
- **TTL-Compatible Inputs/Outputs.**  
- **Single 5V Supply Operation.**  
- **Three-State Outputs for Bus Compatibility.**  
- **Industrial Standard Pinout (JEDEC Approved).**  

This SRAM is commonly used in embedded systems, industrial controls, telecommunications, and other applications requiring fast and reliable memory.

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 5V interface and pinout, widely available and often used as a drop-in replacement for Toshiba 32Kx8 SRAMs.
  • CY62256NLL-70PXC --: 32K x 8 asynchronous SRAM with compatible organization and access time class, commonly cross-referenced for TC55257 series devices.
  • AS6C62256-55PCN --: 32K x 8 low-power SRAM designed as a direct replacement for legacy 62256-type parts, matching the TC55257BFL organization and 5V operation.

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