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TC55257DFL from TOSHIBA

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TC55257DFL

Manufacturer: TOSHIBA, TOS

32,768 WORD-8 BIT STATIC RAM
Partnumber Manufacturer Quantity Availability
TC55257DFL TOSHIBA, TOS 10226 In Stock

Description and Introduction

32,768 WORD-8 BIT STATIC RAM The TC55257DFL is a static RAM (SRAM) manufactured by Toshiba. Below are its specifications, descriptions, and features based on factual information:  

### **Specifications:**  
- **Type:** 32K x 8-bit CMOS Static RAM (SRAM)  
- **Organization:** 32,768 words × 8 bits  
- **Supply Voltage:** 5V ±10%  
- **Access Time:** Ranges from 55ns to 100ns (depending on the speed grade)  
- **Operating Current:** Typically 40mA (active), 10μA (standby)  
- **Package:** 28-pin SOP (Small Outline Package)  
- **Operating Temperature Range:** Commercial (0°C to +70°C) or Industrial (-40°C to +85°C)  
- **Data Retention Voltage:** 2V (min)  
- **Pin Configuration:** Compatible with industry-standard 32K x 8 SRAMs  

### **Descriptions:**  
- The TC55257DFL is a low-power CMOS SRAM designed for applications requiring fast access times and battery backup capability.  
- It features a fully static operation, meaning no refresh cycles are required.  
- The device is suitable for embedded systems, industrial controls, and battery-powered applications.  

### **Features:**  
- **Low Power Consumption:**  
  - Active current: 40mA (typical)  
  - Standby current: 10μA (typical)  
- **Wide Operating Voltage Range:** 4.5V to 5.5V  
- **Fully Static Operation:** No clock or refresh needed  
- **Tri-State Outputs:** Allows direct interfacing with common bus systems  
- **High-Speed Access:** 55ns, 70ns, and 100ns speed grades available  
- **Battery Backup Capability:** Data retention at reduced voltage (2V min)  
- **Industry-Standard Pinout:** Compatible with other 32K x 8 SRAMs  

This information is based on Toshiba's official documentation for the TC55257DFL SRAM.

Application Scenarios & Design Considerations

32,768 WORD-8 BIT STATIC RAM

Alternative Part Number

  • IS62C256AL-45U --: 32K x 8 low-power CMOS SRAM with comparable speed and pinout, widely available and a common drop-in replacement for Toshiba SRAMs.
  • AS6C62256-55PCN --: 32K x 8 asynchronous SRAM in a DIP package with similar timing and voltage, often used to replace legacy Toshiba SRAM parts.
  • CY62256NLL-70PXC --: 32K x 8 low-power SRAM with compatible organization and interface, suitable as a functional substitute when timing margin allows.
  • IS62C256AL --: 32K x 8 low-power CMOS SRAM with the same asynchronous parallel interface and 5V-compatible operation, a common drop-in replacement for the TC55257 series.
  • AS6C62256 --: 32K x 8 low-power SRAM pin-compatible with the TC55257 family, widely used as a direct substitute in legacy designs.
  • CY62256N --: 32K x 8 low-power CMOS SRAM with matching pinout and timing, a well-established alternative for the TC55257DFL.

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