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TC55257DFL-85L from TOSHIBA

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TC55257DFL-85L

Manufacturer: TOSHIBA, TOS, TOSH

32,768 WORD-8 BIT STATIC RAM

Partnumber Manufacturer Quantity Availability
TC55257DFL-85L,TC55257DFL85L TOSHIBA, TOS, TOSH 24837 In Stock

Description and Introduction

32,768 WORD-8 BIT STATIC RAM The TC55257DFL-85L is a static RAM (SRAM) chip manufactured by Toshiba. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:  

### **Specifications:**  
- **Type:** High-speed CMOS Static RAM (SRAM)  
- **Organization:** 32K x 8 bits (256Kbit)  
- **Operating Voltage:** 5V ±10%  
- **Access Time:** 85ns  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 28-pin SOP (Small Outline Package)  
- **I/O Interface:** TTL-compatible  
- **Standby Current (Typical):** 10µA (CMOS standby mode)  
- **Operating Current (Typical):** 40mA (at 85ns access time)  

### **Descriptions:**  
- The TC55257DFL-85L is a low-power, high-speed CMOS SRAM designed for applications requiring fast data access and low power consumption.  
- It features a fully static operation, meaning no refresh cycles are required.  
- The chip is suitable for battery-backed or power-sensitive applications due to its low standby current.  

### **Features:**  
- **High-Speed Access:** 85ns maximum access time.  
- **Low Power Consumption:** CMOS technology ensures low active and standby power.  
- **Wide Operating Voltage:** Supports 5V ±10%.  
- **Fully Static Operation:** No clock or refresh required.  
- **TTL-Compatible Inputs/Outputs:** Ensures compatibility with standard logic levels.  
- **Three-State Outputs:** Allows for bus-oriented applications.  
- **Industrial Temperature Range:** Operates reliably from -40°C to +85°C.  

This information is based solely on the manufacturer's specifications for the TC55257DFL-85L SRAM chip.

Application Scenarios & Design Considerations

32,768 WORD-8 BIT STATIC RAM

Alternative Part Number

  • IS62C256AL-45ULI --: 32K x 8 low-power CMOS SRAM with similar 85ns-class access time and pin-compatible DIP/SOP footprint, widely available and often used as a drop-in replacement for Toshiba 32Kx8 SRAMs.
  • AS6C62256-55PCN --: 32K x 8 low-power SRAM in the same JEDEC pinout, 55ns speed meets or exceeds the 85ns requirement, and Alliance Memory specializes in legacy SRAM replacements for discontinued Toshiba parts.
  • CY62256NLL-70PXC --: Industry-standard 32K x 8 low-power SRAM with compatible pinout and 70ns access time, a common second-source option when the original Toshiba TC55257 series is unavailable.

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