Hitachi HM6264BI 64k-bit Static RAM

Overview

The Hitachi HM6264BI is a high-performance 64k-bit static RAM organized as 8k-word × 8-bit. Manufactured using advanced 1.5 µm CMOS process technology, this component achieves a balance of high-speed operation and low power consumption. The device is available in two package options: a 450 mil SOP (Small Outline Package) with a fine pitch width and a 600 mil plastic DIP (Dual In-line Package), making it suitable for high-density applications. With its robust design and reliable performance, the HM6264BI is ideal for embedded systems, industrial controls, and battery-backed memory applications.

Features

• High-Speed Operation
  • Fast access time: 100/120 ns (max)
• Low Power Consumption
  • Standby power: 10 µW (typical)
  • Operating power: 15 mW (typical) at 1 MHz
• Single 5V Supply
  • Simplifies power management in embedded systems
• Completely Static Memory
  • No clock or timing strobe required for operation
• Equal Access and Cycle Times
  • Ensures consistent read/write performance
• Common Data Input and Output
  • Three-state output for bus compatibility
• Direct TTL Compatibility
  • All inputs and outputs are TTL-compatible
• Battery Backup Operation Capability
  • Supports low-power retention modes for critical data storage
• Wide Operating Temperature Range
  • -40°C to +85°C, suitable for industrial and automotive applications

Applications

The HM6264BI is designed for a broad range of applications, including:

• Embedded Systems
  • Microcontroller-based designs requiring fast, low-power SRAM
• Industrial Control Systems
  • Programmable logic controllers (PLCs) and automation equipment
• Battery-Backed Memory
  • Non-volatile storage solutions for real-time clocks and configuration data
• Telecommunications
  • Buffering and temporary storage in networking hardware
• Consumer Electronics
  • Gaming consoles, printers, and other devices requiring fast SRAM

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_CC): -0.3V to +7.0V
• Input Voltage (V_IN): -0.3V to V_CC + 0.3V
• Operating Temperature (T_OPR): -40°C to +85°C
• Storage Temperature (T_STG): -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (V_CC): 4.5V to 5.5V
• Input High Voltage (V_IH): 2.2V min
• Input Low Voltage (V_IL): 0.8V max
• Operating Temperature (T_OPR): -40°C to +85°C

DC Characteristics

• Standby Current (I_SB): 10 µA (typical) at V_CC = 5V
• Operating Current (I_CC): 15 mA (typical) at 1 MHz
• Output High Voltage (V_OH): 2.4V min at I_OH = -2.1 mA
• Output Low Voltage (V_OL): 0.4V max at I_OL = 2.1 mA

AC Characteristics

• Read Cycle Time (t_RC): 100/120 ns (max)
• Write Cycle Time (t_WC): 100/120 ns (max)
• Address Access Time (t_AA): 100/120 ns (max)
• Chip Enable Access Time (t_ACE): 100/120 ns (max)

Package Information

Available Packages

• 28-pin SOP (Small Outline Package)
  • 450 mil body width
  • Fine pitch for high-density PCB layouts
• 28-pin Plastic DIP (Dual In-line Package)
  • 600 mil width
  • Standard through-hole mounting

Package Dimensions

• SOP-28
  • Body width: 450 mil (11.43 mm)
  • Lead pitch: 1.27 mm
  • Height: 2.65 mm (max)
• DIP-28
  • Body width: 600 mil (15.24 mm)
  • Lead pitch: 2.54 mm
  • Height: 4.44 mm (max)

Ordering Information

The HM6264BI is available in multiple variants based on speed grade and package type. Below is the standard ordering information:

• HM6264BI-10: 100 ns access time, SOP-28
• HM6264BI-12: 120 ns access time, SOP-28
• HM6264BI-10P: 100 ns access time, DIP-28
• HM6264BI-12P: 120 ns access time, DIP-28