HM5164165 Series - 64M-bit Dynamic RAM

Overview

The Hitachi HM5164165F Series and HM5165165F Series are high-performance 64M-bit dynamic RAMs (DRAMs) organized as 4,194,304-word × 16-bit memory arrays. These devices leverage advanced CMOS process technology to achieve both high performance and low power consumption. The HM5164165F Series is designed for applications requiring efficient memory solutions with Extended Data Out (EDO) Page Mode for high-speed access. The series is available in two package variations: a standard 50-pin plastic Small Outline J-lead (SOJ) and a 50-pin plastic Thin Small Outline Package II (TSOPII).

Features

• Single 3.3V Power Supply: Operates at 3.3V ± 0.3V, making it suitable for low-voltage applications.
• High-Speed Access: Maximum access times of 50 ns and 60 ns.
• Low Power Consumption:
  • Active Mode: 432 mW (max) for HM5164165F Series; 504 mW (max) for HM5165165F Series.
  • Standby Mode: 1.8 mW (max) with CMOS interface; 1.1 mW (max) for L-version.
• EDO Page Mode: Enables faster data access by allowing consecutive reads/writes within the same page.
• Multiple Refresh Modes:
  • RAS-only refresh
  • CAS-before-RAS refresh (CBR)
  • Hidden refresh
  • Self-refresh (L-version only)
• Refresh Cycles:
  • RAS-only Refresh: 8192 cycles/64 ms (HM5164165F, HM5164165FL); 4096 cycles/64 ms (HM5165165F, HM5165165FL).
  • CBR/Hidden Refresh: 4096 cycles/64 ms for all variants.
• 2CAS-Byte Control: Allows for flexible byte-wise data access.
• Battery Backup Operation: Supported in L-version for low-power applications.

Applications

The HM5164165F Series is ideal for a variety of applications requiring high-density, low-power memory solutions. Key applications include:

• Computing Systems: Used in desktops, laptops, and servers for temporary data storage.
• Embedded Systems: Suitable for industrial control systems, medical devices, and automotive electronics.
• Consumer Electronics: Found in gaming consoles, digital TVs, and set-top boxes.
• Networking Equipment: Utilized in routers, switches, and communication infrastructure.
• Battery-Powered Devices: The L-version is particularly suited for portable electronics due to its low standby power consumption.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_CC): -0.5V to +4.6V
• Input Voltage (V_IN): -0.5V to V_CC + 0.5V
• Operating Temperature Range: 0°C to +70°C (commercial grade)
• Storage Temperature Range: -55°C to +125°C

Recommended Operating Conditions

• Supply Voltage (V_CC): 3.3V ± 0.3V
• Input High Voltage (V_IH): 2.0V min
• Input Low Voltage (V_IL): 0.8V max
• Operating Temperature: 0°C to +70°C

DC Characteristics

• Input Leakage Current (I_IN): ±1 µA max
• Output Leakage Current (I_OUT): ±1 µA max
• Standby Current (I_SB): 1.8 mW max (CMOS interface); 1.1 mW max (L-version)

Package Information

The HM5164165F Series is available in two package options:

• 50-Pin Plastic SOJ (Small Outline J-Lead):
  • Package Dimensions: 20.95 mm × 10.16 mm × 3.81 mm (typical)
  • Pin Pitch: 1.27 mm
• 50-Pin Plastic TSOPII (Thin Small Outline Package II):
  • Package Dimensions: 22.22 mm × 10.16 mm × 1.2 mm (typical)
  • Pin Pitch: 0.8 mm

Pin Configuration

The 50-pin configuration includes:

• Address Inputs (A0-A11): 12-bit address bus for row and column addressing.
• Data Input/Output (DQ0-DQ15): 16-bit bidirectional data bus.
• Control Signals: Includes /RAS (Row Address Strobe), /CAS (Column Address Strobe), /WE (Write Enable), and /OE (Output Enable).
• Power and Ground: V_CC (3.3V supply) and V_SS (ground).

Ordering Information

The HM5164165F Series offers multiple variants based on speed, power, and package type. Below is a summary of available part numbers:

• HM5164165F-50: 50 ns access time, standard power.
• HM5164165F-60: 60 ns access time, standard power.
• HM5164165FL-50: 50 ns access time, low-power (L-version).
• HM5164165FL-60: 60 ns access time, low-power (L-version).

Similar variants exist for the HM5165165F Series with differing refresh cycle requirements.

Conclusion

The HM5164165F Series and HM5165165F Series from Hitachi provide a robust, high-performance memory solution for a wide range of applications. With features like EDO Page Mode, multiple refresh options, and low power consumption, these DRAMs are well-suited for both high-speed computing and battery-operated devices. The availability of SOJ and TSOPII packages ensures compatibility with various PCB designs, making them a versatile choice for engineers and designers.