HM5165165 Series 64M-bit Dynamic RAM

Overview

The Hitachi HM5164165F and HM5165165F Series are high-performance, low-power 64M-bit dynamic RAMs (DRAMs) organized as 4,194,304-word × 16-bit memory arrays. These devices are fabricated using advanced CMOS process technology, ensuring efficient operation with minimal power consumption. The series supports Extended Data Out (EDO) Page Mode for high-speed access, making them suitable for applications requiring rapid data retrieval. The HM5165165F Series is available in standard 50-pin plastic SOJ (Small Outline J-lead) and TSOPII (Thin Small Outline Package) configurations, providing flexibility for various design requirements.

Features

• Single 3.3V Power Supply: Operates at 3.3V ± 0.3V, making it compatible with modern low-voltage systems.
• High-Speed Access: Maximum access times of 50 ns or 60 ns, depending on the variant.
• Low Power Consumption:
  • Active Mode: Maximum power dissipation of 432 mW (HM5164165F Series) or 504 mW (HM5165165F Series).
  • Standby Mode: Maximum standby power of 1.8 mW (CMOS interface) or 1.1 mW (L-version).
• EDO Page Mode: Enables faster data access by allowing consecutive reads within the same page without repeated row addressing.
• Multiple Refresh Options:
  • RAS-only refresh: 8192 cycles/64 ms (HM5164165F, HM5164165FL) or 4096 cycles/64 ms (HM5165165F, HM5165165FL).
  • CAS-before-RAS (CBR) refresh and Hidden refresh: 4096 cycles/64 ms for all variants.
  • Self-refresh (L-version only): Ideal for battery-backed applications.
• 2CAS-Byte Control: Allows for flexible byte-wise data access and control.
• Battery Backup Operation: Supported in L-version variants for low-power retention during standby.

Applications

The HM5165165F Series is designed for a wide range of applications, including but not limited to:

• Computing Systems: Suitable for use in desktops, laptops, and servers where high-speed memory access is critical.
• Embedded Systems: Ideal for industrial control systems, medical devices, and automotive electronics requiring reliable memory solutions.
• Networking Equipment: Used in routers, switches, and other networking hardware for efficient data buffering and storage.
• Consumer Electronics: Applicable in gaming consoles, digital TVs, and set-top boxes for multimedia processing.
• Battery-Powered Devices: The L-version variants are particularly suited for portable devices due to their low standby power consumption and battery backup capabilities.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (VCC): -0.5V to +4.6V
• Input Voltage (VI): -0.5V to VCC + 0.5V
• Operating Temperature Range (TA): 0°C to +70°C
• Storage Temperature Range (TSTG): -55°C to +125°C

Recommended Operating Conditions

• Supply Voltage (VCC): 3.3V ± 0.3V
• Input High Voltage (VIH): 2.0V min
• Input Low Voltage (VIL): 0.8V max
• Operating Temperature: Commercial (0°C to +70°C) or Industrial (-40°C to +85°C) options available.

DC Characteristics

• Input Leakage Current (II): ±1 µA max
• Output Leakage Current (IOZ): ±1 µA max
• Standby Current (ISB): 1.8 mW max (CMOS interface), 1.1 mW max (L-version)

AC Characteristics

• Access Time (tAA): 50 ns or 60 ns max, depending on variant.
• RAS Precharge Time (tRP): 20 ns min
• CAS Hold Time (tCH): 10 ns min
• Write Pulse Width (tWP): 20 ns min

Package Information

The HM5165165F Series is available in two industry-standard packages:

• 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):
  • Package Dimensions: 22.22 mm × 10.16 mm × 1.20 mm (typical)
  • Pin Pitch: 0.80 mm

Ordering Information

The HM5165165F Series offers multiple variants to suit different application requirements. Below is a summary of the available options:

• HM5164165F: Standard version with 8192 RAS-only refresh cycles.
• HM5164165FL: Low-power version with self-refresh capability.
• HM5165165F: Standard version with 4096 RAS-only refresh cycles.
• HM5165165FL: Low-power version with self-refresh capability.

Conclusion

The HM5165165F Series from Hitachi represents a robust and versatile solution for high-speed, low-power memory requirements in a variety of applications. With its advanced CMOS technology, multiple refresh options, and flexible packaging, this DRAM series is well-suited for modern electronic systems demanding reliable and efficient memory performance. Whether used in computing, embedded systems, or consumer electronics, the HM5165165F Series delivers the performance and power efficiency needed for today's demanding applications.