1-Mword × 16-bit × 4-bank/2-Mword × 8-bit × 4-bank /4-Mword × 4-bit × 4-bank PC/133, PC/100 SDRAM

Description
The Hitachi HM5264165F is a 64-Mbit SDRAM organized as 1048576-word × 16-bit × 4 bank. The Hitachi HM5264805F is a 64-Mbit SDRAM organized as 2097152-word × 8-bit × 4 bank. The Hitachi HM5264405F is a 64-Mbit SDRAM organized as 4194304-word × 4-bit × 4 bank. All inputs and outputs are referred to the rising edge of the clock input. It is packaged in standard 54-pin plastic TSOP II.

FEATUREs
• 3.3 V power supply
• Clock frequency: 133 MHz/100 MHz (max)
• LVTTL interface
• Single pulsed RAS
• 4 banks can operate simultaneously and independently
• Burst read/write operation and burst read/single write operation capability
• Programmable burst length: 1/2/4/8/full page
• 2 variations of burst sequence
- Sequential (BL = 1/2/4/8/full page)
- Interleave (BL = 1/2/4/8)
• Programmable CAS latency: 2/3
• Byte control by DQM:DQM (HM5264805F/HM5264405F) DQMU/DQML (HM5264165F)
• Refresh cycles: 4096 refresh cycles/64 ms
• 2 variations of refresh
- Auto refresh
- Self refresh
• Full page burst length capability
- Sequential burst
- Burst stop capability