HM5425401B

Features:

• 2.5 V power supply
• SSTL-2 interface for all inputs and outputs
• Clock frequency: 143 MHz/133 MHz/125 MHz/100 MHz (max)
• Data inputs, outputs, and DM are synchronized with DQS
• 4 banks can operate simultaneously and independently
• Burst read/write operation
• Programmable burst length: 2/4/8
--Burst read stop capability
• Programmable burst sequence
--Sequential
--Interleave
• Start addressing capability
--Even and Odd
• Programmable CAS latency: 2/2.5
• 8192 refresh cycles: 7.8 s (64 ms/8192 cycles)
• 2 variations of refresh
--Auto refresh
--Self refresh


Pinout




Specifications

Parameter	Symbol	Value	Unit	Note
Supply voltage relative to VSS	VCC, VCCQ	1.0 to +3.6	V
Voltage on inputs pin relative to Vss	Vti	1.0 to +3.6	V
Voltage on I/O pins relative to VSS	VTio	0.5 to +3.6	V
Short circuit output current	Iout	50	mA
Power dissipation	PT	1.0	W
Operating temperature	Topr	0 to +70
Storage temperature	Tstg	-55 to +125

Description

The HM5425161B, the HM5425801B and the HM5425401B are the Double Data Rate (DDR) SDRAM devices. Read and write operations are performed at the cross points of the CLK and the CLK . This high speed data transfer is realized by the 2-bit prefetch piplined architecture. Data strobe (DQS) both for read and write are available for high speed and reliable data bus design. By setting extended mode resistor, the on-chip Delay Locked Loop (DLL) can be set enable or disable.