参数资料
型号: GS8322ZV36B-133
厂商: GSI TECHNOLOGY
元件分类: DRAM
英文描述: 36Mb Pipelined and Flow Through Synchronous NBT SRAM
中文描述: 1M X 36 ZBT SRAM, 8.5 ns, PBGA119
封装: 14 X 22 MM, 1.27 PITCH, FPBGA-119
文件页数: 17/39页
文件大小: 975K
代理商: GS8322ZV36B-133
GS8322ZV18(B/E)/GS8322ZV36(B/E)/GS8322ZV72(C)
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Rev: 1.03a 2/2006
17/39
2002, GSI Technology
Sleep Mode
During normal operation, ZZ must be pulled low, either by the user or by its internal pull down resistor. When ZZ is pulled high,
the SRAM will enter a Power Sleep mode after 2 cycles. At this time, internal state of the SRAM is preserved. When ZZ returns to
low, the SRAM operates normally after 2 cycles of wake up time.
Sleep mode is a low current, power-down mode in which the device is deselected and current is reduced to I
SB
2. The duration of
Sleep mode is dictated by the length of time the ZZ is in a High state. After entering Sleep mode, all inputs except ZZ become
disabled and all outputs go to High-Z The ZZ pin is an asynchronous, active high input that causes the device to enter Sleep mode.
When the ZZ pin is driven high, I
SB
2 is guaranteed after the time tZZI is met. Because ZZ is an asynchronous input, pending
operations or operations in progress may not be properly completed if ZZ is asserted. Therefore, Sleep mode must not be initiated
until valid pending operations are completed. Similarly, when exiting Sleep mode during tZZR, only a Deselect or Read commands
may be applied while the SRAM is recovering from Sleep mode.
Sleep Mode Timing Diagram
tZZR
tZZH
tZZS
tKL
tKH
tKC
CK
ZZ
Designing for Compatibility
The GSI NBT SRAMs offer users a configurable selection between Flow Through mode and Pipeline mode via the FT signal. Not
all vendors offer this option, however most mark the pin V
DD
or V
DDQ
on pipelined parts and V
SS
on flow through parts. GSI NBT
SRAMs are fully compatible with these sockets. Other vendors mark the pin as a No Connect (NC). GSI RAMs have an internal
pull-up device on the FT pin so a floating FT pin will result in pipelined operation. If the part being replaced is a pipelined mode
part, the GSI RAM is fully compatible with these sockets. In the unlikely event the part being replaced is a Flow Through device,
the pin will need to be pulled low for correct operation.
相关PDF资料
PDF描述
GS8322ZV36B-133I 36Mb Pipelined and Flow Through Synchronous NBT SRAM
GS8322ZV36B-150 36Mb Pipelined and Flow Through Synchronous NBT SRAM
GS8322ZV36B-150I 36Mb Pipelined and Flow Through Synchronous NBT SRAM
GS8322ZV36B-166 36Mb Pipelined and Flow Through Synchronous NBT SRAM
GS8322ZV36B-166I 36Mb Pipelined and Flow Through Synchronous NBT SRAM
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