GS880Z18/32/36CT-xxxIV
250 MHz–150 MHz
9Mb Pipelined and Flow Through
Synchronous NBT SRAM
100-Pin TQFP
Industrial Temp
1.8 V or 2.5 V V
DD
1.8 V or 2.5 V I/O
rail for proper operation. Asynchronous inputs include the
Features
Sleep mode enable (ZZ) and Output Enable. Output Enable can
be used to override the synchronous control of the output
drivers and turn the RAM's output drivers off at any time.
Write cycles are internally self-timed and initiated by the rising
edge of the clock input. This feature eliminates complex off-
chip write pulse generation required by asynchronous SRAMs
and simplifies input signal timing.
• NBT (No Bus Turn Around) functionality allows zero wait
read-write-read bus utilization; Fully pin-compatible with
both pipelined and flow through NtRAM™, NoBL™ and
ZBT™ SRAMs
• 1.8 V or 2.5 V +10%/–10% core power supply
• 1.8 V or 2.5 V I/O supply
• User-configurable Pipeline and Flow Through mode
• LBO pin for Linear or Interleave Burst mode
• Pin compatible with 2M, 4M, and 18M devices
• Byte write operation (9-bit Bytes)
• 3 chip enable signals for easy depth expansion
• ZZ Pin for automatic power-down
The GS880Z18/32/36CT-xxxIV may be configured by the
user to operate in Pipeline or Flow Through mode. Operating
as a pipelined synchronous device, meaning that in addition to
the rising edge triggered registers that capture input signals, the
device incorporates a rising-edge-triggered output register. For
read cycles, pipelined SRAM output data is temporarily stored
by the edge triggered output register during the access cycle
and then released to the output drivers at the next rising edge of
clock.
• JEDEC-standard 100-lead TQFP package
• RoHS-compliant 100-lead TQFP package available
Functional Description
The GS880Z18/32/36CT-xxxIV is a 9Mbit Synchronous Static
SRAM. GSI's NBT SRAMs, like ZBT, NtRAM, NoBL or
other pipelined read/double late write or flow through read/
single late write SRAMs, allow utilization of all available bus
bandwidth by eliminating the need to insert deselect cycles
when the device is switched from read to write cycles.
The GS880Z18/32/36CT-xxxIV is implemented with GSI's
high performance CMOS technology and is available in a
JEDEC-standard 100-pin TQFP package.
Because it is a synchronous device, address, data inputs, and
read/ write control inputs are captured on the rising edge of the
input clock. Burst order control (LBO) must be tied to a power
Parameter Synopsis
-250I
-200I
-150I
Unit
tKQ
3.0
4.0
3.0
5.0
3.8
6.7
ns
ns
tCycle
Pipeline
3-1-1-1
Curr (x18)
Curr (x32/x36)
195
220
170
185
145
165
mA
mA
tKQ
5.5
5.5
6.5
6.5
7.5
7.5
ns
ns
tCycle
Flow Through
2-1-1-1
Curr (x18)
Curr (x32/x36)
155
175
135
160
133
145
mA
mA
Rev: 1.04 6/2012
1/23
© 2011, GSI Technology
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.