Preliminary
GS8152Z18/36/72B-225/200/180/166/150/133
119 and 209 BGA
Commercial Temp 16Mb Pipelined and Flow Through 225MHz–133MHz
3.3 V V
DD
Industrial Temp
Synchronous NBT SRAM
2.5 V or 3.3 V I/O
Features
Functional Description
• 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
• 3.3 V +10%/–5% core power supply
• 2.5 V or 3.3 V I/O supply
The GS8152Z18/36/72B is a 16Mbit 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.
• User-configurable Pipeline and Flow Through mode
• ZQ mode pin for user-selectable high/low output drive
• IEEE 1149.1 JTAG-compatible Boundary Scan
• On-chip write parity checking; even or odd selectable
• On-chip parity encoding and error detection
• LBO pin for Linear or Interleave Burst mode
• Pin-compatible with 2M, 4M, and 8M devices
• Byte write operation (9-bit Bytes)
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
rail for proper operation. Asynchronous inputs include the
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.
• 3 chip enable signals for easy depth expansion
• ZZ Pin for automatic power-down
• JEDEC-standard 119- or 209-Bump BGA package
-225 -200 -180 -166 -150 -133 Unit
The GS8152Z18/36/72B may be configured by the user to
operate in Pipeline or Flow Through mode. Operating as a
pipelined synchronous device, 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.
Flow
tKQ
7.0 7.5 8.0 8.5 10.0 11.0 ns
8.5 10.0 10.0 10.0 10.0 15.0 ns
205 185 185 185 185 140 mA
240 210 210 210 210 160 mA
325 285 285 285 285 205 mA
Through
2-1-1-1
tCycle
Curr (x18)
Curr (x36)
Curr (x72)
Pipeline
3-1-1-1
tKQ
tCycle
2.5 3.0 3.2 3.5 3.8 4.0 ns
4.4 5.0 5.5 6.0 6.7 7.5 ns
350 315 290 270 250 230 mA
410 370 340 315 290 260 mA
570 515 470 435 400 360 mA
Curr (x18)
Curr (x36)
Curr (x72)
The GS8152Z18/36/72B is implemented with GSI's high
performance CMOS technology and is available in a JEDEC-
Standard 119-bump (x18 & x36) or 209-bump (x72) BGA
package.
Flow Through and Pipelined NBT SRAM Back-to-Back Read/Write Cycles
Clock
Address
A
R
B
C
R
D
E
R
F
Read/Write
W
W
W
Flow Through
Data I/O
QA
DB
QC
DD
QE
Pipelined
Data I/O
QA
DB
QC
DD
QE
Rev: 1.01 11/2000
1/39
© 2000, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
NoBL is a trademark of Cypress Semiconductor Corp.. NtRAM is a trademark of Samsung Electronics Co.. ZBT is a trademark of Integrated Device Technology, Inc.