GS74117AX
8, 10, 12 ns
FP-BGA
256K x 16
3.3 V V
DD
Commercial Temp
Center V and V
DD SS
4Mb Asynchronous SRAM
Industrial Temp
Features Fine Pitch BGA 256K x 16 Bump Configuration
Fast access time: 8, 10, 12 ns
1 2 3 4 5 6
CMOS low power operation: 130/105/95 mA at minimum
cycle time
Single 3.3 V power supply
LB OE A0 A1 A2 NC
A
All inputs and outputs are TTL-compatible
Byte control
B DQ1 UB A3 A4 CE DQ16
Fully static operation
Industrial Temperature Option: 40 to 85C
C DQ3 DQ2 A5 A6 DQ15 DQ14
Package:
D VSS DQ4 A17 A7 DQ13 VDD
X: 6 mm x 10 mm Fine Pitch Ball Grid Array package
GX: Pb-Free 6 mm x 10 mm Fine Pitch Ball Grid Array
E VDD DQ5 NC A16 DQ12 VSS
package
F DQ6 DQ7 A8 A9 DQ10 DQ11
Description
G DQ8 NC A10 A11 WE DQ9
The GS74117A is a high speed CMOS Static RAM organized
as 262,144 words by 16 bits. Static design eliminates the need H NC A12 A13 A14 A15 NC
for external clocks or timing strobes. The GS operates on a
single 3.3 V power supply and all inputs and outputs are TTL-
compatible. The GS74117A is available in a 6 x 10 mm Fine
Package X
Pitch BGA package.
6 x 10 mm Substrate
Top View
Pin Descriptions
Symbol Description
A0A17 Address input
DQ1DQ16 Data input/output
CE Chip enable input
Lower byte enable input
LB
(DQ1 to DQ8)
Upper byte enable input
UB
(DQ9 to DQ16)
WE Write enable input
OE Output enable input
V
+3.3 V power supply
DD
V
Ground
SS
NC No connect
Rev: 1.05b 6/2010 1/12 2001, GSI Technology
Specifications cited are subject to change without notice. For latest documentation see GS74117AX
Block Diagram
A0
Row Memory Array
Decoder
Address
Input
Buffer
Column
Decoder
A17
CE
WE
I/O Buffer
Control
OE
_____
UB
DQ1 DQ16
Truth Table
CE OE WE LB UB DQ1 to DQ8 DQ9 to DQ16 VDD Current
H X X X X Not Selected Not Selected ISB1, ISB2
L L Read Read
L L H L H Read High Z
H L High Z Read
L L Write Write
IDD
L X L L H Write Not Write, High Z
H L Not Write, High Z Write
L H H X X High Z High Z
L X X H H High Z High Z
X: H or L
Rev: 1.05b 6/2010 2/12 2001, GSI Technology
Specifications cited are subject to change without notice. For latest documentation see