gvt72256a16 ETC-unknow, gvt72256a16 Datasheet - Page 3

• Manufacturer Part Number: gvt72256a16
• Description: Revolutionary Pinout 256k
• Manufacturer: ETC-unknow

TRUTH TABLE
PIN DESCRIPTIONS
January 23, 1997
Rev. 1/97
GALVANTECH
LOW BYTE READ (DQ1-DQ8)
HIGH BYTE READ (DQ9-DQ16)
WORD READ (DQ1-DQ16)
LOW BYTE WRITE (DQ1-DQ8)
HIGH BYTE WRITE (DQ9-DQ16)
WORD WRITE (DQ1-DQ16)
OUTPUT DISABLE
STANDBY
1, 2, 3, 4, 5, 18, 19,
20, 21, 22, 23, 24,
25, 26, 27, 42, 43, 44
MODE
7, 8, 9, 10, 13, 14,
15, 16, 29, 30, 31,
32, 35, 36, 37, 38
Pin Numbers
SOJ & TSOP
39, 40
11, 33
12, 34
17
41
6
BLE#, BHE#
DQ1-DQ16
SYMBOL
A0-A17
WE#
VCC
CE#
OE#
VSS
Input/Output SRAM Data I/O: Data inputs and data outputs. Lower byte is DQ1-DQ8 and upper byte is
Supply
Supply
TYPE
Input
Input
Input
Input
Input
CE#
H
L
L
L
L
L
L
L
L
, INC.
Addresses Inputs: These inputs determine which cell is addressed.
Write Enable: This input determines if the cycle is a READ or WRITE cycle. WE# is LOW
for a WRITE cycle and HIGH for a READ cycle.
Chip Enable: This active LOW input is used to enable the device. When CE# is LOW, the
chip is selected. When CE# is HIGH, the chip is disabled and automatically goes into
standby power mode.
Byte Enable: These active LOW inputs allow individual bytes to be written or read. When
BLE# is LOW, the data is written to or read from the lower byte (DQ1-DQ8). When BHE# is
LOW, the data is written to or read from the higher byte (DQ9-DQ16).
Output Enable: This active LOW input enables the output drivers.
DQ9-DQ16.
Power Supply: 5V
Ground
WE#
H
H
H
X
H
X
L
L
L
OE#
H
L
L
L
X
X
X
X
X
REVOLUTIONARY PINOUT 256K X 16
+
3
10%
BLE#
H
H
H
X
X
L
L
L
L
DESCRIPTION
BHE#
H
H
H
X
X
L
L
L
L
Galvantech, Inc. reserves the right to change products or specifications without notice.
ADVANCE INFORMATION
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
DQ1-
DQ8
Q
Q
D
D
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
DQ16
GVT72256A16
DQ9-
Q
Q
D
D
STANDBY
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
POWER