GVT72256A16TS-12 Cypress Semiconductor Corp, GVT72256A16TS-12 Datasheet - Page 3

• Manufacturer Part Number: GVT72256A16TS-12
• Manufacturer: Cypress Semiconductor Corp

Specifications of GVT72256A16TS-12

• Density: 4Mb
• Access Time (max): 12ns
• Sync/async: Asynchronous
• Architecture: Not Required
• Clock Freq (max): Not RequiredMHz
• Operating Supply Voltage (typ): 5V
• Address Bus: 18b
• Package Type: TSOP-II
• Operating Temp Range: 0C to 70C
• Number Of Ports: 1
• Supply Current: 190mA
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 44
• Word Size: 16b
• Number Of Words: 256K
• Lead Free Status / Rohs Status: Not Compliant

TRUTH TABLE
PIN DESCRIPTION S
July 22, 199 9
Rev. 7/99
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
MOD E
7, 8, 9, 10, 13, 14,
15, 16, 29, 30, 31,
32, 35, 36, 37, 38
Pin Number s
SOJ & TSOP
GALVANTECH
39, 40
11, 33
12, 34
17
41
6
BLE#, BHE#
DQ1-DQ16
SYMBO L
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
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
DESCRIPTIO N
BHE#
H
H
H
X
X
L
L
L
L
Galvantech, Inc. reserves the right to change products or specifications without notice
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
POWE R
.