CY7C1041AV33/
GVT73256A16
PRELIMINARY
2
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Voltage on VCC Supply Relative to VSS ......... –0.5V to +4.6V
VIN ...........................................................–0.5V to VCC+0.5V
Storage Temperature (plastic)........................–55°C to +125°
Junction Temperature ..................................................+125°
Power Dissipation ......................................................... 1.0W
Short Circuit Output Current ....................................... 50 mA
Note:
1.
TA is the “Instant On” case temperature.
Truth Table
Mode
CE
WE
OE
BLE
BHE
DQ1–D8
DQ9–D16
POWER
Low Byte Read (DQ1–DQ8)
L
H
L
L
H
Q
High-Z
Active
High Byte Read (DQ9–DQ16)L
H
L
H
L
High-Z
Q
Active
Word Read (DQ1–DQ16)
L
H
LLL
Q
Q
Active
Low Byte Write (DQ1–DQ8)
L
L
X
L
H
D
High-Z
Active
High Byte Write (DQ9–DQ16)L
L
X
H
L
High-Z
D
Active
Word Write (DQ1–DQ16)L
L
X
L
L
D
D
Active
Output Disable
L
X
X
H
H
High-Z
High-Z
Active
L
H
H
X
X
High-Z
High-Z
Active
Standby
H
X
X
X
X
High-Z
High-Z
Standby
Pin Descriptions
SOJ & TSOP
Pin Numbers
Pin Name
Type
Description
1, 2, 3, 4, 5, 18, 19,
20, 21, 22, 23, 24, 25,
26, 27, 42, 43, 44
A0–A17
Input
Addresses Inputs: These inputs determine which cell is addressed.
17
WE
Input
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.
6CE
Input
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 automati-
cally goes into standby power mode.
39, 40
BLE, BHE
Input
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).
41
OE
Input
Output Enable: This active LOW input enables the output drivers.
7, 8, 9, 10, 13, 14,
15, 16, 29, 30, 31, 32,
35, 36, 37, 38
DQ1–DQ16
Input/
Output
SRAM Data I/O: Data inputs and data outputs. Lower byte is DQ1–DQ8 and upper
byte is DQ9–DQ16.
11, 33
VCC
Supply
Power Supply: 3.3V ±0.3V%.
12, 34
VSS
Supply
Ground.
Operating Range
Range
Ambient
Temperature[1]
VCC
Commercial
0
°C to +70°C
3.3V
± 0.3V
Industrial
–40
°C to +85°C
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