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