CY7C027/028
CY7C037/038
Document #: 38-06042 Rev. *A Page 4 of 19
Maximum Ratings
[8]
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature .................................–65
°C to +150°C
Ambient Temperature with
Power Applied.............................................–55
°C to +125°C
Supply Voltage to Ground Potential............... –0.3V to +7.0V
DC Voltage Applied to Outputs
in High Z State ............................................ –0.5V to +7.0DC
Input Voltage
[9]
...............................................–0.5V to +7.0V
Output Current into Outputs (LOW)............................. 20 mA
Static Discharge Voltage........................................... >1100V
Latch-Up Current.................................................... >200 mA
Note:
8. The Voltage on any input or I/O pin cannot exceed the power pin during power-up.
9. Pulse width < 20 ns.
10. Industrial parts are available in CY7C028 and CY7C038 only.
Pin Definitions
Left Port Right Port Description
CE
0L
, CE
1L
CE
0R
, CE
1R
Chip Enable (CE is LOW when CE
0
≤ V
IL
and CE
1
≥ V
IH
)
R/W
L
R/W
R
Read/Write Enable
OE
L
OE
R
Output Enable
A
0L
–A
15L
A
0R
–A
15R
Address (A
0
–A
14
for 32K; A
0
–A
15
for 64K devices)
I/O
0L
–I/O
17L
I/O
0R
–I/O
17R
Data Bus Input/Output (I/O
0
–I/O
15
for x16 devices; I/O
0
–I/O
17
for x18)
SEM
L
SEM
R
Semaphore Enable
UB
L
UB
R
Upper Byte Select (I/O
8
–I/O
15
for x16 devices; I/O
9
–I/O
17
for x18 devices)
LB
L
LB
R
Lower Byte Select (I/O
0
–I/O
7
for x16 devices; I/O
0
–I/O
8
for x18 devices)
INT
L
INT
R
Interrupt Flag
BUSY
L
BUSY
R
Busy Flag
M/S Master or Slave Select
V
CC
Power
GND Ground
NC No Connect
Operating Range
Range
Ambient
Temperature V
CC
Commercial 0°C to +70°C 5V ± 10%
Industrial
[10]
–40°C to +85°C 5V ± 10%
