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Cypress Semiconductor Electronic Components Datasheet

CY7C168A Datasheet

4Kx4 RAM

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CY7C168A
Features
• Automatic power-down when deselected
• CMOS for optimum speed/power
• High speed
— tAA = 15 ns
• Low active power
— 633 mW
• Low standby power
— 110 mW
• TTL-compatible inputs and outputs
• VIH of 2.2V
• Capable of withstanding greater than 2001V electrostat-
ic discharge
4Kx4 RAM
Functional Description
The CY7C168A is a high-performance CMOS static RAM or-
ganized as 4096 by 4 bits. Easy memory expansion is provided
by an active LOW Chip Enable (CE) and three-state drivers.
The CY7C168A has an automatic power-down feature, reduc-
ing the power consumption by 77% when deselected.
Writing to the device is accomplished when the Chip Select
(CE) and Write Enable (WE) inputs are both LOW. Data on the
four data input/output pins (I/O0 through I/O3) is written into the
memory location specified on the address pins (A0 through
A11).
Reading the device is accomplished by taking the Chip Enable
(CE) LOW, while Write Enable (WE) remains HIGH. Under
these conditions, the contents of the location specified on the
address pins will appear on the four data input/output pins
(I/O0 through I/O3).
The input/output pins remain in a high-impedance state when
Chip Enable (CE) is HIGH or Write Enable (WE) is LOW.
A die coat is used to insure alpha immunity.
Logic Block Diagram
INPUTBUFFER
A0
A1
A2
A3
128 x 128
ARRAY
A4
A5
A6
COLUMN
DECODER
POWER
DOWN
(7C168A)
A7 A8 A9A10 A11
I/O0
I/O1
I/O2
I/O3
CE
WE
C168A-1
Pin Configurations
A4
A5
A6
A7
A8
A9
A10
A11
CE
GND
DIP/SOJ
Top View
1 20
2 19
3 18
4 17
5 7C168A 16
6\
15
7 14
8 13
9 12
10 11
VCC
A3
A2
A1
A0
I/O 0
I/O 1
I/O 2
I/O 3
WE
C168A-2
Selection Guide
Maximum Access Time (ns)
Maximum Operating
Current (mA)
Commercial
Military
7C168A-15
15
115
-
7C168A-20
20
90
100
7C168A-25
25
90
100
7C168A-35
35
90
100
7C168A-45
45
90
100
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
February 3, 2000


Cypress Semiconductor Electronic Components Datasheet

CY7C168A Datasheet

4Kx4 RAM

No Preview Available !

CY7C168A
Maximum Ratings
(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
(Pin 20 to Pin 10)................................................ −0.5V to +7.0V
DC Voltage Applied to Outputs
in High Z State .................................................... −0.5V to +7.0V
DC Input Voltage .................................................−3.0V to +7.0V
Electrical Characteristics Over the Operating Range[2]
Output Current into Outputs (Low) .............................. 20 mA
Static Discharge Voltage ........................................... >2001V
(per MIL-STD-883, Method 3015)
Latch-Up Current ..................................................... >200 mA
Operating Range
Range
Ambient
Temperature
Commercial
Military[1]
0°C to +70°C
55°C to +125°C
VCC
5V ± 10%
5V ± 10%
7C168A-15
Parameter
Description
Test Conditions
Min. Max.
VOH
Output HIGH Voltage
VCC = Min., IOH = 4.0 mA
VOL
Output LOW Voltage
VCC = Min., IOL = 8.0 mA
VIH Input HIGH Voltage
VIL Input LOW Voltage[3]
IIX
Input Load Current
GND < VI < VCC
IOZ Output Leakage GND < VO < VCC,
Current
Output Disabled
2.4
0.4
2.2
0.5
VCC
0.8
10 +10
10 +10
IOS
Output Short
Circuit Current[4]
VCC = Max., VOUT = GND
350
ICC VCC Operating
Supply Current
VCC = Max.,
IOUT = 0 mA
Coml
Mil
115
-
ISB1 Automatic CE
Max. VCC,
Power-Down Current
CE > VIH
Coml
Mil
40
-
ISB2 Automatic CE
Max. VCC,
Coml
Power-Down Current
CE > VCC 0.3V
Mil
20
-
Notes:
1. TA is the instant oncase temperature.
2. See the last page of this specification for Group A subgroup testing information.
3. VIL min. = 3.0V for pulse durations less than 30 ns.
4. Not more than 1 output should be shorted at one time. Duration of the short circuit should not exceed 30 seconds.
7C168A-20
Min. Max.
2.4
0.4
2.2
0.5
VCC
0.8
10 +10
10 +10
350
90
100
40
40
20
20
Unit
V
V
V
V
µA
µA
mA
mA
mA
mA
2


Part Number CY7C168A
Description 4Kx4 RAM
Maker Cypress Semiconductor
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