Cypress CY7C128A-45DMB 2k x 8 static ram Datasheet

1CY 7C12 8A
CY7C128A
2K x 8 Static RAM
Features
Functional Description
• Automatic power-down when deselected
• CMOS for optimum speed/power
• High speed
— 15 ns
• Low active power
— 440 mW (commercial)
— 550 mW (military)
• Low standby power
— 110 mW
• TTL-compatible inputs and outputs
• Capable of withstanding greater than 2001V electrostatic discharge
• VIH of 2.2V
The CY7C128A is a high-performance CMOS static RAM organized as 2048 words by 8 bits. Easy memory expansion is
provided by an active LOW chip enable (CE), and active LOW
output enable (OE) and three-state drivers. The CY7C128A
has an automatic power-down feature, reducing the power
consumption by 83% when deselected.
Writing to the device is accomplished when the chip enable
(CE) and write enable (WE) inputs are both LOW.
Data on the eight I/O pins (I/O0 through I/O7) is written into the
memory location specified on the address pins (A0 through
A10).
Reading the device is accomplished by taking chip enable
(CE) and output enable (OE) LOW while write enable (WE) remains
HIGH. Under these conditions, the contents of the memory location
specified on the address pins will appear on the eight I/O pins.
The I/O pins remain in high-impedance state when chip enable
(CE) or output enable (OE) is HIGH or write enable (WE) is LOW.
The CY7C128A utilizes a die coat to insure alpha immunity.
Pin Configurations
Logic Block Diagram
DIP/SOJ
Top View
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
I/O0
INPUT BUFFER
I/O1
A10
A9
1
24
23
2
22
3
4
21
5
20
6
19
7C128A
18
7
17
8
9
16
10
15
11
14
12
13
I/O2
A8
A7
C128A–2
LCC
Top View
I/O3
128 x 16 x 8
ARRAY
A6
A5
A4
VCC
A8
A9
WE
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
I/O4
I/O5
CE
WE
I/O6
POWER
DOWN
COLUMN
DECODER
A4
A3
A2
A1
A0
I/O0
I/O1
I/O7
OE
A3
A2
A1
3 2 1 24 23
4
22
5
21
6
20
7 7C128A 19
8
18
9
17
10
16
11 12 13 14 15
A0
A9
WE
OE
A10
CE
I/O7
I/O6
C128A–3
C128A–1
Selection Guide
7C128A–15
15
120
Maximum Access Time (ns)
Maximum Operating
Current (mA)
Maximum Standby
Current (mA)
Commercial
Military
Commercial
Military
Cypress Semiconductor Corporation
40/40
•
7C128A–20
20
100
125
40/20
40/20
3901 North First Street
•
7C128A–25
25
100
125
20
40
7C128A–35
35
100
100
20
20
7C128A–45
45
100
20
San Jose
• CA 95134 •
408-943-2600
December 1988 – Revised December 1992
CY7C128A
Maximum Ratings
Output Current into Outputs (LOW)............................. 20 mA
(Above which the useful life may be impaired. For user guidelines, not tested.)
Static Discharge Voltage .......................................... >2001V
(per MIL-STD-883, Method 3015)
Storage Temperature ................................. –65°C to +150°C
Latch-Up Current .................................................... >200 mA
Ambient Temperature with
Power Applied............................................. –55°C to +125°C
Operating Range
Supply Voltage to Ground Potential
(Pin 28 to Pin 14) ........................................... –0.5V to +7.0V
Range
Ambient
Temperature
VCC
DC Voltage Applied to Outputs
in High Z State ............................................... –0.5V to +7.0V
Commercial
0°C to +70°C
5V ± 10%
DC Input Voltage............................................ –3.0V to +7.0V
Military[1]
–55°C to +125°C
5V ± 10%
Electrical Characteristics Over the Operating Range[2]
7C128A–15 7C128A–20 7C128A–25 7C128A–35,45
Parameter
Description
Test Conditions
Min.
Max.
Min.
Max.
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
2.2
VCC
2.2
VCC
2.2
VCC
VIL
Input LOW
Voltage[3]
–0.5
0.8
–0.5
0.8
–0.5
IIX
Input Load
Current
GND < VI < VCC
–10
+10
–10
+10
IOZ
Output Leakage
Current
GND < VI < VCC
Output Disabled
–10
+10
–10
+10
IOS
Output Short
Circuit Current[4]
VCC = Max.,
VOUT = GND
ICC
VCC Operating
Supply Current
VCC = Max.
IOUT = 0 mA
Com’l
ISB1
Automatic CE
Power-Down
Current
Max. VCC,
CE > VIH,
Min. Duty Cycle
= 100%
Com’l
Automatic CE
Power-Down
Current
Max. VCC,
CE1 >VCC–0.3V,
VIN > VCC–0.3V
or VIN < 0.3V
Com’l
ISB2
2.4
2.4
2.4
0.4
0.4
Min.
Max.
2.4
0.4
V
0.4
V
2.2
VCC
V
0.8
–0.5
0.8
V
–10
+10
–10
+10
µA
–10
+10
–10
+10
µA
–300
–300
–300
–300
mA
120
100
100
100
mA
125
125
100
40
20
20
40
40
20
20
20
20
20
20
20
Mil
40
Mil
40
Mil
mA
mA
Capacitance[5]
Parameter
CIN
Description
Input Capacitance
COUT
Output Capacitance
Test Conditions
TA = 25°C, f = 1 MHz,
VCC = 5.0V
Notes:
1. TA is the “instant on” case 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.
5. Tested initially and after any design or process changes that may affect these parameters.
2
Unit
Max.
10
Unit
pF
10
pF
CY7C128A
AC Test Loads and Waveforms
R1 481Ω
5V
R1 481Ω
5V
OUTPUT
ALL INPUT PULSES
OUTPUT
R2
255 Ω
30 pF
INCLUDING
JIG AND
SCOPE
3.0V
R2
255 Ω
5 pF
INCLUDING
JIG AND
SCOPE
(a)
GND
90%
10%
90%
10%
≤ 5 ns
≤ 5 ns
(b)
C128A–5
C128A–4
Equivalent to:
THÉVENIN EQUIVALENT
OUTPUT
167Ω
1.73V
Switching Characteristics Over the Operating Range[2,6]
Parameter
Description
7C128A–15
7C128A–20
7C128A–25
7C128A–35
7C128A–45
Min.
Min.
Min.
Min.
Min.
Max.
Max.
Max.
Max.
Max.
Unit
READ CYCLE
tRC
Read Cycle Time
15
tAA
Address to Data Valid
tOHA
Data Hold from Address Change
tACE
CE LOW to Data Valid
15
20
25
35
45
ns
tDOE
OE LOW to Data Valid
10
10
12
15
20
ns
15
ns
tLZOE
OE LOW to Low Z
tHZOE
OE HIGH to High Z[7]
tLZCE
CE LOW to Low Z[8]
15
CE HIGH to High
tPU
CE LOW to Power-Up
tPD
CE HIGH to Power-Down
25
20
5
5
3
25
5
8
0
0
20
ns
5
15
ns
15
ns
25
ns
0
20
ns
ns
3
5
0
20
45
12
10
ns
5
3
5
0
15
35
10
8
45
5
3
8
5
35
5
3
8
Z[7,8]
tHZCE
20
ns
WRITE CYCLE[9]
tWC
Write Cycle Time
15
20
20
25
40
ns
tSCE
CE LOW to Write End
12
15
20
25
30
ns
tAW
Address Set-Up to Write End
12
15
20
25
30
ns
tHA
Address Hold from Write End
0
0
0
0
0
ns
tSA
Address Set-Up to Write Start
0
0
0
0
0
ns
tPWE
WE Pulse Width
12
15
15
20
20
ns
tSD
Data Set-Up to Write End
10
10
10
15
15
ns
tHD
Data Hold from Write End
0
0
0
0
0
ns
Z[7]
tHZWE
WE LOW to High
tLZWE
WE HIGH to Low Z
7
7
5
5
7
5
10
5
15
5
ns
ns
Notes:
6. Test conditions assume signal transition time of 5 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output loading of the specified
IOL/IOH and 30-pF load capacitance.
7. tHZOE, tHZCE, and tHZWE are specified with CL = 5 pF as in part (b) of AC Test Loads. Transition is measured ±500 mV from steady state voltage.
8. At any given temperature and voltage condition, tHZCE is less than tLZCE for any given device.
9. The internal write time of the memory is defined by the overlap of CE LOW and WE LOW. Both signals must be LOW to initiate a write and either signal can terminate
a write by going HIGH. The data input set-up and hold timing should be referenced to the rising edge of the signal that terminates the write.
3
CY7C128A
Switching Waveforms
Read Cycle No. 1[10,11]
tRC
ADDRESS
tOHA
DATA OUT
tAA
PREVIOUS DATA VALID
DATA VALID
C128A–6
Read Cycle No. 2[10,12]
tRC
CE
tACE
OE
tHZOE
tHZCE
tDOE
DATA OUT
tLZOE
HIGH IMPEDANCE
HIGH
IMPEDANCE
DATA VALID
tLZCE
VCC
SUPPLY
CURRENT
tPD
tPU
ICC
50%
50%
ISB
C128A–7
Write Cycle No. 1 (WE
Controlled)[9,13]
tWC
ADDRESS
tSCE
CE
tSA
tAW
tHA
tPWE
WE
tSD
DATAIN VALID
DATA IN
tHZWE
DATA I/O
tHD
tLZWE
HIGH IMPEDANCE
DATA UNDEFINED
C128A–8
Notes:
10. WE is HIGH for read cycle.
11. Device is continuously selected. OE, CE = VIL.
12. Address valid prior to or coincident with CE transition LOW.
13. Data I/O pins enter high-impedance state, as shown, when OE is held LOW during write.
4
CY7C128A
Switching Waveforms (continued)
Write Cycle No. 2 (CE Controlled)[9,13,14]
tWC
ADDRESS
tSA
tSCE
CE
tAW
tHA
tPWE
WE
tHD
tSD
DATA IN VALID
DATA IN
tHZWE
HIGH IMPEDANCE
DATA I/O
DATA UNDEFINED
C128A–9
Notes:
14. If CE goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state.
Typical DC and AC Characteristics
1.4
120
1.2
1.2
1.0
100
ICC
ICC
1.0
OUTPUT SOURCE CURRENT
vs. OUTPUT VOLTAGE
NORMALIZED SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
NORMALIZED SUPPLY CURRENT
vs. SUPPLY VOLTAGE
0.8
80
0.6
60
0.8
0.6
0.4
0.4
0.0
4.0
4.5
5.0
5.5
6.0
40
VCC =5.0V
VIN =5.0V
0.2
ISB
0.2
20
ISB
0.0
–55
25
125
0
0.0
AMBIENT TEMPERATURE(°C)
SUPPLY VOLTAGE(V)
1.4
1.6
1.3
1.4
1.0
2.0
3.0
4.0
OUTPUT VOLTAGE(V)
NORMALIZED ACCESS TIME
vs. AMBIENT TEMPERATURE
NORMALIZED ACCESS TIME
vs. SUPPLY VOLTAGE
OUTPUT SINK CURRENT
vs. OUTPUT VOLTAGE
140
120
100
1.2
1.2
TA =25°C
60
1.0
VCC =5.0V
1.0
40
0.8
0.9
4.5
5.0
5.5
SUPPLY VOLTAGE(V)
6.0
0.6
–55
VCC =5.0V
TA =25°C
80
1.1
0.8
4.0
VCC =5.0V
TA =25°C)
20
25
125
AMBIENT TEMPERATURE(°C)
5
0
0.0
1.0
2.0
3.0
OUTPUT VOLTAGE(V)
4.0
CY7C128A
Typical DC and AC Characteristics (continued)
TYPICAL POWER-ON CURRENT
vs. SUPPLY VOLTAGE
TYPICAL ACCESS TIME CHANGE
vs. OUTPUT LOADING
NORMALIZED I CC
vs. CYCLE TIME
3.0
30.0
1.4
2.5
25.0
1.3
2.0
20.0
1.2
1.5
15.0
1.1
1.0
10.0
0.5
5.0
0.0
0.0
1.0
2.0
3.0
4.0
5.0
0.0
SUPPLY VOLTAGE(V)
VCC =4.5V
TA =25°C
0
200
400
600
800 1000
VCC =5.0V
TA =25°C
VIN =0.5V
1.0
0.9
0.8
0
CAPACITANCE(pF)
10
Ordering Information
Speed
(ns)
15
20
25
35
45
Ordering Code
CY7C128A–15PC
CY7C128A–15VC
CY7C128A–20PC
CY7C128A–20VC
CY7C128A–20DMB
CY7C128A–20LMB
CY7C128A–25PC
CY7C128A–25VC
CY7C128A–25DMB
CY7C128A–25LMB
CY7C128A–35PC
CY7C128A–35VC
CY7C128A–35DMB
CY7C128A–35LMB
CY7C128A–45DMB
CY7C128A–45LMB
Package
Name
P13
V13
P13
V13
D14
L53
P13
V13
D14
L53
P13
V13
D14
L53
D14
L53
Package Type
24-Lead (300-Mil) Molded DIP
24-Lead Molded SOJ
24-Lead (300-Mil) Molded DIP
24-Lead Molded SOJ
24-Lead (300-Mil) CerDIP
24-Pin Rectangular Leadless Chip
24-Lead (300-Mil) Molded DIP
24-Lead Molded SOJ
24-Lead (300-Mil) CerDIP
24-Pin Rectangular Leadless Chip
24-Lead (300-Mil) Molded DIP
24-Lead Molded SOJ
24-Lead (300-Mil) CerDIP
24-Pin Rectangular Leadless Chip
24-Lead (300-Mil) CerDIP
24-Pin Rectangular Leadless Chip
6
20
30
CYCLE FREQUENCY(MHz)
Operating
Range
Commercial
Commercial
Military
Carrier
Commercial
Military
Carrier
Commercial
Military
Carrier
Military
Carrier
40
CY7C128A
MILITARY SPECIFICATIONS
Group A Subgroup Testing
DC Characteristics
Parameter
VOH
VOL
VIH
VIL Max.
IIX
IOZ
ICC
ISB
Subgroups
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Switching Characteristics
Parameter
READ CYCLE
tRC
tAA
tOHA
tACE
tDOE
WRITE CYCLE
tWC
tSCE
tAW
tHA
tSA
tPWE
tSD
tHD
Subgroups
7, 8,
7, 8,
7, 8,
7, 8,
7, 8,
9,
9,
9,
9,
9,
10, 11
10, 11
10, 11
10, 11
10, 11
7, 8,
7, 8,
7, 8,
7, 8,
7, 8,
7, 8,
7, 8,
7, 8,
9,
9,
9,
9,
9,
9,
9,
9,
10, 11
10, 11
10, 11
10, 11
10, 11
10, 11
10, 11
10, 11
Document #: 38–00094–B
7
CY7C128A
Package Diagrams
24-Lead (300-Mil) CerDIP D14
24-Pin Rectangular Leadless Chip Carrier L53
MIL–STD–1835 D– 9 Config.A
24-Lead (300-Mil) Molded DIP P13/P13A
8
CY7C128A
Package Diagrams (continued)
24-Lead Molded SOJ V13
© Cypress Semiconductor Corporation, 1993. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize
its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress
Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.
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