Cypress CY7C1041-20ZC 256k x 16 static ram Datasheet

CY7C1041
256K x 16 Static RAM
Features
written into the location specified on the address pins (A0
through A17). If Byte High Enable (BHE) is LOW, then data
from I/O pins (I/O 8 through I/O15) is written into the location
specified on the address pins (A0 through A17).
• High speed
— tAA = 15 ns
• Low active power
— 1430 mW (max.)
• Low CMOS standby power (L version)
— 2.75 mW (max.)
• 2.0V Data Retention (400 µW at 2.0V retention)
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
• Easy memory expansion with CE and OE features
Reading from the device is accomplished by taking Chip Enable (CE) and Output Enable (OE) LOW while forcing the Write
Enable (WE) HIGH. If Byte Low Enable (BLE) is LOW, then
data from the memory location specified by the address pins
will appear on I/O0 to I/O 7. If Byte High Enable (BHE) is LOW,
then data from memory will appear on I/O 8 to I/O15. See the
truth table at the back of this data sheet for a complete description of read and write modes.
Functional Description
The CY7C1041 is a high-performance CMOS static RAM organized as 262,144 words by 16 bits.
Writing to the device is accomplished by taking Chip Enable
(CE) and Write Enable (WE) inputs LOW. If Byte Low Enable
(BLE) is LOW, then data from I/O pins (I/O0 through I/O 7), is
The input/output pins (I/O 0 through I/O15) are placed in a
high-impedance state when the device is deselected (CE
HIGH), the outputs are disabled (OE HIGH), the BHE and BLE
are disabled (BHE, BLE HIGH), or during a write operation (CE
LOW, and WE LOW).
The CY7C1041 is available in a standard 44-pin 400-mil-wide
body width SOJ and 44-pin TSOP II package with center power and ground (revolutionary) pinout.
Logic Block Diagram
Pin Configuration
SOJ
TSOP II
Top View
256K x 16
ARRAY
1024 x 4096
SENSE AMPS
A0
A1
A2
A3
A4
A5
A6
A7
A8
ROW DECODER
INPUT BUFFER
A0
A1
A2
A3
A4
CE
I/O0
I/O1
I/O2
I/O3
VCC
VSS
I/O4
I/O5
I/O6
I/O7
WE
A5
A6
A7
A8
A9
I/O0 – I/O7
I/O8 – I/O15
A9
A10
A 11
A 12
A 13
A14
A15
A16
A17
COLUMN
DECODER
BHE
WE
CE
OE
BLE
1041–1
1
44
2
3
43
42
4
41
40
39
38
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
A17
A16
A15
OE
BHE
BLE
I/O15
I/O14
I/O13
I/O12
VSS
VCC
I/O11
I/O10
I/O9
I/O8
NC
A14
A13
A12
A11
A10
1041–2
Selection Guide
7C1041-12
7C1041-15
7C1041-17
7C1041-20
7C1041-25
Maximum Access Time (ns)
12
15
17
20
25
Maximum Operating Current (mA)
280
260
250
230
220
3
3
3
3
3
0.5
0.5
0.5
0.5
0.5
6
6
6
6
6
Maximum CMOS Standby Current Com’l
(mA)
Com’l
L
Ind’l
Shaded areas contain preliminary information.
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
•
CA 95134
•
408-943-2600
October 4, 1999
CY7C1041
DC Input Voltage[1] ................................ –0.5V to VCC + 0.5V
Maximum Ratings
Current into Outputs (LOW)......................................... 20 mA
(Above which the useful life may be impaired. For user guidelines, not tested.)
Operating Range
Storage Temperature ................................. –65°C to +150°C
Ambient Temperature with
Power Applied ............................................. –55°C to +125°C
Range
Supply Voltage on VCC to Relative GND[1] .... –0.5V to +7.0V
Commercial
Industrial
DC Voltage Applied to Outputs
in High Z State[1] ....................................–0.5V to VCC + 0.5V
Ambient
Temperature[2]
VCC
0°C to +70°C
5V ± 0.5
–40°C to +85°C
Electrical Characteristics Over the Operating Range
7C1041-12
Parameter
Description
Test Conditions
Min.
VCC = Min., IOH = –4.0 mA
VCC = Min., IOL = 8.0 mA
Max.
2.4
7C1041-15
Min.
Max.
VOH
Output HIGH Voltage
2.4
VOL
Output LOW Voltage
VIH
Input HIGH Voltage
2.2
VCC
+ 0.5
2.2
VCC
+ 0.5
VIL
Input LOW Voltage[1]
–0.5
0.8
–0.5
0.4
7C1041-17
Min.
Max.
2.4
0.4
Unit
V
0.4
V
2.2
VCC
+ 0.5
V
0.8
–0.5
0.8
V
IIX
Input Load Current
GND < VI < VCC
–1
+1
–1
+1
–1
+1
µA
IOZ
Output Leakage
Current
GND < VOUT < VCC,
Output Disabled
–1
+1
–1
+1
–1
+1
µA
ICC
VCC Operating
Supply Current
VCC = Max.,
f = fMAX = 1/tRC
280
260
250
mA
ISB1
Automatic CE
Power-Down Current
—TTL Inputs
Max. V CC, CE > VIH
VIN > V IH or
VIN < V IL, f = fMAX
40
40
40
mA
ISB2
Automatic CE
Power-Down Current
—CMOS Inputs
Max. V CC,
CE > V CC – 0.3V,
VIN > V CC – 0.3V,
or V IN < 0.3V, f = 0
Com’l
Com’l
Ind’l
Shaded areas contain preliminary information.
Notes:
1. VIL (min.) = –2.0V for pulse durations of less than 20 ns.
2. TA is the case temperature.
2
L
3
3
3
mA
0.5
0.5
0.5
mA
6
6
6
mA
CY7C1041
Electrical Characteristics Over the Operating Range (continued)
Test Conditions
Parameter
7C1041-20
Description
Min.
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[1]
IIX
Input Load Current
GND < VI < VCC
IOZ
Output Leakage
Current
GND < VOUT < VCC,
Output Disabled
ICC
VCC Operating
Supply Current
VCC = Max.,
f = fMAX = 1/tRC
ISB1
Automatic CE
Power-Down Current
—TTL Inputs
Max. VCC, CE > VIH
VIN > VIH or
VIN < VIL, f = fMAX
ISB2
Automatic CE
Power-Down Current
—CMOS Inputs
Max. VCC,
CE > VCC – 0.3V,
VIN > VCC – 0.3V,
or VIN < 0.3V, f = 0
Min.
2.4
Max.
Unit
0.4
V
V
2.4
0.4
V
2.2
VCC
+ 0.5
2.2
VCC + 0.5
–0.5
0.8
–0.5
0.8
V
–1
+1
–1
+1
µA
–1
+1
–1
+1
µA
230
220
mA
40
40
mA
3
3
mA
0.5
0.5
mA
6
6
mA
Com’l
Com’l
7C1041-25
Max.
L
Ind’l
Capacitance[3]
Parameter
Description
CIN
Input Capacitance
COUT
I/O Capacitance
Test Conditions
Max.
Unit
8
pF
8
pF
TA = 25°C, f = 1 MHz,
VCC = 5.0V
Note:
3. Tested initially and after any design or process changes that may affect these parameters.
AC Test Loads and Waveforms
R1 481Ω
5V
R1 481 Ω
5V
OUTPUT
ALL INPUT PULSES
3.0V
90%
OUTPUT
30 pF
INCLUDING
JIG AND
SCOPE
(a)
R2
255Ω
R2
255Ω
5 pF
INCLUDING
JIG AND
SCOPE
(b)
GND
≤ 3 ns
10%
90%
10%
≤ 3 ns
1041–3
1041–4
THÉVENIN EQUIVALENT
167Ω
1.73V
OUTPUT
Equivalent to:
3
CY7C1041
Switching Characteristics[4] Over the Operating Range
7C1041-12
Parameter
Description
Min.
Max.
7C1041-15
Min.
Max.
7C1041-17
Min.
Max.
Unit
READ CYCLE
tRC
Read Cycle Time
tAA
Address to Data Valid
tOHA
Data Hold from Address Change
tACE
CE LOW to Data Valid
12
tDOE
OE LOW to Data Valid
6
tLZOE
OE LOW to Low Z
12
15
12
3
tHZOE
OE HIGH to High Z
tLZCE
CE LOW to Low Z[6]
6
CE HIGH to High Z
tPU
CE LOW to Power-Up
ns
15
17
ns
7
7
ns
3
0
ns
0
7
3
6
ns
17
0
3
[5, 6]
tHZCE
15
3
0
[5, 6]
17
ns
7
3
7
0
ns
ns
7
0
ns
ns
tPD
CE HIGH to Power-Down
12
15
17
ns
tDBE
Byte Enable to Data Valid
6
7
7
ns
tLZBE
Byte Enable to Low Z
tHZBE
Byte Disable to High Z
WRITE CYCLE
0
0
6
0
7
ns
7
ns
[7, 8]
tWC
Write Cycle Time
12
15
17
ns
tSCE
CE LOW to Write End
10
12
14
ns
tAW
Address Set-Up to Write End
10
12
14
ns
tHA
Address Hold from Write End
0
0
0
ns
tSA
Address Set-Up to Write Start
0
0
0
ns
tPWE
WE Pulse Width
10
12
14
ns
tSD
Data Set-Up to Write End
7
8
8
ns
tHD
Data Hold from Write End
0
0
0
ns
tLZWE
WE HIGH to Low Z[6]
3
3
3
ns
[5, 6]
tHZWE
WE LOW to High Z
tBW
Byte Enable to End of Write
6
10
7
12
7
12
ns
ns
Shaded areas contain preliminary information.
Notes:
4. Test conditions assume signal transition time of 3 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.
5. tHZOE, tHZCE, and tHZWE are specified with a load capacitance of 5 pF as in part (b) of AC Test Loads. Transition is measured ±500 mV from steady-state voltage.
6. At any given temperature and voltage condition, t HZCE is less than tLZCE, tHZOE is less than tLZOE, and tHZWE is less than tLZWE for any given device.
7. The internal write time of the memory is defined by the overlap of CE LOW, and WE LOW. CE and WE must be LOW to initiate a write, and the transition of either of
these signals can terminate the write. The input data set-up and hold timing should be referenced to the leading edge of the signal that terminates the write.
8. The minimum write cycle time for Write Cycle No. 3 (WE controlled, OE LOW) is the sum of tHZWE and tSD.
4
CY7C1041
Switching Characteristics[4] Over the Operating Range (continued)
7C1041-20
Parameter
Description
Min.
7C1041-25
Max.
Min.
Max.
Unit
READ CYCLE
tRC
Read Cycle Time
20
tAA
Address to Data Valid
tOHA
Data Hold from Address Change
tACE
CE LOW to Data Valid
tDOE
OE LOW to Data Valid
tLZOE
OE LOW to Low Z
25
20
25
ns
20
25
ns
8
10
ns
3
5
0
[5, 6]
tHZOE
OE HIGH to High Z
tLZCE
CE LOW to Low Z[6]
tHZCE
CE HIGH to High Z
ns
0
8
ns
10
3
[5, 6]
ns
5
8
ns
ns
10
ns
tPU
CE LOW to Power-Up
tPD
CE HIGH to Power-Down
20
25
ns
tDBE
Byte Enable to Data Valid
8
10
ns
tLZBE
Byte Enable to Low Z
tHZBE
Byte Disable to High Z
0
0
0
ns
0
8
ns
10
ns
WRITE CYCLE[7, 8]
tWC
Write Cycle Time
20
25
ns
tSCE
CE LOW to Write End
13
15
ns
tAW
Address Set-Up to Write End
13
15
ns
tHA
Address Hold from Write End
0
0
ns
tSA
Address Set-Up to Write Start
0
0
ns
tPWE
WE Pulse Width
13
15
ns
tSD
Data Set-Up to Write End
9
10
ns
tHD
Data Hold from Write End
0
0
ns
[6]
tLZWE
WE HIGH to Low Z
tHZWE
WE LOW to High Z[5, 6]
tBW
Byte Enable to End of Write
3
5
8
ns
10
13
15
ns
ns
Data Retention Characteristics Over the Operating Range
Parameter
Conditions[10]
Description
VDR
VCC for Data Retention
ICCDR
Data Retention Current
Min.
Max.
2.0
Com’l L
Unit
V
µA
VCC = VDR = 2.0V,
CE > VCC – 0.3V,
VIN > VCC – 0.3V or VIN < 0.3V
200
µA
µA
tCDR[3]
Chip Deselect to Data Retention Time
tR[9]
Operation Recovery Time
0
ns
See Note 9
Notes:
9. t r < 100 µs for all speeds.
10. No input may exceed VCC + 0.5V.
5
CY7C1041
Data Retention Waveform
DATA RETENTION MODE
3.0V
VCC
VDR > 2V
3.0V
tR
tCDR
CE
1041–5
Switching Waveforms
Read Cycle No.1
[11, 12]
tRC
ADDRESS
tAA
tOHA
DATA OUT
PREVIOUS DATA VALID
DATA VALID
1041-6
Read Cycle No.2 (OE Controlled)
[12, 13]
ADDRESS
tRC
CE
tACE
OE
tHZOE
tDOE
BHE, BLE
tLZOE
tHZCE
tDBE
tLZBE
DATA OUT
tHZBE
HIGH IMPEDANCE
DATA VALID
tLZCE
V CC
SUPPLY
CURRENT
HIGH
IMPEDANCE
tPD
tPU
IICC
CC
50%
50%
IISB
SB
1041-7
Notes:
11. Device is continuously selected. OE, CE, BHE, and/or BHE = VIL.
12. WE is HIGH for read cycle.
13. Address valid prior to or coincident with CE transition LOW.
6
CY7C1041
Switching Waveforms (continued)
Write Cycle No. 1 (CE Controlled)
[14, 15]
tWC
ADDRESS
CE
tSA
tSCE
tAW
tHA
tPWE
WE
tBW
BHE, BLE
tSD
tHD
DATAI/O
1041-8
Write Cycle No. 2 (BLE or BHE Controlled)
tWC
ADDRESS
BHE, BLE
tSA
tBW
tAW
tHA
tPWE
WE
tSCE
CE
tSD
tHD
DATAI/O
1041-9
Notes:
14. Data I/O is high impedance if OE or BHE and/or BLE= VIH.
15. If CE goes HIGH simultaneously with WE going HIGH, the output remains in a high-impedance state.
7
CY7C1041
Switching Waveforms (continued)
Write Cycle No. 3 (WE Controlled, LOW)
tWC
ADDRESS
tSCE
CE
tAW
tHA
tSA
tPWE
WE
tBW
BHE, BLE
tHZWE
tSD
tHD
DATA I/O
tLZWE
1041-10
Truth Table
CE
OE
WE
BLE
BHE
I/O0–I/O7
I/O8–I/O15
H
X
X
X
X
High Z
High Z
Power Down
Standby (ISB)
L
L
H
L
L
Data Out
Data Out
Read All Bits
Active (ICC)
L
L
H
L
H
Data Out
High Z
Read Lower Bits Only
Active (ICC)
L
L
H
H
L
High Z
Data Out
Read Upper Bits Only
Active (ICC)
L
X
L
L
L
Data In
Data In
Write All Bits
Active (ICC)
L
X
L
L
H
Data In
High Z
Write Lower Bits Only
Active (ICC)
L
X
L
H
L
High Z
Data In
Write Upper Bits Only
Active (ICC)
L
H
H
X
X
High Z
High Z
Selected, Outputs Disabled
Active (ICC)
8
Mode
Power
CY7C1041
Ordering Information
Speed
(ns)
15
17
20
25
15
17
20
25
Ordering Code
Package
Name
Package Type
CY7C1041-15VC
V34
44-Lead (400-Mil) Molded SOJ
CY7C1041L-15VC
V34
44-Lead (400-Mil) Molded SOJ
CY7C1041-15ZC
Z44
44-Lead TSOP Type II
CY7C1041L-15ZC
Z44
44-Lead TSOP Type II
CY7C1041-17VC
V34
44-Lead (400-Mil) Molded SOJ
CY7C1041L-17VC
V34
44-Lead (400-Mil) Molded SOJ
CY7C1041-17ZC
Z44
44-Lead TSOP Type II
CY7C1041L-17ZC
Z44
44-Lead TSOP Type II
CY7C1041-20VC
V34
44-Lead (400-Mil) Molded SOJ
CY7C1041L-20VC
V34
44-Lead (400-Mil) Molded SOJ
CY7C1041-20ZC
Z44
44-Lead TSOP Type II
CY7C1041L-20ZC
Z44
44-Lead TSOP Type II
CY7C1041-25VC
V34
44-Lead (400-Mil) Molded SOJ
CY7C1041L-25VC
V34
44-Lead (400-Mil) Molded SOJ
CY7C1041-25ZC
Z44
44-Lead TSOP Type II
CY7C1041L-25ZC
Z44
44-Lead TSOP Type II
CY7C1041-15ZI
Z44
44-Lead TSOP Type II
CY7C1041-15VI
V34
44-Lead (400-Mil) Molded SOJ
CY7C1041-17ZI
V34
44-Lead TSOP Type II
CY7C1041-17VI
Z44
44-Lead (400-Mil) Molded SOJ
CY7C1041-20ZI
Z44
44-Lead TSOP Type II
CY7C1041-20VI
Z44
44-Lead (400-Mil) Molded SOJ
CY7C1041-25ZI
Z44
44-Lead TSOP Type II
CY7C1041-25VI
Z44
44-Lead (400-Mil) Molded SOJ
Document #: 38-00644-B
9
Operating
Range
Commercial
Industrial
CY7C1041
Package Diagrams
44-Lead (400-Mil) Molded SOJ V34
51-85082-B
44-Pin TSOP II Z44
51-85087-A
© Cypress Semiconductor Corporation, 1999. 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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