CYPRESS CY7C1046B-20VC

046B
CY7C1046B
1M x 4 Static RAM
Features
• High speed
— tAA = 12 ns
• Low active power
— 935 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
Functional Description
The CY7C1046B is a high-performance CMOS static RAM organized as 1,048,576 words by 4 bits. Easy memory expan-
sion is provided by an active LOW Chip Enable (CE), an active
LOW Output Enable (OE), and three-state drivers. Writing to
the device is accomplished by taking Chip Enable (CE) and
Write Enable (WE) inputs LOW. Data on the four I/O pins (I/O0
through I/O3) is then written into the location specified on the
address pins (A0 through A19).
Reading from the device is accomplished by taking Chip
Enable (CE) and Output Enable (OE) LOW while forcing Write
Enable (WE) HIGH. Under these conditions, the contents of
the memory location specified by the address pins will appear
on the I/O pins.
The four input/output pins (I/O0 through I/O3) are placed in a
high-impedance state when the device is deselected (CE
HIGH), the outputs are disabled (OE HIGH), or during a write
operation (CE LOW, and WE LOW).
The CY7C1046B is available in a standard 400-mil-wide
32-pin SOJ package with center power and ground (revolutionary) pinout.
Logic Block Diagram
Pin Configuration
SOJ
Top View
INPUT BUFFER
ROW DECODER
I/O0
1M x 4
ARRAY
SENSE AMPS
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A0
A1
A2
A3
A4
CE
I/O0
VCC
GND
I/O1
WE
A5
A6
A7
A8
A9
I/O1
I/O2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A19
A18
A17
A16
A15
OE
I/O3
GND
VCC
I/O2
A14
A13
A12
A11
A10
NC
I/O3
1046B–2
COLUMN
DECODER
CE
POWER
DOWN
OE
A 11
A 12
A 13
A14
A15
A16
A17
A18
A19
WE
1046B–1
Selection Guide
7C1046B-12
7C1046B-15
7C1046B-20
Maximum Access Time (ns)
12
15
20
Maximum Operating Current (mA)
170
150
130
8
8
8
0.5
0.5
0.5
Maximum CMOS Standby
Current (mA)
Com’l
L version
Shaded areas contain advance information.
Cypress Semiconductor Corporation
Document #: 38-05144 Rev. **
•
3901 North First Street
•
San Jose
•
CA 95134 • 408-943-2600
Revised September 6, 2001
CY7C1046B
Maximum Ratings
Current into Outputs (LOW) ........................................ 20 mA
Static Discharge Voltage ........................................... >2001V
(per MIL-STD-883, Method 3015)
(Above which the useful life may be impaired. For user guidelines, not tested.)
Latch-Up Current..................................................... >200 mA
Storage Temperature ................................. –65°C to +150°C
Operating Range
Ambient Temperature with
Power Applied............................................. –55°C to +125°C
Supply Voltage on VCC to Relative GND[1] .... –0.5V to +7.0V
Range
DC Voltage Applied to Outputs
in High Z State[1] ....................................–0.5V to VCC + 0.5V
Commercial
Ambient
Temperature[2]
VCC
0°C to +70°C
4.5V–5.5V
DC Input Voltage[1] ................................–0.5V to VCC + 0.5V
Electrical Characteristics Over the Operating Range
Parameter
Description
Test Conditions
7C1046B-12
7C1046B-15
7C1046B-20
Min.
Min.
Min.
Max.
2.4
Max.
Unit
0.4
V
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
+ 0.3
2.2
VCC
+ 0.3
2.2
VCC
+ 0.3
V
VIL
Input LOW Voltage[1]
–0.3
0.8
–0.3
0.8
–0.3
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
170
150
130
mA
ISB1
Automatic CE
Power-Down Current
—TTL Inputs
Max. VCC, CE > VIH
VIN > VIH or
VIN < VIL, f = fMAX
20
20
20
mA
ISB2
Automatic CE
Power-Down Current
—CMOS Inputs
Com’l
8
8
8
mA
L version
0.5
0.5
0.5
Max. VCC,
CE > VCC – 0.3V,
VIN > VCC – 0.3V,
or VIN < 0.3V, f = 0
2.4
Max.
0.4
2.4
0.4
V
Shaded areas contain advance information.
Capacitance[3]
Parameter
Description
CIN
Input Capacitance
COUT
I/O Capacitance
Test Conditions
TA = 25°C, f = 1 MHz,
VCC = 5.0V
Max.
Unit
6
pF
6
pF
Note:
1. VIL (min.) = –2.0V for pulse durations of less than 20 ns.
2. TA is the “Instant On” case temperature.
3. Tested initially and after any design or process changes that may affect these parameters.
Document #: 38-05144 Rev. **
Page 2 of 8
CY7C1046B
AC Test Loads and Waveforms
R1 481 Ω
5V
5V
OUTPUT
ALL INPUT PULSES
R1 481 Ω
Vcc
90%
OUTPUT
30 pF
R2
255 Ω
INCLUDING
JIG AND
SCOPE
(a)
GND
R2
255 Ω
5 pF
INCLUDING
JIG AND
SCOPE
(b)
90%VCC
10%
10%VCC
Rise Time:1 V/ns
Fall Time:1 V/ns
1046B–4
1046B–3
THÉVENIN EQUIVALENT
167Ω
1.73V
OUTPUT
Equivalent to:
Switching Characteristics[4] Over the Operating Range
7C1046B-12
Parameter
Description
Min.
Max.
7C1046B-15
7C1046B-20
Min.
Min.
Max.
Max.
Unit
READ CYCLE
tpower
VCC(typical) to the first access[5]
1
1
1
µs
tRC
Read Cycle Time
12
15
20
ns
tAA
Address to Data Valid
tOHA
Data Hold from Address Change
tACE
CE LOW to Data Valid
12
15
20
ns
tDOE
OE LOW to Data Valid
6
7
8
ns
[7]
tLZOE
OE LOW to Low Z
tHZOE
OE HIGH to High Z[6, 7]
tLZCE
CE LOW to Low Z
[7]
12
3
0
3
CE HIGH to High Z
tPU
CE LOW to Power-Up
tPD
CE HIGH to Power-Down
6
3
0
12
ns
8
7
ns
ns
8
0
15
ns
ns
0
7
3
0
20
3
0
6
[6, 7]
tHZCE
15
3
ns
ns
20
ns
[8, 9]
WRITE CYCLE
tWC
Write Cycle Time
12
15
20
ns
tSCE
CE LOW to Write End
8
10
15
ns
tAW
Address Set-Up to Write End
8
10
15
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
8
10
12
ns
tSD
Data Set-Up to Write End
6
8
10
ns
tHD
Data Hold from Write End
0
0
0
ns
3
3
3
ns
tLZWE
tHZWE
WE HIGH to Low Z
[7]
WE LOW to High Z
[6, 7]
6
7
8
ns
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. This part has a voltage regulator which steps down the voltage from 5V to 3.3V internally. tpower time has to be provided initially before a read/write operation
is started.
6. 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.
7. At any given temperature and voltage condition, tHZCE is less than tLZCE, tHZOE is less than tLZOE, and tHZWE is less than tLZWE for any given device.
8. 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.
9. The minimum write cycle time for Write Cycle no. 3 (WE controlled, OE LOW) is the sum of tHZWE and tSD.
Document #: 38-05144 Rev. **
Page 3 of 8
CY7C1046B
Data Retention Characteristics Over the Operating Range
Parameter
VDR
Conditions[10]
Description
Min.
VCC for Data Retention
ICCDR
tCDR
Data Retention Current
[3]
Com’l
VCC = VDR = 2.0V,
CE > VCC – 0.3V
VIN > VCC – 0.3V or VIN < 0.3V
Chip Deselect to Data Retention Time
tR
Max
Unit
2.0
Operation Recovery Time
V
µA
200
0
ns
200
µs
Data Retention Waveform
DATA RETENTION MODE
3.0V
VCC
3.0V
VDR > 2V
tR
tCDR
CE
1046B–5
Switching Waveforms
Read Cycle No. 1[11, 12]
tRC
ADDRESS
tAA
tOHA
DATA OUT
PREVIOUS DATA VALID
DATA VALID
1046B–6
Read Cycle No. 2 (OE Controlled)[12, 13]
ADDRESS
tRC
CE
tACE
OE
tHZOE
tDOE
DATA OUT
tLZOE
HIGH IMPEDANCE
tLZCE
VCC
SUPPLY
CURRENT
tHZCE
HIGH
IMPEDANCE
DATA VALID
tPD
tPU
50%
ICC
50%
ISB
1046B–7
Notes:
10. No input may exceed VCC + 0.5V.
11. Device is continuously selected. OE, CE = VIL.
12. WE is HIGH for read cycle.
13. Address valid prior to or coincident with CE transition LOW.
Document #: 38-05144 Rev. **
Page 4 of 8
CY7C1046B
Switching Waveforms (continued)
Write Cycle No. 1 (CE Controlled)[14, 15]
tWC
ADDRESS
tSCE
CE
tSA
tSCE
tHA
tAW
tPWE
WE
tSD
DATA I/O
tHD
DATA VALID
1046B–8
Write Cycle No. 2 (WE Controlled, OE HIGH During Write)[14, 15]
tWC
ADDRESS
tSCE
CE
tAW
tSA
tHA
tPWE
WE
OE
tSD
DATA I/O
tHD
DATAIN VALID
NOTE 16
tHZOE
1046B–9
Notes:
14. Data I/O is high impedance if OE = VIH.
15. If CE goes HIGH simultaneously with WE going HIGH, the output remains in a high-impedance state.
16. During this period the I/Os are in the output state and input signals should not be applied.
Document #: 38-05144 Rev. **
Page 5 of 8
CY7C1046B
Switching Waveforms (continued)
Write Cycle No. 3 (WE Controlled, OE LOW)[15]
tWC
ADDRESS
tSCE
CE
tAW
tSA
tHA
tPWE
WE
tSD
DATA I/O
NOTE 16
tHD
DATA VALID
tLZWE
tHZWE
1046B–10
Ordering Information
Speed
(ns)
Ordering Code
Package
Name
Package Type
12
CY7C1046B-12VC
V33
32-Lead (400-Mil) Molded SOJ
15
CY7C1046B-15VC
V33
32-Lead (400-Mil) Molded SOJ
20
CY7C1046B-20VC
V33
32-Lead (400-Mil) Molded SOJ
12
CY7C1046BL-12VC
V33
32-Lead (400-Mil) Molded SOJ
15
CY7C1046BL-15VC
V33
32-Lead (400-Mil) Molded SOJ
20
CY7C1046BL-20VC
V33
32-Lead (400-Mil) Molded SOJ
Operating
Range
Commercial
Shaded areas contain advance information.
Document #: 38-05144 Rev. **
Page 6 of 8
CY7C1046B
Package Diagram
32-Lead (400-Mil) Molded SOJ V33
51-85033-A
Document #: 38-05144 Rev. **
Page 7 of 8
© Cypress Semiconductor Corporation, 2001. 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.
CY7C1046B
Document Title: CY7C1046B 1M x 4 Static RAM
Document Number: 38-05144
REV.
ECN NO.
Issue
Date
Orig. of
Change
Description of Change
**
109888
09/22/01
SZV
Change from Spec number: 38-00948 to 38-05144
Document #: 38-05144 Rev. **
Page 8 of 8