• Available in Pb-free and non Pb-free 44-pin TSOP II and
molded 44-pin (400-Mil) SOJ packages
Functional Description
The CY7C1041BN 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/O
0
through I/O
7
), is
written into the location specified on the address pins (A
0
through A
17
). If Byte High Enable (BHE) is LOW, then data
from I/O pins (I/O
8
through I/O
15
) is written into the location
specified on the address pins (A
0
through A
17
).
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/O
0
to I/O
7
. If Byte High Enable (BHE) is
LOW, then data from memory will appear on I/O
8
to I/O
15
. See
the truth table at the back of this data sheet for a complete
description of read and write modes.
The input/output pins (I/O
0
through I/O
15
) 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 CY7C1041BN 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
INPUT BUFFER
Pin Configuration
SOJ
TSOP II
Top View
A
0
A
1
A
2
A
3
A
4
CE
I/O
0
I/O
1
I/O
2
I/O
3
V
CC
V
SS
I/O
4
I/O
5
I/O
6
I/O
7
WE
A
5
A
6
A
7
A
8
A
9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
256K x 16
ARRAY
I/O
0
–I/O
7
I/O
8
–I/O
15
COLUMN
DECODER
BHE
WE
CE
OE
BLE
A
17
A
16
A
15
OE
BHE
BLE
I/O
15
I/O
14
I/O
13
I/O
12
V
SS
V
CC
I/O
11
I/O
10
I/O
9
I/O
8
NC
A
14
A
13
A
12
A
11
A
10
ROW DECODER
A
9
A
10
A
11
A
12
A
13
A
14
A
15
A
16
A
17
SENSE AMPS
Cypress Semiconductor Corporation
Document #: 001-06496 Rev. *A
•
198 Champion Court
•
San Jose
,
CA 95134-1709
•
408-943-2600
Revised August 31, 2006
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CY7C1041BN
Selection Guide
-15
Maximum Access Time
Maximum Operating Current
Commercial
Industrial
Automotive-A
Maximum CMOS Standby Current
Commercial
Commercial L
Industrial
Automotive-A
3
0.5
6
15
190
210
-20
20
170
190
190
3
0.5
6
6
DC Input Voltage
[1]
................................ –0.5V to V
CC
+ 0.5V
Current into Outputs (LOW)......................................... 20 mA
mA
Unit
ns
mA
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 on V
CC
to Relative GND
[1]
.... –0.5V to +7.0V
DC Voltage Applied to Outputs
in High Z State
[1]
....................................–0.5V to V
CC
+ 0.5V
Operating Range
Range
Commercial
Industrial
Automotive-A
Ambient
Temperature
[2]
0°C to +70°C
–40°C to +85°C
–40°C to +85°C
V
CC
5V ± 0.5
Electrical Characteristics
Over the Operating Range
-15
Parameter
V
OH
V
OL
V
IH
V
IL
I
IX
I
OZ
I
CC
Description
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
[1]
Input Load Current
V
CC
Operating Supply
Current
GND < V
I
< V
CC
V
CC
= Max.,
f = f
MAX
= 1/t
RC
Comm’l
Ind’l
Auto-A
I
SB1
Automatic CE
Power-Down
Current—TTL Inputs
Automatic CE
Power-Down Current
—CMOS Inputs
Max. V
CC
, CE > V
IH,
V
IN
> V
IH
or
V
IN
< V
IL
, f = f
MAX
Max. V
CC
, CE > V
CC
– 0.3V, Comm’l
V
IN
> V
CC
– 0.3V,
Comm’l L
or V
IN
< 0.3V, f = 0
Ind’l
Auto-A
Notes:
1. V
IL
(min.) = –2.0V for pulse durations of less than 20 ns.
2. T
A
is the case temperature.
3. Tested initially and after any design or process changes that may affect these parameters.
-20
Max.
0.4
Min.
2.4
0.4
2.2
–0.5
–1
–1
V
CC
+ 0.5
0.8
+1
+1
170
190
190
40
40
Max.
Unit
V
V
V
V
mA
mA
mA
mA
mA
mA
Test Conditions
V
CC
= Min., I
OH
= –4.0 mA
V
CC
= Min., I
OL
= 8.0 mA
Min.
2.4
2.2
–0.5
–1
–1
V
CC
+ 0.5
0.8
+1
+1
190
210
Output Leakage Current GND < V
OUT
< V
CC
, Output Disabled
I
SB2
3
0.5
6
3
0.5
6
6
mA
mA
mA
mA
Document #: 001-06496 Rev. *A
Page 2 of 10
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CY7C1041BN
Capacitance
[3]
Parameter
C
IN
C
OUT
Description
Input Capacitance
I/O Capacitance
Test Conditions
T
A
= 25°C, f = 1 MHz,
V
CC
= 5.0V
Max.
8
8
Unit
pF
pF
AC Test Loads and Waveforms
5V
OUTPUT
30 pF
INCLUDING
JIG AND
SCOPE
(a)
R2
255Ω
R1 481Ω
R1 481Ω
5V
OUTPUT
5 pF
INCLUDING
JIG AND
SCOPE
(b)
R2
255Ω
GND
≤
3 ns
3.0V
90%
10%
90%
10%
≤
3 ns
ALL INPUT PULSES
Equivalent to:
THÉVENIN EQUIVALENT
167Ω
1.73V
OUTPUT
Switching Characteristics
[4]
Over the Operating Range
-15
Parameter
Read Cycle
t
power
t
RC
t
AA
t
OHA
t
ACE
t
DOE
t
LZOE
t
HZOE
t
LZCE
t
HZCE
t
PU
t
PD
t
DBE
t
LZBE
t
HZBE
V
CC
(typical) to the First Access
[5]
Read Cycle Time
Address to Data Valid
Data Hold from Address Change
CE LOW to Data Valid
OE LOW to Data Valid
OE LOW to Low Z
OE HIGH to High Z
[6, 7]
CE LOW to Low Z
[7]
CE HIGH to High Z
[6, 7]
CE LOW to Power-Up
CE HIGH to Power-Down
Byte Enable to Data Valid
Byte Enable to Low Z
Byte Disable to High Z
0
7
0
15
7
0
8
3
7
0
20
8
0
7
3
8
3
15
7
0
8
1
15
15
3
20
8
1
20
20
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Description
Min.
Max.
Min.
-20
Max.
Unit
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
I
OL
/I
OH
and 30-pF load capacitance.
5. This part has a voltage regulator which steps down the voltage from 5V to 3.3V internally. t
power
time has to be provided initially before a read/write operation is
started.
6. t
HZOE
, t
HZCE
, and t
HZWE
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, t
HZCE
is less than t
LZCE
, t
HZOE
is less than t
LZOE
, and t
HZWE
is less than t
LZWE
for any given device.
Document #: 001-06496 Rev. *A
Page 3 of 10
[+] Feedback
CY7C1041BN
Switching Characteristics
[4]
Over the Operating Range (continued)
-15
Parameter
Write Cycle
[8, 9]
t
WC
t
SCE
t
AW
t
HA
t
SA
t
PWE
t
SD
t
HD
t
LZWE
t
HZWE
t
BW
Write Cycle Time
CE LOW to Write End
Address Set-Up to Write End
Address Hold from Write End
Address Set-Up to Write Start
WE Pulse Width
Data Set-Up to Write End
Data Hold from Write End
WE HIGH to Low Z
[7]
WE LOW to High Z
[6, 7]
Byte Enable to End of Write
12
15
12
12
0
0
12
8
0
3
7
13
20
13
13
0
0
13
9
0
3
8
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Description
Min.
Max.
Min.
-20
Max.
Unit
Data Retention Characteristics
Over the Operating Range
(L version only)
Parameter
V
DR
I
CCDR
t
CDR[3]
t
R[10]
Description
V
CC
for Data Retention
Data Retention Current
Chip Deselect to Data Retention Time
Operation Recovery Time
V
CC
= V
DR
= 2.0V,
CE > V
CC
– 0.3V,
V
IN
> V
CC
– 0.3V or V
IN
< 0.3V
Conditions
[11]
Min.
2.0
200
0
t
RC
Max.
Unit
V
µA
ns
ns
Data Retention Waveform
DATA RETENTION MODE
V
CC
3.0V
t
CDR
CE
V
DR
> 2V
3.0V
t
R
Notes:
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 t
HZWE
and t
SD
.
10. t
r
< 3 ns for the -15 speed. t
r
< 5 ns for the -20 and slower speeds.
11. No input may exceed V
CC
+ 0.5V.
Document #: 001-06496 Rev. *A
Page 4 of 10
[+] Feedback
CY7C1041BN
Switching Waveforms
Read Cycle No. 1
[12, 13]
t
RC
ADDRESS
t
AA
t
OHA
DATA OUT
PREVIOUS DATA VALID
DATA VALID
Read Cycle No. 2 (OE Controlled)
[13, 14]
ADDRESS
t
RC
CE
t
ACE
OE
BHE, BLE
t
DOE
t
LZOE
t
DBE
t
LZBE
HIGH IMPEDANCE
t
LZCE
V
CC
SUPPLY
CURRENT
t
PU
50%
t
HZCE
t
HZBE
DATA VALID
t
PD
50%
ISB
ICC
t
HZOE
HIGH
IMPEDANCE
DATA OUT
Notes:
12. Device is continuously selected. OE, CE, BHE, and/or BHE = V
IL
.
13. WE is HIGH for read cycle.
14. Address valid prior to or coincident with CE transition LOW.
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