CY7C1021BN
1-Mbit (64 K × 16) Static RAM
1-Mbit (64 K × 16) Static RAM
Features
■
Functional Description
The CY7C1021BN is a high performance CMOS static RAM
organized as 65,536 words by 16 bits. This device has an
automatic power down feature that significantly reduces power
consumption when deselected.
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 the input/output (I/O) pins (I/O
1
through
I/O
8
), is written into the location specified on the address pins (A
0
through A
15
). If Byte High Enable (BHE) is LOW, then data from
I/O pins (I/O
9
through I/O
16
) is written into the location specified
on the address pins (A
0
through A
15
).
Reading from the device is accomplished by taking CE and
Output Enable (OE) LOW while forcing WE HIGH. If BLE is LOW,
then data from the memory location specified by the address pins
appears on I/O
1
to I/O
8
. If BHE is LOW, then data from memory
appears on I/O
9
to I/O
16
. See the
Truth Table on page 11
for a
complete description of read and write modes.
The I/O pins (I/O
1
through I/O
16
) 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, WE LOW).
The CY7C1021BN is available in standard 44-pin TSOP type II
and 44-pin 400-mil-wide SOJ packages. Use part number
CY7C1021BN when ordering 15 ns t
AA
.
For a complete list of related resources, click
here.
Temperature ranges
❐
Commercial: 0 °C to 70 °C
❐
Industrial: –40 °C to 85 °C
❐
Automotive-A: –40 °C to 85 °C
❐
Automotive-E: –40 °C to 125 °C
High speed
❐
t
AA
= 15 ns (Automotive)
Complementary metal oxide semiconductor (CMOS) for
optimum speed/power
Low active power
❐
825 mW (maximum)
Automatic power down when deselected
Independent control of upper and lower bits
Available in Pb-free and non Pb-free 44-pin TSOP II and 44-pin
400-mil-wide SOJ
■
■
■
■
■
■
Logic Block Diagram
Data In Drivers
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
Row Decoder
64K x 16
RAM Array
512 X 2048
Sense Amps
I/O
1
–I/O
8
I/O
9
–I/O
16
Column Decoder
BHE
WE
CE
OE
BLE
A
8
A
9
A
10
A
11
A
12
A
13
A
14
A
15
Cypress Semiconductor Corporation
Document Number: 001-06494 Rev. *I
•
198 Champion Court
•
San Jose
,
CA 95134-1709
•
408-943-2600
Revised October 23, 2015
CY7C1021BN
Contents
Selection Guide ................................................................ 3
Pin Configuration ............................................................. 3
Pin Definitions .................................................................. 4
Maximum Ratings ............................................................. 5
Operating Range ............................................................... 5
Electrical Characteristics ................................................. 5
Capacitance ...................................................................... 6
Thermal Resistance .......................................................... 6
AC Test Loads and Waveforms ....................................... 6
Switching Characteristics ................................................ 7
Switching Waveforms ...................................................... 8
Truth Table ...................................................................... 11
Ordering Information ...................................................... 12
Ordering Code Definitions ......................................... 12
Package Diagrams .......................................................... 13
Acronyms ........................................................................ 14
Document Conventions ................................................. 14
Units of Measure ....................................................... 14
Document History Page ................................................. 15
Sales, Solutions, and Legal Information ...................... 16
Worldwide Sales and Design Support ....................... 16
Products .................................................................... 16
PSoC® Solutions ...................................................... 16
Cypress Developer Community ................................. 16
Technical Support ..................................................... 16
Document Number: 001-06494 Rev. *I
Page 2 of 16
CY7C1021BN
Selection Guide
Description
Maximum access time (ns)
Maximum operating current (mA)
Commercial/Industrial
Automotive-A
Automotive-E
Maximum CMOS standby current (mA)
Commercial/Industrial
Commercial/Industrial (L version)
Automotive-A (L version)
Automotive-E
CY7C1021B-15
15
130
130
130
10
0.5
0.5
15
Pin Configuration
Figure 1. 44-pin SOJ/TSOP II pinout (Top View)
A
4
A
3
A
2
A
1
A
0
CE
I/O
1
I/O
2
I/O
3
I/O
4
V
CC
V
SS
I/O
5
I/O
6
I/O
7
I/O
8
WE
A
15
A
14
A
13
A
12
NC
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
5
A
6
A
7
OE
BHE
BLE
I/O
16
I/O
15
I/O
14
I/O
13
V
SS
V
CC
I/O
12
I/O
11
I/O
10
I/O
9
NC
A
8
A
9
A
10
A
11
NC
Document Number: 001-06494 Rev. *I
Page 3 of 16
CY7C1021BN
Pin Definitions
Pin Name
A
0
–A
15
Pin Number
1–5,18–21,
24–27, 42–44
I/O Type
Input
Description
Address inputs used to select one of the address locations.
I/O
1
–I/O
16
7–10, 13–16, Input/Output Bidirectional data I/O lines. Used as input or output lines depending on operation.
29–32, 35–38
NC
WE
CE
BHE, BLE
OE
22, 23, 28
17
6
40, 39
41
No Connect Not connected to the die.
Input/Control Write enable input, active LOW. When selected LOW, a write is conducted. When
deselected HIGH, a read is conducted.
Input/Control Chip enable input, active LOW. When LOW, selects the chip. When HIGH, deselects the
chip.
Input/Control Byte enable select inputs, active LOW. BHE controls I/O
16
–I/O
9
, BLE controls I/O
8
–I/O
1
.
Input/Control Output enable, active LOW. Controls the direction of the I/O pins. When LOW, the I/O
pins are allowed to behave as outputs. When deasserted HIGH, I/O pins are tristated,
and act as input data pins.
Ground
Ground for the device. Should be connected to ground of the system.
Power Supply Power supply inputs to the device.
V
SS
V
CC
12, 34
11, 33
Document Number: 001-06494 Rev. *I
Page 4 of 16
CY7C1021BN
Maximum Ratings
Exceeding the maximum ratings may impair the useful life of the
device. These user guidelines are not tested.
Storage temperature ................................ –65
C
to +150
C
Ambient temperature with
power applied .......................................... –55C to +125
C
Supply voltage on
V
CC
relative to GND
[1]
................................–0.5 V to +7.0 V
DC voltage applied to outputs
in High Z state
[1]
................................ –0.5 V to V
CC
+ 0.5 V
DC input voltage
[1]
............................. –0.5 V to V
CC
+ 0.5 V
Current into outputs (LOW) ........................................ 20 mA
Static discharge voltage
(per MIL-STD-883, Method 3015) .......................... > 2001 V
Latch-up current .................................................... > 200 mA
Operating Range
Range
Commercial
Industrial
Automotive-A
Automotive-E
Ambient Temperature (T
A
)
[2]
0
C
to +70
C
–40
C
to +85
C
–40
C
to +85
C
–40
C
to +125
C
V
CC
5 V
10%
Electrical Characteristics
Over the operating range
Parameter
V
OH
V
OL
V
IH
V
IL
I
IX
Description
Output HIGH voltage
Output LOW voltage
Input HIGH voltage
Input LOW voltage
[1]
Input leakage current
GND < V
I
< V
CC
Commercial / Industrial
Automotive-A
Automotive-E
I
OZ
Output leakage current
GND < V
I
< V
CC
,
Output Disabled
Commercial / Industrial
Automotive-A
Automotive-E
I
CC
V
CC
operating supply current
V
CC
= Max,
I
OUT
= 0 mA,
f = f
MAX
= 1/t
RC
Commercial / Industrial
Automotive-A
Automotive-E
Test Conditions
V
CC
= Min, I
OH
= –4.0 mA
V
CC
= Min, I
OL
= 8.0 mA
-15
Min
2.4
–
2.2
–0.5
–1
–1
–4
–1
–1
–4
–
–
–
–
–
–
–
–
–
–
Max
–
0.4
6.0
0.8
+1
+1
+4
+1
+1
+4
130
130
130
40
40
50
10
0.5
0.5
15
mA
mA
Unit
V
V
V
V
A
A
A
A
A
A
mA
I
SB1
Automatic CE power down
current – TTL inputs
Max V
CC
, CE > V
IH
,
Commercial / Industrial
V
IN
> V
IH
or V
IN
< V
IL
,
Automotive-A
f = f
MAX
Automotive-E
Max V
CC
,
CE > V
CC
– 0.3 V,
V
IN
> V
CC
– 0.3 V,
or V
IN
< 0.3 V, f = 0
Commercial / Industrial
Commercial / Industrial (L)
Automotive-A (L)
Automotive-E
I
SB2
Automatic CE power down
current – CMOS inputs
Notes
1. V
IL
(min.) = –2.0 V and V
IH
(max) = V
CC
+ 0.5 V for pulse durations of less than 20 ns.
2. T
A
is the “Instant On” case temperature.
Document Number: 001-06494 Rev. *I
Page 5 of 16
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