STK22C48-NF45ITR Cypress Semiconductor Corp, STK22C48-NF45ITR Datasheet - Page 3

• Manufacturer Part Number: STK22C48-NF45ITR
• Description: STK22C48-NF45ITR
• Manufacturer: Cypress Semiconductor Corp

Specifications of STK22C48-NF45ITR

• Format - Memory: RAM
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Memory Size: 16K (2K x 8)
• Speed: 45ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Pin Configurations
Table 1. Pin Definitions
Document Number: 001-51000 Rev. *D
Pin Name
DQ
A
V
HSB
0
V
V
WE
0
CE
OE
NC
–A
CAP
–DQ
CC
SS
10
7
Alt
W
G
E
Input or output Bidirectional data IO lines. Used as input or output lines depending on operation.
Input or output Hardware Store Busy (HSB). When LOW, this output indicates a Hardware Store is in progress.
Power supply Power supply inputs to the device.
Power supply AutoStore capacitor. Supplies power to nvSRAM during power loss to store data from SRAM
No connect
IO Type
Ground
Input
Input
Input
Input
V
DQ2
DQ0
DQ1
V
CAP
NC
A
A
A
A
A
A
A
A
SS
2
Address inputs. Used to select one of the 2,048 bytes of the nvSRAM.
Write enable input, active LOW. When the chip is enabled and WE is LOW, data on the IO
pins is written to the specific address location.
Chip enable input, active LOW. When LOW, selects the chip. When HIGH, deselects the chip.
Output enable, active LOW. The active LOW OE input enables the data output buffers during
read cycles. Deasserting OE HIGH causes the IO pins to tri-state.
Ground for the device. The device is connected to ground of the system.
When pulled low external to the chip, it initiates a nonvolatile STORE operation. A weak internal
pull-up resistor keeps this pin high if not connected (connection optional).
to nonvolatile elements.
No connect. This pin is not connected to the die.
7
6
5
4
3
1
0
12
10
11
13
1
2
3
4
6
8
14
5
7
9
Figure 1. Pin Diagram - 28-pin SOIC
28-SOIC
(Not To Scale)
Top View
Description
28
27
26
25
24
23
21
22
20
19
18
17
16
15
V
HSB
OE
A
CE
DQ7
DQ6
DQ5
DQ4
DQ3
WE
A
A
NC
8
CC
9
10
STK22C48
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