STK17TA8-RF45ITR Cypress Semiconductor Corp, STK17TA8-RF45ITR Datasheet - Page 3

• Manufacturer Part Number: STK17TA8-RF45ITR
• Description: IC NVSRAM 1MBIT 45NS 48SSOP
• Manufacturer: Cypress Semiconductor Corp

Specifications of STK17TA8-RF45ITR

• Format - Memory: RAM
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Memory Size: 1M (128K x 8)
• Speed: 45ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Pinouts
Pin Descriptions
Document #: 001-52039 Rev. *A
Note
Pin Name
DQ
1. For detailed package size specifications, See
V
V
A
RTCcap
V
RTCbat
HSB
V
16
INT
V
NC
7
X
X
W
CAP
G
E
CC
-DQ
SS
-A
1
2
0
0
Power Supply Capacitor supplied backup RTC supply voltage (Left unconnected if V
Power Supply Battery supplied backup RTC supply voltage (Left unconnected if V
Power Supply Power: 3.0V, +20%, -10%
Power Supply Autostore Capacitor: Supplies power to nvSRAM during power loss to store data from SRAM to
Power Supply Ground
No Connect
I/O Type
Output
Output
Input
Input
Input
Input
Input
I/O
I/O
V
RTCbat
V
DQ
DQ
DQ
Address: The 17 address inputs select one of 131,072 bytes in the nvSRAM array or one of 16 bytes
in the clock register map
Data: Bi-directional 8-bit data bus for accessing the nvSRAM and RTC
Chip Enable: The active low E input selects the device
Write Enable: The active low W enables data on the DQ pins to be written to the address location
selected on the falling edge of E
Output Enable: The active low G input enables the data output buffers during read cycles.
De-asserting G high caused the DQ pins to tristate.
Crystal Connection, drives crystal on startup
Crystal Connection for 32.768 kHz crystal
Hardware Store Busy: When low this output indicates a Store is in progress. When pulled low external
to the chip, it initiates a nonvolatile STORE operation. A weak pull up resistor keeps this pin high if not
connected. (Connection Optional).
Interrupt Control: Can be programmed to respond to the clock alarm, the watchdog timer and the
power monitor. Programmable to either active high (push/pull) or active low (open-drain)
nonvolatile storage elements.
Unlabeled pins have no internal connections.
INT
V
NC
NC
NC
NC
CAP
A
A
A
A
A
A
A
A
A
X
X
A
A
SS
16
14
12
7
6
3
2
1
1
2
5
4
0
0
1
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
“Package Diagrams”
(TOP)
Figure 1. Pin Diagram - 48-PIn SSOP
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
48
47
46
45
HSB
V
A
W
A
NC
NC
NC
V
DQ
A
DQ
DQ
DQ
DQ
V
A
A
NC
NC
V
A
G
E
CC
15
11
RTCcap
10
CC
13
SS
8
9
6
7
5
4
3
on page 23..
Description
Relative PCB Area Usage
RTCcap
RTCbat
is used)
is used)
STK17TA8
[1]
Page 3 of 24
[+] Feedback
[+] Feedback