M48T129V(2005) 查看數據表（PDF） - STMicroelectronics

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M48T129V
(Rev.:2005)

5.0 or 3.3V, 1 Mbit (128 Kbit x 8) TIMEKEEPER® SRAM

STMicroelectronics 

Figure 3. 32-pin Module Connections

RST

A16

A14

A12

A7

A6

A5

A4

A3

A2

A1

A0

DQ0

DQ1

DQ2

VSS

1

32

2

31

3

30

4

29

5

28

6

27

7

26

8 M48T129Y 25

9 M48T129V 24

10

23

11

22

12

21

13

20

14

19

15

18

16

17

VCC

A15

IRQ/FT

W

A13

A8

A9

A11

G

A10

E

DQ7

DQ6

DQ5

DQ4

DQ3

AI02261

Figure 4. Block Diagram

M48T129Y, M48T129V

32,768 Hz

CRYSTAL

LITHIUM

CELL

OSCILLATOR AND

CLOCK CHAIN

16 x 8

TIMEKEEPER

REGISTERS

POWER

VOLTAGE SENSE

AND

SWITCHING

CIRCUITRY

VPFD

131,056 x 8

SRAM ARRAY

RST

IRQ/FT

A0-A16

DQ0-DQ7

E

W

G

VCC

VSS

AI02583

5/30

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