M48T512V-70PM1(2010) 查看數據表（PDF） - STMicroelectronics

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M48T512V-70PM1
(Rev.:2010)

5.0 or 3.3 V, 4 Mbit (512 Kbit x 8) TIMEKEEPER® SRAM

STMicroelectronics 

Description

Figure 2. 32-pin DIP connections

A18

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 M48T512Y 25

9 M48T512V 24

10

23

11

22

12

21

13

20

14

19

15

18

16

17

VCC

A15

A17

W

A13

A8

A9

A11

G

A10

E

DQ7

DQ6

DQ5

DQ4

DQ3

Figure 3. Block diagram

M48T512Y, M48T512V

AI02263

32,768 Hz

CRYSTAL

LITHIUM

CELL

OSCILLATOR AND

CLOCK CHAIN

8x8

TIMEKEEPER

REGISTERS

POWER

VOLTAGE SENSE

AND

SWITCHING

CIRCUITRY

VPFD

524,280 x 8

SRAM ARRAY

A0-A18

DQ0-DQ7

E

W

G

VCC

VSS

AI02384

6/23

Doc ID 5747 Rev 6

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