M48T513Y, M48T513V

2/23

Figure 2. DIP Connections

VSS

VCC

AI02307

M48T513Y

M48T513V

10

1

2

5

6

7

8

9

11

12

13

16

17

18

30

29

26

25

24

23

22

21

20

19

3

4

28

27

32

31

14

15

34

33

36

35

A1

A0

DQ0

A7

A4

A3

A2

A6

A5

A13

A10

A8

A9

DQ7

A15

A11

G

E

DQ5

DQ1

DQ2

DQ3

DQ4

DQ6

A16

A18

A12

A14

W

A17

RSTIN

RST

IRQ/FT

WDI

Note: 1. Stresses greater than those listed under ”Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress

rating only and functional operation of the device at these or any other conditions above those indicated in the operational section

of this specification is not implied. Exposure to the absolute maximum rating conditions for extended periods of time may affect

reliability.

2. Soldering temperature not to exceed 260

°C for 10 seconds (total thermal budget not to exceed 150°C for longer than 30 seconds).

CAUTION: Negative undershoots below –0.3V are not allowed on any pin while in the Battery Back-up mode.

Symbol

Parameter

Value

Unit

Ambient Operating Temperature

0 to 70

°C

–40 to 85

°C

Input or Output Voltages

V

Supply Voltage

M48T513Y

–0.3 to 7.0

V

M48T513V

–0.3 to 4.6

V

Output Current

20

mA

Power Dissipation

1

W

DESCRIPTION

The M48T513Y/V TIMEKEEPER RAM is a 512Kb

x 8 non-volatile static RAM and real time clock,

with programmable alarms and a watchdog timer.

The special DIP package provides a fully integrat-

ed battery back-up memory and real time clock so-

lution. The M48T513Y/V directly replaces industry

standard 512Kb x 8 SRAM. It also provides the

non-volatility of Flash without any requirement for

special write timing or limitations on the number of

writes that can be performed.

Table 1. Signal Names

A0-A18

Address Inputs

DQ0-DQ7

Data Inputs / Outputs

E

Chip Enable Input

G

Output Enable Input

W

Write Enable Input

WDI

Watchdog input

RST

Reset Output (open drain)

RSTIN

Reset Input

IRQ/FT

Interrupt / Frequency Test

Output (open drain)

Supply Voltage

Ground

For surface mount environments ST provides a

Chip Set solution consisting of a 44 pin 330mil

SOIC TIMEKEEPER Supervisor (M48T201V/Y)

and a 32 pin TSOP Type II (10 x 20mm) LPSRAM

(M68Z512/W) packages.

The 44 pin 330mil SOIC provides sockets with

gold plated contacts at both ends for direct con-

nection to a separate SNAPHAT housing contain-

ing the battery.