DS1216D Datasheet

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DS1216

SmartWatch RAM DS1216B/C/D/H

SmartWatch ROM DS1216E/F

www.maxim-ic.com

FEATURES

搂

搂

搂

搂

搂

Keeps track of hundredths of seconds,

seconds, minutes, hours, days, date of the

month, months, and years

Converts standard 2k x 8 up to 512k x 8

CMOS static RAMs into nonvolatile memory

Embedded lithium energy cell maintains

watch information and retains RAM data

Watch function is transparent to RAM

operation

Month and year determine the number of days

in each month; leap-year compensation valid

up to 2100

搂

Lithium energy source is electrically

disconnected to retain freshness until power is

applied for the first time

搂

Proven gas-tight socket contacts

搂

Full

卤10%

operating range

搂

Operating temperature range: 0掳C to +70掳C

搂

Accuracy is better than

卤1

minute/month @

+25掳C

ORDERING INFORMATION

DS1216B, DS1216C, DS1216D, DS1216E,

DS1216F, DS1216H

(See Figure 2 for letter suffix

marking identification.)

RST 1

2

3

4

5

6

7

[A2] 8

9

[A0] 10

DQ0 11

12

13

GND 14

28

V

CC

27 WE

26 V

CC

B

25

24

23

22

21

20

19

18

17

16

15

CE

OE

PIN DESCRIPTION

RST

DQ0

A2

A0

GND

CE

OE

WE

Vcc

V

CC

B

V

CC

D

-

RESET

- Data Input/Output 0 [RAM]

- Address Bit 2 (Read/Write [ROM])

- Address Bit 0 (Data Input [ROM])

- Ground

- Conditioned Chip Enable

- Output Enable

- Write Enable

- Switched V

CC

for 28-/32-Pin RAM

- Switched V

CC

for 24-Pin RAM

- Switched V

CC

for 28-Ppin RAM

RAM/ROM

RAM

RAM

RAM

ROM

ROM

RAM

RAM DENSITY

16k/64k

64k/256k

256k/1M

64k/256k

64k/256k/1M

1M/4M

1 of 13

DS1216B/C/D/E

28-Pin Intelligent Socket

PART

DS1216B

DS1216C

DS1216D

DS1216E

DS1216F

DS1216H

PCB MODIFICATION REQUIRED

FOR DENSITY UPGRADE?

No/Yes

No

No/Yes

No

No

No

111901

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