DS1744-70+ Dallas Semiconductor, DS1744-70+ Datasheet - Page 2

• Manufacturer Part Number: DS1744-70+
• Description: Nonvolatile timekeeping RAM, with Crystal, Power-Fail & Lithium Battery, DIP-28
• Manufacturer: Dallas Semiconductor

Specifications of DS1744-70+

• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIN DESCRIPTION
EDIP
10
21
23
24
25
26
11
12
13
15
16
17
18
19
14
20
22
27
28
—
—
—
1
2
3
4
5
6
7
8
9
PIN
PowerCap
1, 2, 3, 33,
32
30
25
24
23
22
21
20
19
18
28
29
27
26
31
16
15
14
13
12
11
10
17
34
9
8
7
6
5
4
X1, X2,
NAME
GND
V
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
N.C.
RST
A14
A12
A10
A11
A13
WE
V
CE
OE
A7
A6
A5
A4
A3
A2
A1
A0
A9
A8
BAT
CC
Address Input
Data Input/Output
Ground
Active-Low Chip-Enable Input
Active-Low Output-Enable Input
Active-Low Write-Enable Input
Power-Supply Input
Active-Low Reset Output, Open Drain. Requires a pullup resistor for
proper operation.
No Connection
Crystal Connections, V
2 of 20
BAT
Battery Connection
FUNCTION