DS1646-120+ Maxim Integrated Products, DS1646-120+ Datasheet - Page 2

• Manufacturer Part Number: DS1646-120+
• Description: IC RAM TIMEKEEP NV 120NS 32-EDIP
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/NVSRAMr

Specifications of DS1646-120+

• Memory Size: 1M (128K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 32-DIP Module (600 mil), 32-EDIP
• Function: Clock/Calendar/NV Timekeeping RAM
• Rtc Memory Size: 131072 Byte
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Parallel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN DESCRIPTION
PDIP
1, 30
10
11
12
25
26
27
28
13
14
15
17
18
19
20
21
16
22
23
24
29
31
32
—
—
2
3
4
5
6
7
8
9
PIN
PowerCap
1, 33, 34
32
30
25
24
23
22
21
20
19
18
29
27
26
31
16
15
14
13
12
11
10
17
28
3
9
8
7
6
2
5
4
X1, X2,
NAME
GND
V
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
N.C.
PFO
A16
A14
A12
A11
A13
A10
A15
WE
V
OE
CE
A7
A6
A5
A4
A3
A2
A1
A0
A9
A8
BAT
CC
No Connection
Address Input
Data Input/Output
Ground
Active-Low Chip Enable
Address Input
Active-Low Output Enable
Active-Low Write Enable
Address Input
Power-Supply Input
Active-Low Power-Fail Output, Open Drain. Requires a pullup
resistor for proper operation.
Crystal Connection, V
2 of 12
BAT
Battery Connection
FUNCTION
DS1646/DS1646P