DS1689/DS1693
3V/5V Serialized Real-Time Clocks
with NV RAM Control
www.maxim-ic.com
FEATURES
Incorporates Industry Standard DS1287 PC
Clock Plus Enhanced Features:
+3V or +5V Operation
64-Bit Silicon Serial Number
64-Bit Customer Specific ROM or
Additional Serial Number Available
Power Control Circuitry Supports System
Power-On from Date/Time Alarm or Key
Closure
Automatic Battery Backup and Write
Protection to External SRAM
Crystal Select Bit Allows RTC to Operate
with 6pF or 12.5pF Crystal
114 Bytes User NV RAM
Auxiliary Battery Input
RAM Clear Input
Century Register
32kHz Output for Power Management
32-Bit V
CC
Powered Elapsed Time Counter
32-Bit V
BAT
Powered Elapsed Time Counter
16-Bit Power Cycle Counter
Compatible with Existing BIOS for Original
DS1287 Functions
Available as IC (DS1689) or Stand-Alone
Module with Embedded Battery and Crystal
(DS1693)
Available in Industrial Temperature
Version
Timekeeping Algorithm Includes Leap Year
Compensation Valid Up to 2100
PIN CONFIGURATIONS
V
BAUX
N.C.
N.C.
RCLR
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
PWR
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CEI
CEO
V
CCI
V
CCO
SQW
N.C.
IRQ
PSEL
RD
N.C.
WR
ALE
CS
KS
V
BAUX
X1
X2
RCLR
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
PWR
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CEI
CEO
V
CCI
V
CCO
SQW
V
BAT
IRQ
PSEL
RD
GND
WR
ALE
CS
KS
DS1693
Encapsulated DIP
(740 Mils)
SO
(330 Mils)
ORDERING INFORMATION
PART
DS1689S
DS1689S+
DS1689SN
DS1689SN+
DS1689S/T&R
DS1689S+T&R
DS1689SN/T&R
DS1689SN+T&R
DS1693
TEMP RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
VOLTAGE (V)
3 to 5
3 to 5
3 to 5
3 to 5
3 to 5
3 to 5
3 to 5
3 to 5
3 to 5
PIN-PACKAGE
28 SO (0.330″)
28 SO (0.330″)
28 SO (0.330″)
28 SO (0.330″)
28 SO (0.330″)/Tape & Reel
28 SO (0.330″)/Tape & Reel
28 SO (0.330″)/Tape & Reel
28 SO (0.330″)/Tape & Reel
28 EDIP (0.740″)
TOP MARK*
DS1689S
DS1689S
DS1689S
DS1689S
DS1689S
DS1689S
DS1689S
DS1689S
DS1693
+
Denotes a lead-free/RoHS-compliant device.
*
A “+” anywhere on the top mark denotes a lead-free/RoHS-compliant device. An “N” denotes an industrial temperature device.
1 of 36
DS1689
REV: 112105
DALLAS [ DALLAS SEMICONDUCTOR ]
