DS1689_05 Datasheet, PDF (1/36 Pages) Dallas Semiconductor – 3V/5V Serialized Real-Time Clocks with NV RAM Control

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 1
N.C. 2
N.C. 3
RCLR ⁴
AD0 5
AD1 ⁶
AD2 7
AD3 ⁸
AD4 ⁹
AD5 ¹⁰
AD6 ¹¹
AD7 ¹²
PWR ¹³
GND ¹⁴
28 _CEI
27 _CEO
26 VCCI
25 VCCO
24 SQW
23 N.C.
22 _IRQ
21 _PSEL
20 _RD
19 _N.C.
18 _WR
17 _ALE
16 _CS
15 _KS
Encapsulated DIP
(740 Mils)
V_BAUX
1
28
X1 2
27
X2 3
26
RCLR ⁴
25
AD0 5
24
AD1 ⁶
23
AD2 ⁷
22
AD3 ⁸
21
AD4 9
20
AD5 ^{10 19}
AD6 11 18
AD7 ¹²
17
PWR ¹³
16
GND ¹⁴
15
SO
(330 Mils)
CEI
CEO
V_CCI
V_CCO
SQW
V_BAT
IRQ
PSEL
RD
GND
WR
ALE
CS
KS
ORDERING INFORMATION
PART
TEMP RANGE VOLTAGE (V) PIN-PACKAGE
TOP MARK*
DS1689S
DS1689S+
DS1689SN
DS1689SN+
DS1689S/T&R
DS1689S+T&R
DS1689SN/T&R
DS1689SN+T&R
DS1693
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
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
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″)
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.
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