ds1685en-5t-r Maxim Integrated Products, Inc., ds1685en-5t-r Datasheet
ds1685en-5t-r
Manufacturer Part Number
ds1685en-5t-r
Description
3v/5v Real-time Clock
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS1685EN-5T-R.pdf
(39 pages)
FEATURES
Incorporates Industry-Standard DS1287 PC Clock
plus Enhanced Features Such as: Y2K Compliant
APPLICATIONS
Embedded Systems
Utility Meters
Security Systems
Network Hubs, Bridges, and Routers
PIN CONFIGURATIONS
www.maxim-ic.com
TOP VIEW
+3V or +5V Operation
64-Bit Silicon Serial Number
Power-Control Circuitry Supports System
Power-On from Date/Time Alarm or Key
Closure
32kHz Output for Power Management
Crystal-Select Bit Allows RTC to Operate with
6pF or 12.5pF Crystal
SMI Recovery Stack
242 Bytes Battery-Backed NV RAM
Auxiliary Battery Input
X2
AD0
AD1
AD3
AD4
AD5
AD6
AD7
PWR
X1
AD2
GND
1
2
3
4
5
6
7
8
9
10
11
12
TSSOP (0.173″)
DIP (0.600″)/
SO (0.300″)/
DS1685/
DS1685S/
DS1685E
24
23
22
21
20
19
18
17
16
15
14
13
SQW
V
RCLR
GND
ALE
IRQ
V
RD
CS
WR
V
KS
BAUX
CC
BAT
AD4
AD0
AD1
AD2
AD3
AD5
N.C.
1 of 39
5
6
7
8
9
10
11
12
4
DS1685Q
13 14
3
PLCC
2
15 16
1
28
27
17
26
18
RAM Clear Input
Century Register
Date Alarm Register
Compatible with Existing BIOS for Original
DS1287 Functions
Available as Chip (DS1685) or Stand-Alone
Encapsulated DIP (EDIP) with Embedded
Battery and Crystal (DS1687)
Timekeeping Algorithm Includes Leap-Year
Compensation Valid Through 2099
Underwriters Laboratory (UL) Recognized
25
24
23
22
21
20
19
3V/5V Real-Time Clocks
RCLR
V
KS
RD
GND
WR
IRQ
BAT
PWR
AD0
AD1
AD3
AD4
AD5
AD6
AD7
AD2
GND
N.C.
N.C.
DS1685/DS1687
1
2
3
4
5
6
7
8
9
10
11
12
EDIP (0.740″)
DS1687
REV: 112105
24
23
22
21
20
19
18
17
16
15
14
13
SQW
V
RCLR
ALE
IRQ
V
RD
N.C.
CS
N.C.
WR
KS
BAUX
CC
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