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DS1685QN-3

Description
1 TIMER(S), REAL TIME CLOCK, PQCC28
CategoryThe embedded processor and controller    Microcontrollers and processors   
File Size763KB,39 Pages
ManufacturerDALLAS
Websitehttp://www.dalsemi.com
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DS1685QN-3 Overview

1 TIMER(S), REAL TIME CLOCK, PQCC28

DS1685QN-3 Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerDALLAS
package instructionPLASTIC, LCC-28
Reach Compliance Codeunknow
maximum clock frequency3.8 MHz
External data bus width8
Information access methodsPARALLEL, MUXED BUS
JESD-30 codeS-PQCC-J28
JESD-609 codee0
Number of terminals28
Number of timers1
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeQCCJ
Encapsulate equivalent codeLDCC28,.5SQ
Package shapeSQUARE
Package formCHIP CARRIER
power supply3 V
Certification statusNot Qualified
Maximum supply voltage3.7 V
Minimum supply voltage2.7 V
Nominal supply voltage3 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formJ BEND
Terminal pitch1.27 mm
Terminal locationQUAD
shortest timeSECONDS
VolatileYES
uPs/uCs/peripheral integrated circuit typeTIMER, REAL TIME CLOCK
DS1685/DS1687
3V/5V Real-Time Clocks
www.maxim-ic.com
FEATURES
Incorporates Industry-Standard DS1287 PC Clock
plus Enhanced Features Such as: Y2K Compliant
+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
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
APPLICATIONS
Embedded Systems
Utility Meters
Security Systems
Network Hubs, Bridges, and Routers
PIN CONFIGURATIONS
TOP VIEW
PWR
X1
X2
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
GND
1
2
24
23
V
CC
X2
X1
PWR
N.C.
V
CC
SQW
PWR
1
2
3
4
5
6
7
8
9
10
11
12
24
V
CC
SQW
V
BAUX
RCLR
N.C.
IRQ
KS
RD
N.C.
WR
ALE
CS
DS1685/
3
DS1685S/
22
4
DS1685E
21
5
6
7
8
9
10
11
12
20
19
18
17
16
15
14
13
V
BAUX
RCLR
V
BAT
IRQ
KS
RD
GND
WR
ALE
CS
AD0
AD1
AD2
AD3
AD4
AD5
N.C.
5
6
7
8
9
V
BAUX
SQW
N.C.
N.C.
RCLR
V
BAT
IRQ
KS
RD
GND
WR
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
GND
DS1687
23
22
21
20
19
18
17
16
15
14
13
4
3
2
1
28
27
26
25
24
23
22
21
20
19
DS1685Q
10
11
12
13 14
15 16
17
18
DIP (0.600″)/
SO (0.300″)/
TSSOP (0.173″)
AD6
N.C.
AD7
GND
CS
ALE
N.C.
PLCC
EDIP (0.740″)
1 of 39
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