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DS1689 Datasheet

  • DS1689

  • 3-Volt/5-Volt Serialized Real Time Clock with NV RAM Control

  • 376.79KB

  • Dallas   Dallas

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DS1689/DS1693
3-Volt/5-Volt Serialized Real-Time Clock
with NV RAM Control
www.maxim-ic.com
FEATURES
Incorporates industry standard DS1287 PC clock
plus enhanced features:
搂
+3- or +5V operation
搂
64-bit silicon serial number
搂
64-bit customer specific ROM or additional
serial number available
搂
Power control circuitry supports system
power-on from date/time alarm or key closure
搂
Automatic battery backup and write
protection to external SRAM
搂
Crystal select bit allows RTC to operate with
6 pF or 12.5 pF crystal
搂
114 bytes user NV RAM
搂
Auxiliary battery input
搂
RAM clear input
搂
Century register
搂
32 kHz output for power management
搂
32-bit V
CC
powered elapsed time counter
搂
32-bit V
BAT
powered elapsed time counter
搂
16-bit power cycle counter
搂
Compatible with existing BIOS for original
DS1287 functions
搂
Available as IC (DS1689) or standalone
module with embedded battery and crystal
(DS1693)
搂
IC is available in industrial temperature
version
搂
Timekeeping algorithm includes leap year
compensation valid up to 2100
PIN ASSIGNMENT
V
BAUX
NC
NC
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
NC
IRQ
PSEL
RD
NC
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 28-Pin Encapsulated Package DS1689S 28-Pin SOIC
(740-mil)
(330-mil)
PIN DESCRIPTION
X1
X2
RCLR
AD0-AD7
PWR
KS
CS
ALE
WR
RD
V
CCO
IRQ
ORDERING INFORMATION
PART #
DS1689S
DS1689SN
DS1693
DESCRIPTION
RTC IC, 28-pin SOIC
RTC IC, 28-pin SOIC IND
RTC Module; 28-pin DIP
SQW
V
CCI
GND
V
BAT
V
BAUX
PSEL
CEI
CEO
- Crystal Input
- Crystal Output
- RAM Clear Input
- Mux鈥檈d Address/Data Bus
- Power-on Interrupt Output
(Open drain)
- Kickstart Input
- RTC Chip Select Input
- RTC Address Strobe
- RTC Write Data Strobe
- RTC Read Data Strobe
- RAM Power Supply Output
- Interrupt Request Output
(Open drain)
- Square Wave Output
- +3- or +5V Main Supply
- Ground
- Battery + Supply
- Auxiliary Battery Supply
- +3- or +5V Power Select
- RAM Chip Enable In
- RAM Chip Enable Out
1 of 32
092800

DS1689 PDF文件相关型号

DS1693

DS1689 产品属性

  • 13

  • 集成电路 (IC)

  • 时钟/计时 - 实时时钟

  • -

  • 时钟/日历

  • NVSRAM

  • 114B

  • HH:MM:SS（12/24 小时）

  • YY-MM-DD-dd

  • 并联

  • 2.7 V ~ 3.3 V，4.5 V ~ 5.5 V

  • 2.5 V ~ 3.7 V

  • 0°C ~ 70°C

  • 通孔

  • 28-DIP（0.600"，15.24mm）

  • 28-PDIP

  • 管件

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