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DS1693 Datasheet دیتاشیت PDF دانلود

دیتاشیت - Dallas Semiconductor - (DS1689 / DS1693) 3-Volt/5-Volt Serialized Real-Time Clock

شماره قطعه DS1693
شرح مفصل (DS1689 / DS1693) 3-Volt/5-Volt Serialized Real-Time Clock
تولید کننده Dallas Semiconductor 
آرم Dallas Semiconductor 


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DS1693 شرح
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DS1689/DS1693
3-Volt/5-Volt Serialized Real-Time Clock
with NV RAM Control
FEATURES
Incorporates industry standard DS1287 PC clock
plus enhanced features:
§ +3- 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
6 pF or 12.5 pF crystal
§ 114 bytes user NV RAM
§ Auxiliary battery input
§ RAM clear input
§ Century register
§ 32 kHz output for power management
§ 32-bit VCC powered elapsed time counter
§ 32-bit VBAT powered elapsed time counter
§ 16-bit power cycle counter
§ Compatible with existing BIOS for original
DS1287 functions
§ Available as IC (DS1689) or standalone
module with embedded battery and crystal
(DS1693)
§ IC is available in industrial temperature
version
§ Timekeeping algorithm includes leap year
compensation valid up to 2100
ORDERING INFORMATION
PART #
DS1689S
DS1689SN
DS1693
DESCRIPTION
RTC IC, 28-pin SOIC
RTC IC, 28-pin SOIC IND
RTC Module; 28-pin DIP
PIN ASSIGNMENT
VBAUX
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 CEI
27 CEO
26 VCCI
25 VCCO
24 SQW
23 NC
22 IRQ
21 PSEL
20 RD
19 NC
18 WR
17 ALE
16 CS
15 KS
VBAUX
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 CEI
27 CEO
26
25
VCCI
VCCO
24 SQW
23 VBAT
22 IRQ
21 PSEL
20 RD
19 GND
18 WR
17 ALE
16 CS
15 KS
DS1693 28-Pin Encapsulated Package DS1689S 28-Pin SOIC
(740-mil)
(330-mil)
PIN DESCRIPTION
X1 - Crystal Input
X2 - Crystal Output
RCLR
- RAM Clear Input
AD0-AD7 - Mux’ed Address/Data Bus
PWR - Power-on Interrupt Output
(Open drain)
KS - Kickstart Input
CS - RTC Chip Select Input
ALE - RTC Address Strobe
WR - RTC Write Data Strobe
RD
VCCO
IRQ
SQW
VCCI
GND
VBAT
VBAUX
PSEL
- 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
CEI - RAM Chip Enable In
CEO - RAM Chip Enable Out
1 of 32
092800

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