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DS17885 Datasheet دیتاشیت PDF دانلود

دیتاشیت - Dallas - (DS17886 / DS17887) 3V/5V Real-Time Clock

شماره قطعه DS17885
شرح مفصل (DS17886 / DS17887) 3V/5V Real-Time Clock
تولید کننده Dallas 
آرم Dallas 


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DS17885 شرح
www.maxim-ic.com
FEATURES
Incorporates industry standard DS1287 PC clock
plus enhanced features:
§ Y2K compliant
§ +3V or +5V operation
§ SMI recovery stack
§ 64-bit silicon serial number
§ Power-control circuitry supports system
power-on from date/time alarm or key
closure
§ 32kHz output on power-up
§ Crystal select bit allows RTC to operate with
6pF or 12.5pF crystal
§ 114 bytes user NV RAM
§ Auxiliary battery input
§ 8kB additional NV RAM
§ RAM clear input
§ Century register
§ Date alarm register
§ Compatible with existing BIOS for original
DS1287 functions
§ Available as chip (DS17885) or standalone
module with embedded battery and crystal
(DS17887)
§ Timekeeping algorithm includes leap-year
compensation valid up to 2100
§ Underwriters Laboratory (UL) recognized
TYPICAL OPERATING CIRCUIT
DS17885/DS17887
3V/5V Real-Time Clock
PIN ASSIGNMENT
PWR
X1
X2
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
GND
1
2
3
4
5
6
7
8
9
10
11
12
24 VCC
23 SQW
22 VBAUX
21 RCLR
20 VBAT
19 IRQ
18 KS
17 RD
16 GND
15 WR
14 ALE
13 CS
DS17885 24-Pin DIP
DS17885S 24-Pin SO
PWR
NC
NC
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
GND
1
2
3
4
5
6
7
8
9
10
11
12
24 VCC
23 SQW
22 VBAUX
21 RCLR
20 NC
19 IRQ
18 KS
17 RD
16 NC
15 WR
14 ALE
13 CS
DS17887 24-Pin
Encapsulated Package
IRQ
VBAT
RCLR
VBAUX
SQW
VCC
VCC
PWR
X1
X2
NC
ADO
AD1
AD2
1 28
2 27
3 26
4 25
5 24
6 23
7 22
8 21
9 20
10 19
11 18
12 17
13 16
14 15
DS17885E 28-Pin TSOP
KS
RD
GND
WR
ALE
CS
GND
GND
AD7
AD6
NC
AD5
AD4
AD3
1 of 38
050802

قانون اساسیصفحه 30
دانلود [ DS17885 دیتاشیت ]



دیتاشیت توصیه

شماره قطعه شرح مفصل تولید کنندگان
DS17885 (DS17886 / DS17887) 3V/5V Real-Time Clock Dallas
Dallas

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