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DS1673 Datasheet

  • DS1673

  • Portable System Controller

  • Dallas   Dallas

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DS1673
Portable System Controller
www.dalsemi.com
FEATURES
Provides Real Time Clock:
鈥?Counts seconds, minutes, hours, date of
the month, month, day of the week, and
year with leap year compensation valid up
to 2100
鈥?Power control circuitry supports system
power on from day/time alarm
Microprocessor monitor:
鈥?Halts microprocessor during power-fail
鈥?Automatically restarts microprocessor
after power failure
鈥?Monitors pushbutton for external override
鈥?Halts and resets an out of control
microprocessor
NV RAM control:
鈥?Automatic battery backup and write
protection to external SRAM
3-channel, 8-bit analog-to-digital converter
Simple 3-wire interface
+3.0 or +5.0V operation
PIN ASSIGNMENT
V
BAT
V
CCO
SCLK
I/O
CS
CEI
CEOL
CEOH
INT
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
ST
V
CC
X1
X2
AIN0
AIN1
AIN2
RST
BLE
BHE
20-Pin TSSOP
20-Pin SOIC
ORDERING INFORMATION
DS1673E - X
DS1673S - X
20-Pin TSSOP
20-Pin SOIC
3 +3V operation
5 +5V operation
DESCRIPTION
The Portable System Controller is a circuit which incorporates many of the functions necessary for low
power portable products integrated into one chip. The DS1673 provides a Real Time Clock, NV RAM
controller, microprocessor monitor, and a 3-channel, 8-bit analog-to-digital converter. Communication
with the DS1673 is established through a simple 3-wire interface.
The Real Time Clock (RTC) provides seconds, minutes, hours, day, date, month, and year information
with leap year compensation. The RTC also provides an alarm interrupt. This interrupt works when the
DS1673 is powered by the system power supply or when in battery backup operation so the alarm can be
used to wake up a system that is powered down.
1 of 20
050200

DS1673 PDF文件相關(guān)型號(hào)

DS1673E-3,DS1673E-5,DS1673S-3,DS1673S-5

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