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參數(shù)資料
| 型號(hào)： | DS1670 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | XO, clock |
| 英文描述： | Portable System Controller(便攜式系統(tǒng)控制器) |
| 中文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大?。?/td> | 123K |
| 代理商： | DS1670 |
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DS1670
Portable System Controller
DS1670
030598 1/16
FEATURES
Provides real time clock:
– Counts seconds, minutes, hours, date of the
month, month, day of the week, and year with
leap year compensation valid up to 2100
– Power control circuitry supports system power
on from day/time alarm
Microprocessor monitor:
– Halts microprocessor during power fail
– Automatically restarts microprocessor after
power failure
– Monitors pushbutton for external override
– Halts and resets an out of control microproces-
sor
NVRAM control:
– Automatic battery backup and write protection to
external SRAM
3–channel, 8–bit analog–to–digital converter
Simple three–wire interface
3.3 volt operation
PIN ASSIGNMENT
ST
V
CC
X1
X2
AIN0
AIN1
AIN2
RST
BLE
BHE
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
20–PIN TSSOP
20–PIN SOIC
DESCRIPTION
The Portable System Controller is a circuit which incor-
porates many of the functions necessary for low power
portable products integrated into one chip. The DS1670
provides a Real Time Clock, NVRAM controller, micro-
processor monitor, and a 3–channel 8–bit analog–to–
digital converter. Communication with the DS1670 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 DS1670 is pow-
ered 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.
Automatic backup and write protection of external
SRAM is provided through the V
CCO
, CEOL, and CEOH
pins. The backup energy source used to power the RTC
is also used to retain RAM data in the absence of V
CC
through the V
CCO
pin. The chip enable outputs to RAM
(CEOL and CEOH) are controlled during power tran-
sients to prevent data corruption.
The microprocessor monitor circuitry of the DS1670
provides three basic functions. First, a precision tem-
perature–compensated reference and comparator cir-
cuit monitors the status of V
CC
. When an out–of–toler-
ance condition occurs, an internal power fail signal is
generated which forces the reset to the active state.
When V
CC
returns to an in–tolerance condition, the
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1670E | 功能描述:實(shí)時(shí)時(shí)鐘 Portable System Controller RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1670E/T&R | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 20TSSOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CTRLR SYSTEM PORTABLE 20TSSOP 制造商:Maxim Integrated Products 功能描述:Real Time Clock Portable System Controller |
| DS1670E/T&R | 功能描述:實(shí)時(shí)時(shí)鐘 Portable System Controller RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1670E/TR | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Portable System Controller |
| DS1670E+ | 功能描述:實(shí)時(shí)時(shí)鐘 Portable System Controller RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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