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參數(shù)資料
| 型號： | DS1677E |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
| 封裝： | 4.40 MM, TSSOP-20 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大?。?/td> | 224K |
| 代理商： | DS1677E |
1 of 18
REV: 080905
GENERAL DESCRIPTION
The DS1677 portable system controller is a
circuit that incorporates many of the functions
necessary for low-power portable products
integrated into one chip. The device provides a
real-time clock (RTC), NV RAM controller,
microprocessor monitor, power-fail warning, and
a 3-channel, 8-bit analog-to-digital converter
(ADC). Communication with the DS1677 is
established through a simple 3-wire interface.
The 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 DS1677
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.
Automatic backup and write protection of an
external SRAM is provided through the VCCO and
CEO pins. The backup energy source used to
power the RTC is also used to retain RAM data in
the absence of VCC through the VCCO pin. CEO,
the chip-enable output to SRAM, is controlled
during
power
transients
to
prevent
data
corruption.
ORDERING INFORMATION
PART*
VOLTAGE
(V)
PIN-
PACKAGE
TOP MARK
DS1677E
5.0
20 TSSOP
DS1677-5
DS1677E+
5.0
20 TSSOP
DS1677-5
* All devices are specified over the 0°C to +70°C operating range.
A “‘+” anywhere on the top mark denotes a lead(Pb)-free device.
+ Denotes a lead(Pb)-free/RoHS-compliant device.
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
Microprocessor
NV RAM Control
Automatic Battery Backup and Write
Protection to External SRAM
3-Channel, 8-Bit ADC
Simple 3-Wire Interface
+5.0V Operation
1.25V Threshold Detector for Power-Fail
Warning
UL Recognized
PIN CONFIGURATION
DS1677
Portable System Controller
www.maxim-ic.com
TSSOP
4.4mm
VBAT
VCCO
SCLK
I/O
CS
CEI
CEO
N.C.
INT
GND
ST
VCC
X1
X2
AIN0
AIN1
AIN2
RST
PFI
PFO
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
TOP VIEW
DS1677
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1677E+ | 功能描述:實時時鐘 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS1677E-5 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Portable System Controller(275.85 k) |
| DS1678 | 功能描述:實時時鐘 Real-Time Event Recorder 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS1678+ | 功能描述:實時時鐘 Real-Time Event Recorder 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS1678J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-Input Digital Multiplexer |
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