參數(shù)資料
型號(hào)： DS1742W-150
廠商： DALLAS SEMICONDUCTOR
元件分類： Timer or RTC
英文描述： 0 TIMER(S), REAL TIME CLOCK, DMA24
封裝： DIP-24
文件頁數(shù)： 1/12頁
文件大小： 162K
代理商： DS1742W-150
1 of 12
022301
FEATURES
Integrated NV SRAM, real time clock,
crystal, power-fail control circuit and lithium
energy source
Clock registers are accessed identical to the
static RAM. These registers are resident in
the eight top RAM locations
Century byte register
Totally nonvolatile with over 10 years of
operation in the absence of power
BCD coded century, year, month, date, day,
hours, minutes, and seconds with automatic
leap year compensation valid up to the year
2100
Battery voltage level indicator flag
Power-fail write protection allows for
±10%
VCC power supply tolerance
Lithium energy source is electrically
disconnected to retain freshness until power is
applied for the first time
Standard JEDEC bytewide 2k x 8 static RAM
pinout
Quartz accuracy
±1 minute a month @ 25°C,
factory calibrated
PIN ASSIGNMENT
PIN DESCRIPTION
A0-A10
- Address Inputs
CE
- Chip Enable
OE
- Output Enable
WE
- Write Enable
VCC
- Power Supply Input
GND
- Ground
DQ0-DQ7
- Data Input/Outputs
ORDERING INFORMATION
DS1742-XXX
(5V)
-70
70 ns access
-100
100 ns access
DS1742W-XXX
(3.3V)
-120
120 ns access
-150
150 ns access
DESCRIPTION
The DS1742 is a full function, year 2000-compliant (Y2KC), real-time clock/calendar (RTC) and 2k x 8
non-volatile static RAM. User access to all registers within the DS1742 is accomplished with a bytewide
interface as shown in Figure 1. The Real Time Clock (RTC) information and control bits reside in the
eight uppermost RAM locations. The RTC registers contain century, year, month, date, day, hours,
minutes, and seconds data in 24-hour BCD format. Corrections for the day of the month and leap year
are made automatically.
DS1742
Y2KC Nonvolatile Timekeeping RAM
www.dalsemi.com
VCC
A8
A9
WE
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
1
2
3
4
5
6
7
8
9
10
11
12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
24
23
22
21
20
19
18
17
16
15
14
13
相關(guān)PDF資料
PDF描述
DS1743P-70 0 TIMER(S), REAL TIME CLOCK, DMA34
DS1743-70 0 TIMER(S), REAL TIME CLOCK, DMA28
DS1743W-120 0 TIMER(S), REAL TIME CLOCK, DMA28
DS9034PCX 0 TIMER(S), REAL TIME CLOCK, DMA34
DS1743-100 0 TIMER(S), REAL TIME CLOCK, DMA28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1742W-150+ 功能描述:實(shí)時(shí)時(shí)鐘 Timekeeping NV RAM 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
DS1743 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Y2K-Compliant, Nonvolatile Timekeeping
DS1743-100 功能描述:實(shí)時(shí)時(shí)鐘 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
DS1743-100 IND 功能描述:實(shí)時(shí)時(shí)鐘 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
DS1743-100+ 功能描述:實(shí)時(shí)時(shí)鐘 Timekeeping NV RAM 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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