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參數(shù)資料
| 型號： | MAX6917EO33 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | REAL TIME CLOCK, PDSO20 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, MO-137AD, QSOP-20 |
| 文件頁數(shù)： | 1/31頁 |
| 文件大?。?/td> | 349K |
| 代理商： | MAX6917EO33 |
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General Description
The MAX6917 provides all the features of a real-time
clock (RTC) plus a microprocessor (P) supervisory cir-
cuit, NV RAM controller, and backup-battery monitor
function. In addition, 96 x 8 bits of static RAM are avail-
able for scratchpad storage. The MAX6917 communi-
cates with a P through an I2C-bus-compatible serial
interface.
The real-time clock/calendar provides seconds, min-
utes, hours, day, date, month, and year information.
The end of the month date is automatically adjusted for
months with fewer than 31 days, including corrections
for leap years through 2099. The clock operates in
either 24hr or 12hr format with an AM/PM indicator. A
time/date-programmable alarm function is provided
with an open-drain, active-low alarm output.
The P supervisory circuit features an open-drain,
active-low reset available in three different reset thresh-
olds. A manual reset input and a watchdog function are
included as well.
The NV RAM controller provides power for external SRAM
from a backup battery plus chip-enable gating. The back-
up battery also provides data retention of the on-board 96
x 8 bits of RAM. An open-drain, active-low, battery-on sig-
nal alerts the system when operating from a battery.
The battery-test circuitry periodically tests the backup
battery for a low-battery condition. An optional external
resistor network selects different battery thresholds. A
freshness seal prevents battery drain until the first VCC
power-up.
The MAX6917 has a crystal-fail-detect circuit and a
data-valid bit. The MAX6917 is available in a 20-pin
QSOP package and is guaranteed to operate over the
extended (-40°C to +85°C) temperature range.
Applications
Point-of-Sale Equipment
Programmable Logic Controllers
Intelligent Instruments
Fax Machines
Digital Thermostats
Industrial Control
Features
Real-Time Clock Counts
Seconds, Minutes, Hours, Date,
Month, Day of Week, and Year
with Leap-Year Compensation Through 2099
Fast (400kHz) I2C-Bus-Compatible Interface
96 x 8 Bits of RAM for Scratchpad Data Storage
Uses Standard 32.768kHz, 6pF Load, Watch
Crystal
Single-Byte or Multiple-Byte (Burst Mode) Data
Transfer for Read or Write of Clock Registers or
RAM
Battery Monitor and Low-Battery Warning Output
Internal Default for Lithium Backup-Battery
Testing
Pins Available for Other Backup-Battery
Testing Configurations
Dual Power-Supply Pins for Primary and Backup
Power
Battery-On Output
NV RAM Controller
Chip-Enable Gating (Control of
CE with Reset
and Power Valid)
VOUT for SRAM Power
Microprocessor Supervisor with Watchdog Input
Programmable Time/Date Alarm Output
Data Valid Bit (Loss of All Voltage Alerts User of
Corrupt Data)
Crystal-Fail Detect
Reference Output Frequencies—1Hz and
32.768kHz
Small, 20-Pin, QSOP Surface-Mount Package
MAX6917
I2C-Compatible RTC with Microprocessor
Supervisor, Alarm, and NV RAM Controller
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-3702; Rev 0; 5/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX6917EO30
-40°C to +85°C
20 QSOP
E20-2
MAX6917EO33*
-40°C to +85°C
20 QSOP
E20-2
MAX6917EO50*
-40°C to +85°C
20 QSOP
E20-2
Pin Configuration and Selector Guide appear at end of data
sheet.
Purchase of I2C components from Maxim Integrated Products,
Inc., or one of its sublicensed Associate Companies, conveys a
license under the Philips I2C Patent Rights to use these com-
ponenets in an I2C system, provided that the system conforms to
the I2C Standard Specification as defined by Philips.
*Future product—contact factory for availability.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6917EO33+ | 功能描述:實(shí)時時鐘 Integrated Circuits (ICs) 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 |
| MAX6917EO33+T | 功能描述:實(shí)時時鐘 Integrated Circuits (ICs) 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 |
| MAX6917EO50 | 功能描述:實(shí)時時鐘 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 |
| MAX6917EO50+ | 功能描述:實(shí)時時鐘 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 |
| MAX6917EO50+T | 功能描述:實(shí)時時鐘 Integrated Circuits (ICs) 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 |
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