參數(shù)資料
型號(hào)： DS12885Q+T&R
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 21/22頁(yè)
文件大?。?/td> 0K
描述： IC RTC W/RAM 128 BYTE 28-PLCC
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 500
類型： 時(shí)鐘/日歷
特點(diǎn)： 警報(bào)器，夏令時(shí)，閏年，NVSRAM，方波輸出
存儲(chǔ)容量： 114B
時(shí)間格式： HH:MM:SS（12/24 小時(shí)）
數(shù)據(jù)格式： YY-MM-DD-dd
接口： 并聯(lián)
電源電壓： 4.5 V ~ 5.5 V
電壓 - 電源，電池： 2.5 V ~ 4 V
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 28-LCC（J 形引線）
供應(yīng)商設(shè)備封裝： 28-PLCC（11.51x11.51）
包裝： 帶卷 (TR)
DS12885/DS12887/DS12887A/DS12C887/DS12C887A
Real-Time Clocks
8
_____________________________________________________________________
Pin Description
PIN
SO,
PDIP
EDIP
PLCC
TQFP
NAME
FUNCTION
1
2
29
MOT
Motorola or Intel Bus Timing Selector. This pin selects one of two bus types. When
connected to VCC, Motorola bus timing is selected. When connected to GND or
left disconnected, Intel bus timing is selected. The pin has an internal pulldown
resistor.
2—
3
30
X1
3—
4
31
X2
Connections for Standard 32.768kHz Quartz Crystal. The internal oscillator
circuitry is designed for operation with a crystal having a 6pF specified load
capacitance (CL). Pin X1 is the input to the oscillator and can optionally be
connected to an external 32.768kHz oscillator. The output of the internal oscillator,
pin X2, is left unconnected if an external oscillator is connected to pin X1.
4–11
5–10,
12, 14
1, 2, 3,
5, 7, 8,
9, 11
AD0–
AD7
Multiplexed, Bidirectional Address/Data Bus. The addresses are presented during
the first portion of the bus cycle and latched into the device by the falling edge of
AS. Write data is latched by the falling edge of DS (Motorola timing) or the rising
edge of R/W (Intel timing). In a read cycle, the device outputs data during the
latter portion of DS (DS and R/W high for Motorola timing, DS low and R/W high for
Intel timing). The read cycle is terminated and the bus returns to a high-
impedance state as DS transitions low in the case of Motorola timing or as DS
transitions high in the case of Intel timing.
12, 16
12
15, 20
12, 17
GND
Ground
13
16
13
CS
Active-Low Chip-Select Input. The chip-select signal must be asserted low for a
bus cycle in the device to be accessed. CS must be kept in the active state during
DS and AS for Motorola timing and during DS and R/W for Intel timing. Bus cycles
that take place without asserting CS will latch addresses, but no access occurs.
When VCC is below VPF volts, the device inhibits access by internally disabling the
CS input. This action protects the RTC data and the RAM data during power
outages.
14
17
14
AS
Address Strobe Input. A positive-going address-strobe pulse serves to
demultiplex the bus. The falling edge of AS causes the address to be latched
within the device. The next rising edge that occurs on the AS bus clears the
address regardless of whether CS is asserted. An address strobe must
immediately precede each write or read access. If a write or read is performed
with CS deasserted, another address strobe must be performed prior to a read or
write access with CS asserted.
15
19
16
R/W
Read/Write Input. The R/W pin has two modes of operation. When the MOT pin is
connected to VCC for Motorola timing, R/W is at a level that indicates whether the
current cycle is a read or write. A read cycle is indicated with a high level on R/W
while DS is high. A write cycle is indicated when R/W is low during DS. When the
MOT pin is connected to GND for Intel timing, the R/W signal is an active-low
signal. In this mode, the R/W pin operates in a similar fashion as the write-enable
signal (WE) on generic RAMs. Data are latched on the rising edge of the signal.
相關(guān)PDF資料
PDF描述
VI-BNX-IU-S CONVERTER MOD DC/DC 5.2V 200W
VI-24Y-MV-B1 CONVERTER MOD DC/DC 3.3V 99W
DS3231M+TRL IC REAL TIME CLOCK I2C 16SOIC
DS3231MZ+TRL IC RTC I2C 8SOIC
VI-24W-MX-B1 CONVERTER MOD DC/DC 5.5V 75W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS12885S 功能描述:實(shí)時(shí)時(shí)鐘 RTC 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
DS12885S/T&R 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK MULTIPLEXED 114BYTE 24SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC W/RAM 128 BYTE 24-SOIC
DS12885S/T&R 功能描述:IC RTC W/RAM 128 BYTE 24-SOIC RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 實(shí)時(shí)時(shí)鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時(shí)鐘/日歷 特點(diǎn):警報(bào)器，閏年，SRAM 存儲(chǔ)容量:- 時(shí)間格式:HH:MM:SS（12/24 小時(shí)） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件
DS12885S+ 功能描述:實(shí)時(shí)時(shí)鐘 RTC 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
DS12885S+T&R 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK MULTIPLEXED 114BYTE 24SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC W/RAM 128 BYTE 24-SOIC
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*