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參數(shù)資料
| 型號： | X1228V14Z-2.7A |
| 廠商： | INTERSIL CORP |
| 元件分類： | XO, clock |
| 英文描述： | EXT. DISTANCE DATA CABLE 25 CO |
| 中文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO14 |
| 封裝： | ROHS COMPLIANT, PLASTIC, MO-153AC, TSSOP-14 |
| 文件頁數(shù)： | 27/31頁 |
| 文件大?。?/td> | 569K |
| 代理商： | X1228V14Z-2.7A |
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X1228
REV 1.3 3/24/04
Characteristics subject to change without notice.
27 of 31
www.xicor.com
Referring to Figure 16, Vtrip applies to the “Internal
Vcc” node which powers the entire device. This means
that if Vcc is powered down and the battery voltage at
Vback is higher than the Vtrip voltage, then the entire
chip will be running from the battery. If Vback falls to
lower than Vtrip, then the chip shuts down and all out-
puts are disabled except for the oscillator and time-
keeping circuitry. The fact that the chip can be powered
from Vback is not necessarily an issue since standby
current for the RTC devices is <2μA for this mode
(called “main timekeeping current” in the data sheet).
Only when the serial interface is active is there an
increase in supply current, and with Vcc powered
down, the serial interface will most likely be inactive.
One way to prevent operation in battery backup mode
above the Vtrip level is to add a diode drop (silicon
diode preferred) to the battery to insure it is below
Vtrip. This will also provide reverse leakage protection
which may be needed to get safety agency approval.
One mode that should always be avoided is the opera-
tion of the RTC device with Vback greater than both
Vcc and Vtrip (Condition 2d in Table 8). This will cause
the battery to drain quickly as serial bus communica-
tion and non-volatile writes will require higher supplier
current.
PERFORMANCE DATA
I
BACK
Performance
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
I
BACK
vs. Temperature
Multi-Lot Process Variation Data
Temperature °C
-40
25
60
85
I
B
3.3V
1.8V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X1228V14Z-4.5A | 功能描述:IC RTC/CAL/CPU SUP EE 14-TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 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 |
| X1228ZY WAF | 制造商:Intersil Corporation 功能描述: |
| X122K | 制造商:IQD Frequency Products 功能描述:CRYSTAL OSCILLATOR 12.288000MHZ |
| X122-SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| X123-133.33M | 制造商:CONNOR-WINFIELD 制造商全稱:Connor-Winfield Corporation 功能描述:5.0x7.0mm Surface Mount LVCMOS Clock Oscillator Series |
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