參數(shù)資料
型號(hào)： BQ4847Y
英文描述： Fast Recovery Glass Passivated Rectifier Diodes
中文描述： 時(shí)鐘模塊CPU監(jiān)控
文件頁(yè)數(shù)： 16/20頁(yè)
文件大?。?/td> 1155K
代理商： BQ4847Y
16
Power-Down/Power-Up Timing
(TA= TOPR)
Symbol
t
F
Parameter
Minimum
300
Typical
-
Maximum
-
Unit
μ
s
Conditions
V
CC
slew from 4.75 to
4.25V
V
CC
slew from 4.25 to V
SO
V
CC
slew from V
SO
to
V
PFD(MAX)
Interrupt delay from
V
PFD
t
FS
10
-
-
μ
s
t
R
100
-
-
μ
s
t
PF
6
-
24
μ
s
t
WPT
Write-protect timefor
external RAM
90
100
125
μ
s
Delay after V
CC
slews down past
V
PFD
beforeSRAM is write-protected
and RST activated.
Internal write-protection period af-
ter V
CC
passes V
PFD
on power-up.
Reset active time-out period
Time during which external SRAM
is write-protected after V
CC
passes
V
PFD
on power-up.
t
CSR
CS at V
IH
after power-up
100
200
300
ms
t
RST
V
PFD
to RST inactive
t
CSR
-
t
CSR
ms
t
CER
Chip enable recovery
time
Chip enable propagation
delay to external SRAM
t
CSR
-
t
CSR
ms
t
CED
-
9
12
ns
Output load A
Caution:
Negative undershoots below the absolute maximum rating of -0.3V in battery-backup mode
may affect data integrity.
Aug. 1995
Power-Down/Power-Up Timing
Notes:
PWRIE set to “1” to enable power fail interrupt.
RST and INT are open drain and require an external pull-up resistor.
bq4845/bq4845Y
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PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
BQ4847YMT 功能描述:實(shí)時(shí)時(shí)鐘 RTC with NVSRAM 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
BQ4847Y-MT 制造商:TI 制造商全稱:Texas Instruments 功能描述:RTC Module With CPU Supervisor
BQ4850Y 制造商:TI 制造商全稱:Texas Instruments 功能描述:RTC Module With 512Kx8 NVSRAM
BQ4850Y_13 制造商:TI 制造商全稱:Texas Instruments 功能描述:RTC Module With 512Kx8 NVSRAM
BQ4850YMA-85 功能描述:實(shí)時(shí)時(shí)鐘 RTC Module 512Kx8 NVSRAM 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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