參數(shù)資料
型號(hào)： BQ4845S
英文描述： Fast Recovery Glass Passivated Rectifier Diodes
中文描述： 實(shí)時(shí)時(shí)鐘
文件頁(yè)數(shù)： 11/20頁(yè)
文件大?。?/td> 1155K
代理商： BQ4845S
11
DC Electrical Characteristics
(TA= TOPR, VCCmin
≤
VCC
≤
VCCmax)
Symbol
I
LI
Parameter
Minimum
-
Typical
-
Maximum
±
1
Unit
μ
A
Conditions/Notes
V
IN
= V
SS
to V
CC
CS = V
IH
or OE = V
IH
or WE
= V
IL
I
OH
= -2.0 mA
V
BC
> V
CC
, I
OH
= -10
μ
A
I
OL
= 4.0 mA
Min. cycle, duty = 100%,
CS = V
IL
, I
I/O
= 0mA
CS = V
IH
CS
≥
V
CC
- 0.2V,
0V
≤
V
IN
≤
0.2V,
or V
IN
≥
V
CC
- 0.2V
Input leakage current
I
LO
Output leakagecurrent
-
-
±
1
μ
A
V
OH
V
OHB
V
OL
Output high voltage
V
OH,
BC Supply
Output low voltage
2.4
-
-
-
-
-
V
V
V
V
BC
- 0.3
-
0.4
I
CC
Operating supply current
-
12
25
mA
I
SB1
Standby supply current
-
3
-
mA
I
SB2
Standby supply current
-
1.5
-
mA
V
SO
Supply switch-over voltage
-
V
BC
-
V
I
CCB
Battery operation current
-
0.3
0.5
μ
A
V
= 3V, T
A
= 25°C, no load
on V
OUT
or CE
OUT
bq4845
bq4845Y
I
OUT
= 100mA, V
CC
> V
BC
I
OUT
= 100
μ
A, V
CC
< V
BC
I
RST
= 4mA
I
INT
= 4mA
I
SINK
= 4mA
I
SOURCE
= 2mA
0 < V
WDI
< 0.8V
2.2 < V
WDI
< V
CC
V
PFD
Power-fail-detect voltage
Power-fail-detect voltage
V
OUT
voltage
V
OUT
voltage
RST output voltage
INT output voltage
4.55
4.30
4.62
4.37
-
-
-
-
-
-
-10
20
4.75
4.5
-
-
0.4V
0.4V
0.4V
-
-
50
V
V
V
V
-
-
-
-
V
OUT1
V
OUT2
V
RST
V
INT
V
CC
- 0.3V
V
BC
- 0.3V
-
-
-
2.4
-50
-
V
WDO
WDO output voltage
I
WDIL
I
WDIH
Watchdog input low current
Watchdog input high current
μ
A
μ
A
Notes:
Typical values indicate operation at T
A
= 25°C, V
CC
= 5V.
RST and INT are open-drain outputs.
Crystal Specifications
(DT-26 or Equivalent)
Symbol
f
O
C
L
T
P
k
Q
R
1
C
0
C
0
/C
1
D
L
f/f
O
Parameter
Minimum
-
-
20
-
40,000
-
-
-
-
-
Typical
32.768
6
25
-
70,000
-
1.1
430
-
1
Maximum
-
-
30
-0.042
-
45
1.8
600
1
-
Unit
kHz
pF
°C
ppm/°C
Oscillation frequency
Load capacitance
Temperature turnover point
Parabolic curvature constant
Quality factor
Series resistance
Shunt capacitance
Capacitance ratio
Drive level
Aging (first year at 25°C)
K
pF
μ
W
ppm
Aug. 1995
bq4845/bq4845Y
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
BQ4845S- 制造商:TI 制造商全稱:Texas Instruments 功能描述:Parallel RTC With CPU Supervisor
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BQ4845S-A4G4 功能描述:實(shí)時(shí)時(shí)鐘 w/NVSRAM Control Watchdog Timer 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
BQ4845S-A4N 功能描述:實(shí)時(shí)時(shí)鐘 w/NVSRAM Control Watchdog Timer 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
BQ4845S-A4NG4 功能描述:實(shí)時(shí)時(shí)鐘 w/NVSRAM Control Watchdog Timer 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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