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CS8140 数据表(PDF) 3 Page - Cherry Semiconductor Corporation

部件名 CS8140
功能描述  5V, 500mA Linear Regulator with ENABLE, , and Watchdog RESET
Download  12 Pages
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制造商  CHERRY [Cherry Semiconductor Corporation]
网页  http://www.cherrycorp.com/
标志 CHERRY - Cherry Semiconductor Corporation

CS8140 数据表(HTML) 3 Page - Cherry Semiconductor Corporation

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3
Package Lead Description
Package Lead #
Lead Symbol
Function
Electrical Characteristics: continued
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
s
Threshold
HIGH VR(HI)
VOUT increasing
4.65
4.90
VOUT - 0.05
V
LOW VR(LOW)
VOUT decreasing
4.50
4.70
4.90
V
Threshold Hysteresis(VRH)
(HIGH - LOW)
150
200
250
mV
Reset Output Leakage
VOUT ³VR(HI)
25
µA
= HIGH
Output Voltage
Low(VL(LOW) )
1V ² VOUT ²VR(LOW)
0.1
0.4
V
Rp = 2.7k½*
Low (VRpeak )VOUT, Power up, Power down
0.6
1.0
V
Delay Times
CDELAY = 0.1µF
tPOR
30.0
47.5
65.0
ms
tWDI(
)
0.5
1.0
1.5
ms
s Watchdog
Input Voltage
HIGH
2.0
V
LOW
0.8
V
Input Current
WDI ² VOUT
010
µA
Threshold Frequency
CDELAY = 0.1µF
fWDI
LOWER
64
77
96
Hz
fWDI(UPPER)**
218
262
326
Hz
* RP is connected to
and VOUT.
** CS8140 only
To observe safe operating junction temperature, low duty cycle pulse testing is used on tests where applicable.
RESET
RESET
RESET
RESET
7 Lead
24 Lead *
14 Lead
TO-220
SOIC Wide
PDIP
121
12
VIN
Supply voltage to IC, usually direct from the battery.
2
23
13
ENABLE
CMOS compatible logical input. VOUT is disabled when
ENABLE is LOW and WDI is beyond its preset limits.
3
24
14
CMOS compatible output lead.
goes low whenever
VOUT drops below 4.5% of its typical value for more than
2µs or WDI signal falls outside itÕs window limits.
4
12, 20
11
Gnd
Ground connection.
5
2
1
Delay
Timing capacitor for Watchdog and
functions.
6
3
2
WDI
CMOS compatible input lead. The Watchdog function mon-
itors the falling edge of the incoming digital pulse train. The
signal is usually generated by the system microprocessor.
74
3
VOUT
Regulated output voltage, 5V (typ).
N/A
5
4
Sense
Kelvin connection which allows remote sensing of output
voltage for improved regulation.
1,6-11,13-19,22
5-10
NC
No connection.
* The CS8141 uses a fused lead package. Leads 6-8 and 17-19 are fused together through the lead frame. These leads are
electrically connected to IC ground and should be connected to system ground for a good thermal connection.
RESET
RESET
RESET


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