KA7542 [FAIRCHILD]
Power Supply Support Circuit, Fixed, 1 Channel, +4.2VV, BIPolar, PBCY3, TO-92, 3 PIN;
| 型号： | KA7542 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Power Supply Support Circuit, Fixed, 1 Channel, +4.2VV, BIPolar, PBCY3, TO-92, 3 PIN |
| 文件： | 总5页 (文件大小：51K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
KA75XXX
VOLTAGE DETECTOR
VOLTAGE DETECTOR
TO-92
The KA75250/270/290/310/33/36/39/42/45 prevents error of system
from supply voltage below normal voltage level at the time the power
on and instantaneous power off in systems.
FEATURES
•
•
•
Detecting against error operations at the power ON/OFF.
Resetting function for the low voltage microprocessor.
Checking low battery
1.Input 2.GND 3.Output
BLOCK DIAGRAM
ORDERING INFORMATION
1
PKG
Operating Temp.
Device
KA75250
KA75270
KA75290
KA75310
KA7533
KA7536
KA7539
KA7542
KA7545
VCC
3
OUT
TO-92
-30~ + 75
VREF
2
GND
Rev. B
©1999 Fairchild Semiconductor Corporation
KA75XXX
VOLTAGE DETECTOR
ABSOLUTE MAXIMUM RATING (TA = 25
)
Characteristic
Symbol
Value
Unit
Supply Voltage
VCC
0.3 ~ +15.0
2.5/2.7/2.9/3.1
3.3/3.6/3.9/4.2/4.5
50
V
Detecting Voltage
VDET
V
Hysteresis Voltage
VHYS
TOPR
TSTG
PD
mV
Operating Temperature
Storage Temperature
- 30 ~ + 75
- 50 ~ + 150
200
Power Dissipation
Mw
/
Detecting Voltage Temperature Coefficient
VDET
/
T
RL = 200
,
0.01
ELECTRICAL CHARACTERISTICS (TA = 25
)
Characteristic
Detecting Voltage
Symbol
Test Conditions
RL = 200
Min
2.35
Typ
2.5
Max
Unit
VDET
2.65
V
KA75250
KA75270
KA75290
KA75310
KA7533
KA7536
KA7539
KA7542
KA7545
2.55
2.75
2.95
3.15
3.45
3.75
4.05
4.35
2.7
2.9
3.1
3.3
3.6
3.9
4.2
4.5
2.85
3.05
3.25
3.45
3.75
4.05
4.35
4.65
VOL 0.4V
Low Output Voltage
Output Leakage Current
Hysteresis Voltage
VOL
ILKG
0.4
0.1
V
A
RL = 200
VCC = 15V
RL = 200
VHYS
30
50
100 mV
Detecting Voltage Temperature
Coefficient
VDET
/
T
RL = 200
0.01
/
Circuit Current (at on time)
Circuit Current (at off time)
Threshold Operating Voltage
“L” Transmission Delay Time
“H” Transmission Delay Time
Output Current (at on time I)
ICCL
ICCH
VTH(OPR)
tOL
VCC = VDET(MIN) - 0.05V
VCC = 5.25V
300
30
500
50
A
A
0.6
0.8
10
1.0
V
RL = 200 , VOL 0.4V
RL = 1.0K , CL = 100pF
RL = 1.0K , CL = 100pF
S
S
tOH
15
20
IOLI
7
8
17
27 mA
VCC = VDET(MIN) - 0.05V, TC = 25
VCC = VDET(MIN) - 0.05V,
TC = -30 ~ + 75
Output Current (at on time II)
IOLII
16
30 mA
KA75XXX
VOLTAGE DETECTOR
TEST CIRCUIT 1.
A1
A2
1
RL
V1
KA75XX
2
3
10u
10V
M
TEST CIRCUIT 2.
1
RL
0.3u/
100V
5.0V
KA75XX
2
3
INPUT
PULSE
10u/
100V
M
TEST CIRCUIT 3.
VCC
1
RL
KA75XX
2
3
LED
KA75XXX
VOLTAGE DETECTOR
APPLICATION CIRCUIT
VCC
1
VCC
CPU
GND
RESET
KA75XX
3
2
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is
not intended to be an exhaustive list of all such trademarks.
ACEx™
CoolFET™
ISOPLANAR™
MICROWIRE™
POP™
PowerTrench™
QS™
UHC™
VCX™
CROSSVOLT™
E2CMOSTM
FACT™
FACT Quiet Series™
Quiet Series™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
TinyLogic™
FAST®
FASTr™
GTO™
HiSeC™
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER
NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD
DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT
OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT
RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant into
the body, or (b) support or sustain life, or (c) whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling, can be
reasonably expected to result in significant injury to the
user.
2. A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Formative or
In Design
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
Preliminary
First Production
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
No Identification Needed
Obsolete
Full Production
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
Not In Production
This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
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