概述
数据手册TC54VN5502EMB 概述
VOLTAGE DETECTOR 电压检测器
TC54VN5502EMB 数据手册
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TC54
VOLTAGE DETECTOR
FEATURES
GENERAL DESCRIPTION
■ Precise Detection Thresholds .... Standard ± 2.0%
Custom ± 1.0%
■ Small Packages ........... SOT-23A-3, SOT-89, TO-92
■ Low Current Drain ..................................... Typ. 1µA
■ Wide Detection Range..........................2.1V to 6.0V
■ Wide Operating Voltage Range ............ 1.5V to 10V
The TC54 Series are CMOS voltage detectors, suited
especially for battery-powered applications because of their
extremely low 1µA operating current and small surface-
mount packaging. Each part is laser trimmed to the desired
threshold voltage which can be specified from 2.1V to 6.0V,
in 0.1V steps.
The device includes a comparator, low-current high-
precisionreference,laser-trimmeddivider,hysteresiscircuit
andoutputdriver. TheTC54isavailablewitheitheranopen-
drain or complementary output stage.
APPLICATIONS
■ Battery Voltage Monitoring
■ Microprocessor Reset
■ System Brownout Protection
■ Switching Circuit in Battery Backup
■ Level Discriminator
In operation, the TC54's output (VOUT) remains in the
logic HIGH state as long as VIN is greater than the
specified threshold voltage (VD–ET). When VIN falls below
V–DET, the output is driven to a logic LOW. VOUT remains
LOW until VIN rises above V–DET by an amount VHYST
whereupon it resets to a logic HIGH.
,
PIN CONFIGURATIONS
*SOT-23A-3
SOT-89-3
TO-92
V
IN
ORDERING INFORMATION
2
1 2 3
PART CODE TC54 V X XX X X X XX XXX
TC54
Output form:
TC54
N = Nch Open Drain
C = CMOS Output
TC54
3
1
1
2
3
V
V
SS
V
V
V
SS
OUT
OUT
IN
Detected Voltage:
Ex: 21 = 2.1V; 60 = 6.0V
Extra Feature Code: Fixed: 0
*SOT-23A-3 is equivalent to EIAJ (SC-59)
Tolerance:
1 = ± 1.0% (custom)
2 = ± 2.0% (standard)
FUNCTIONAL BLOCK DIAGRAM
Temperature: E: – 40°C to + 85°C
2
TC54VC only
Package Type and Pin Count:
V
IN
CB: SOT-23A-3*, MB: SOT-89-3, ZB: TO-92-3
Taping Direction:
Standard Taping
Reverse Taping
V
OUT
–
+
1
No suffix: TO-92 Bulk
*SOT-23A-3 is equivalent to EIAJ (SC-59).
V
REF
V
SS
3
TC54VN has open-drain output.
TC54VC has complementary output.
TC54-10 11/8/96
TELCOM SEMICONDUCTOR, INC.
4-279
VOLTAGEDETECTOR
TC54
* Static-sensitive device. Unused devices must be stored in conductive
material. Protect devices from static discharge and static fields. Stresses
above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. These are stress ratings only and functional
operation of the device at these or any other conditions above those
indicated in the operational sections of the specifications is not implied.
Exposure to Absolute Maximum Rating Conditions for extended periods
may affect device reliability.
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage (VIN) ..................................................................... 12V
Output Voltage: CMOS ............ (VSS – 0.3) to (VIN + 0.3)
Open Drain ................. (VSS – 0.3) to 12V
Output Current .........................................................50mA
Power Dissipation: (TA ≤ 70°C)
SOT-23A-3 .....................................................240mW
SOT-89-3 .......................................................400mW
TO-92
.......................................................440mW
Operating Temperature .......................... – 40°C to + 85°C
Storage Temperature ........................... – 65°C to + 150°C
Soldering Temperature ...................... 300°C, 10 seconds
ELECTRICAL CHARACTERISTICS: TA = 25°C, unless otherwise specified.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
VIN
ISS
Operating Voltage
Quiescent Current
V–DET = 2.1 to 6.0V
1.5
10.0
V
VIN
=
2.1V
3.0V
4.0V
5.0V
1.0
1.3
1.6
2.0
3.0
3.4
3.8
4.2
(V–DET
x 1.02
(V–DET
µA
VD–ET
VHYST
IOUT
Threshold Voltage
Hysteresis Range
Output Current
(V–DET
x 0.98
(V–DET
x 0.02
)
)
V
)
(V–DET
)
)
V
x 0.05 x 0.08
Nch VDS = 0.5
VIN = 2.1V
3.0V
7.7
mA
10.1
11.5
13.0
4.0V
5.0V
Pch VDS = 2.1V
VIN = 8.0V
– 10.0
TC (VD–ET
)
Tempco of (VD–ET
)
– 40°C ≤ TA ≤ 85°C
± 100
ppm/°C
PIN DESCRIPTION
Pin No.
Symbol
Description
1
2
VIN
Analog input. This pin is both the power supply input and the voltage to be monitored.
VOUT
Digital output. This output goes low when VIN drops below VD–ET and returns
high when VIN rises above V–DET + VHYST. (See timing chart).
3
VSS
Ground terminal.
4-280
TELCOM SEMICONDUCTOR, INC.
VOLTAGEDETECTOR
4
TC54
TIMING CHART
DESCRIPTION OF OPERATION
Refer to the Timing Chart below. In normal steady-state
operation, when VIN > VD–ET, the output will be at a logic high.
In the case of the TC54V, this is an open-drain condition. If
+
V
IN
V
DET
RELEASE
VOLTAGE
RESET
VOLTAGE
OR
–
,theoutputwillpulldown
andwhentheinputfallsbelowVDET
V
HYST
–
DETECT VOLTAGE
V
DET
(Logic 0) to VSS. Generally, VOUT can pull down to within
0.5V of VSS at rated output current and input voltage. (See
the Electrical Characteristics section).
The output, VOUT, will stay valid until the input voltage
falls below the Minimum Operating Voltage, VIN(MIN), of
1.5V. Below this minimum operating voltage, the output is
undefined. During power-up or anytime VIN has fallen below
VIN (MIN), VOUT will remain undefined until VIN rises above
MINIMUM OPERATING
VOLTAGE
GROUND LEVEL
OUTPUT VOLTAGE
GROUND LEVEL
VIN(MIN), at which time the output will become valid. VOUT
+
will be in its active low state while VIN(MIN) < VIN
<
.
VDET
+
–
(
=
+ VHYST). If and when the input rises above
, the output will assume its inactive state. (High for
VDET VDET
+
VDET
TC54VC, open-drain for TC54VN).
APPLICATIONS
Refer to TelCom Semiconductor Application Note #2,
Using the TC54 Voltage Detector.
MARKING
SOT-23A-3
TO-92
SOT-89-3
1
5
2
6
3
7
4
8
9 10 11 12
ቢ = output (Nch or CMOS) plus first voltage digit
ቢ, ባ & ቤ = 54_ (fixed)
2 3 4 5 6
ብ = output (C = CMOS, N = Nch)
ቦ = first voltage digit (2-6)
Nch
CMOS
M N P R S
C D E F H
D
ex: CMOS 3.x = kkkk
ባ = first voltage decimal (0-9)
ex: CMOS 3.4 = kkkk
ቤ & ብ = assembly lot number
ቧ = first voltage decimal (0-9)
ቨ = extra feature code : fixed : 0
D
4
ቩ = detecting accuracy
1 = ± 1.0% (custom), 2 = ± 2.0% (standard)
ቪ, ቫ, ቭ & ቮ = assembly lot number
TELCOM SEMICONDUCTOR, INC.
4-281
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