TC54VC4901EMBSTP [TELCOM]

VOLTAGE DETECTOR; 电压检测器


型号：	TC54VC4901EMBSTP
厂家：	TELCOM SEMICONDUCTOR, INC
描述：	VOLTAGE DETECTOR 电压检测器
文件：	总3页 (文件大小：53K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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 (V_OUT) remains in the

logic HIGH state as long as V_INis greater than the

specified threshold voltage (V_D^–_ET). When V_INfalls below

V^–_DET, the output is driven to a logic LOW. V_OUTremains

LOW until V_INrises above V^–_DETby an amount V_HYST

whereupon it resets to a logic HIGH.

PIN CONFIGURATIONS

*SOT-23A-3

SOT-89-3

TO-92

ORDERING INFORMATION

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

OUT

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

TC54VC only

Package Type and Pin Count:

CB: SOT-23A-3*, MB: SOT-89-3, ZB: TO-92-3

Taping Direction:

Standard Taping

Reverse Taping

OUT

–

No suffix: TO-92 Bulk

*SOT-23A-3 is equivalent to EIAJ (SC-59).

REF

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 (V_IN)..................................................................... 12V

Output Voltage: CMOS ............ (V_SS– 0.3) to (V_IN+ 0.3)

Open Drain ................. (V_SS– 0.3) to 12V

Output Current .........................................................50mA

Power Dissipation: (T_A≤ 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: T_A= 25°C, unless otherwise specified.

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

V_IN

I_SS

Operating Voltage

Quiescent Current

V^–_DET= 2.1 to 6.0V

1.5

10.0

V_IN

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

V_D^–_ET

V_HYST

I_OUT

Threshold Voltage

Hysteresis Range

Output Current

(V^–_DET

x 0.98

(V^–_DET

x 0.02

)

(V^–_DET

)

x 0.05 x 0.08

Nch V_DS= 0.5

V_IN= 2.1V

3.0V

7.7

10.1

11.5

13.0

4.0V

5.0V

Pch V_DS= 2.1V

V_IN= 8.0V

– 10.0

T_C(V_D^–_ET

)

Tempco of (V_D^–_ET

)

– 40°C ≤ T_A≤ 85°C

± 100

ppm/°C

PIN DESCRIPTION

Pin No.

Symbol

Description

V_IN

Analog input. This pin is both the power supply input and the voltage to be monitored.

V_OUT

Digital output. This output goes low when V_INdrops below V_D^–_ETand returns

high when V_INrises above V^–_DET+ V_HYST. (See timing chart).

V_SS

Ground terminal.

4-280

TELCOM SEMICONDUCTOR, INC.

VOLTAGEDETECTOR

TC54

TIMING CHART

DESCRIPTION OF OPERATION

Refer to the Timing Chart below. In normal steady-state

operation, when V_IN> V_D^–_ET, the output will be at a logic high.

In the case of the TC54V, this is an open-drain condition. If

DET

RELEASE

VOLTAGE

RESET

VOLTAGE

–

,theoutputwillpulldown

andwhentheinputfallsbelowV_DET

HYST

–

DETECT VOLTAGE

DET

(Logic 0) to V_SS. Generally, V_OUTcan pull down to within

0.5V of V_SSat rated output current and input voltage. (See

the Electrical Characteristics section).

The output, V_OUT, will stay valid until the input voltage

falls below the Minimum Operating Voltage, V_IN(MIN), of

1.5V. Below this minimum operating voltage, the output is

undefined. During power-up or anytime V_INhas fallen below

V_IN(MIN), V_OUTwill remain undefined until V_INrises above

MINIMUM OPERATING

VOLTAGE

GROUND LEVEL

OUTPUT VOLTAGE

GROUND LEVEL

V_IN(MIN), at which time the output will become valid. V_OUT

will be in its active low state while V_IN(MIN) < V_IN

V_DET

–

(

+ V_HYST). If and when the input rises above

, the output will assume its inactive state. (High for

V_DETV_DET

V_DET

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

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

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

ቩ = detecting accuracy

1 = ± 1.0% (custom), 2 = ± 2.0% (standard)

ቪ, ቫ, ቭ & ቮ = assembly lot number

TELCOM SEMICONDUCTOR, INC.

4-281

相关型号：