TC1271ALVRCTR View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC1271ALVRCTR

Voltage Supervisor with Manual Reset Input

Microchip Technology 

TC1270A/70AN/71A

1.1.2 TIMING DIAGRAMS AND SPECIFICATIONS

FIGURE 1-2:

MR

MR PIN AND RESET PIN WAVEFORM

tMR

RST

tMRNI

tRST

tMD

RST

FIGURE 1-3:

DEVICE VOLTAGE AND RESET PIN (ACTIVE LOW) WAVEFORM

VTRIP

VTRIP(MAX)

VTRIP(MIN)

VDD

1V

tRST

tRD

tRST

RST(1)

RST

VDD < 1V is outside the device operating specification. The RST (or RST) output state is unknown while VDD < 1V.

Note 1: The TC1270AN requires an external pull-up resistor.

TABLE 1-1: RESET AND DEVICE RESET TIMER REQUIREMENTS

Electrical Characteristics: Unless otherwise noted, VDD = 5V for L/M versions, VDD = 3.3V for T/S versions,

VDD = 3V for R version, TA = -40°C to +125°C. Typical values are at TA = +25°C.

Parameter

Sym

Min Typ(1) Max Units

Test Conditions

VDD to Reset Delay

Reset Active

Timeout

Period

TC127XAxBVyy (3)

TC127XAxCVyy (3)

TC127XAxVyy (3)

tRD

tRST

—

50

—

1.09 2.19 4.38

17.5

35

70

140

280

560

µs VDD = VTRIP(MAX) to

VTRIP(MIN) –125 mV

ms VDD = VTRIP(MAX)

ms VDD = VTRIP(MAX)

ms VDD = VTRIP(MAX)

MR Minimum Pulse Width

tMR

10

—

—

µs

MR Noise Immunity

tMRNI

—

0.1

—

µs

MR to Reset Propagation Delay

tMD

—

0.2

—

µs

Note 1: Unless otherwise stated, data in the Typical (“Typ”) column is at 5V, +25°C.

2: RST output for TC1270A, RST output for TC1271A.

3: TC127XA refers to either the TC1270A, TC1270AN or TC1271A device. “x” indicated the selected Voltage

Trip Point, while “yy” indicates the package code.

© 2007 Microchip Technology Inc.

DS22035B-page 5

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