1 Features

• RC configurable from 59.4μs to 9011s (VCC =

3.3V)

• For longer pulse widths, TI recommends

TPUL2T323

• 10% maximum pulse width variation

• Wide operating range from 1.5V to 5.5V

• Inputs accept voltages up to 5.5V

• Schmitt-trigger architecture on all inputs

• Single-supply voltage translator (refer to Reduced

Input Threshold Voltage):

– Up translation:

• 1.2V to 1.8V

• 1.5V to 2.5V

• 1.8V to 3.3V

• 3.3V to 5.0V

– Down translation:

• 5.0V, 3.3V, 2.5V to 1.8V

• 5.0V, 3.3V to 2.5V

• 5.0V to 3.3V

2 Applications

• Demodulate a digital Amplitude Shift Keying (ASK)

signal

• Reset a system for a fixed period of time

• Generate a positive fixed-width digital pulse

• Detect a digital signal rising edge

• Detect a digital signal falling edge

• Debounce a switch

3 Description

The TPUL2T122x devices contain two independent

RC configurable retriggerable monostable

multivibrators designed for operation from 1.5V to

5.5V. The output pulse duration is configured by

selecting external resistance and capacitance values

with an approximate output pulse width of two ≅ R × C.

The TPUL2T122x devices feature two trigger inputs,

allowing for rising edge (T) and falling edge (T)

triggers. Each channel also includes a clear input

(CLR) that can be used asynchronously to stop an

active output pulse. All inputs include Schmitt-trigger

architecture to allow for slow input transition rates and

improve noise immunity.