Nexperia 74LVC1G123DP,125

The 74LVC1G123 is a single retriggerable monostable multivibrator with Schmitt trigger inputs. Output pulse width is controlled by three methods:

1. The basic pulse is programmed by selection of an external resistor (R_EXT) and capacitor (C_EXT).
2. Once triggered, the basic output pulse width may be extended by retriggering the gated active LOW - going edge input (A(overline)) or the active HIGH - going edge input (B). By repeating this process, the output pulse period can be made as long as desired. Alternatively an output delay can be terminated at any time by a LOW - going edge on input CLR, which also inhibits the triggering.
3. An internal connection from CLR to the input gates makes it possible to trigger the circuit by a HIGH - going signal at input CLR.

Inputs can be driven from either 3.3 V or 5 V devices. This feature allows the use of these devices as translators in a mixed 3.3 V and 5 V environment. Schmitt trigger inputs, makes the circuit highly tolerant to slower input rise and fall times.

This device is fully specified for partial power - down applications using IOFF. The IOFF circuitry disables the output, preventing the damaging backflow current through the device when it is powered down.

• Wide supply voltage range from 1.65 V to 5.5 V
• High noise immunity
• ±24 mA output drive (V_CC = 3.0 V)
• CMOS low power consumption
• DC triggered from active HIGH or active LOW inputs
• Retriggerable for very long pulses up to 100 % duty factor
• Direct reset terminates output pulse
• Schmitt trigger on all inputs
• Complies with JEDEC standard: JESD8 - 7 (1.65 V to 1.95 V) JESD8 - 5 (2.3 V to 2.7 V) JESD8 - B/JESD36 (2.7 V to 3.6 V)
• Power - on - reset on outputs
• Latch - up performance exceeds 100 mA
• Direct interface with TTL levels
• Inputs accept voltages up to 5.5 V
• ESD protection: HBM: ANSI/ESDA/JEDEC JS - 001 class 2 exceeds 2000 V CDM: ANSI/ESDA/JEDEC JS - 002 class C3 exceeds 1000 V
• Multiple package options
• Specified from - 40 ℃ to +85 ℃ and - 40 ℃ to +125 ℃