74LVC1G123DC数据手册集成电路（IC）的多谐振荡器规格书PDF

描述 Description

The 74LVC1G123 is a single retriggerable monostable multivibrator with Schmitt trigger inputs. Output pulse width is controlled by three methods:
The basic pulse is programmed by selection of an external resistor (REXT) and capacitor (CEXT).Once triggered, the basic output pulse width may be extended by retriggering the gated active LOW-going edge input (A) or the active HIGH-going edge input (B). By repeating this process, the output pulse period (Q = HIGH) 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.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.

特性 Features

• Wide supply voltage range from 1.65 V to 5.5 V
• High noise immunity
• ±24 mA output drive (VCC = 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 JESD22-A114F exceeds 2000 V
• MM JESD22-A115-A exceeds 200 V
• CDM JESD22-C101E exceeds 1000 V

• Multiple package options
• Specified from -40 °C to +85 °C and -40 °C to +125 °C