Datasheet NXP 74LVC1G123DC,125 — 数据表

74LVC1G123
Single retriggerable monostable multivibrator; Schmitt trigger inputs
Rev. 4 -27 November 2013 Product data sheet 1. General description
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 (REXT) and capacitor (CEXT). 2. 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. 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. 2. Features and benefits 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 NXP Semiconductors 74LVC1G123
Single retriggerable monostable multivibrator; Schmitt trigger inputs 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 3. Ordering information
Table 1. Ordering information Package Temperature range Name 74LVC1G123DP 74LVC1G123DC 74LVC1G123GT 74LVC1G123GF 74LVC1G123GD 74LVC1G123GN 74LVC1G123GS 40 C to +125 C 40 C to +125 C 40 C to +125 C 40 C to +125 C 40 C to +125 C 40 C to +125 C 40 C to +125 C Description Version SOT505-2 SOT765-1 SOT833-1 SOT1089 SOT996-2 SOT1116 SOT1203 TSSOP8 plastic thi …