74LV123

Dual retriggerable monostable multivibrator with reset

应用领域

The 74LV123 is a dual retriggerable monostable multivibrator with reset. The basic output pulse width is programmed by selection of external components (REXT and CEXT). Once triggered this basic pulse width may be extended by retriggering either of the edge triggered inputs (nA or (nB). By repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made as long as desired. Alternatively, an output delay can be terminated at any time by a LOW-going edge on input nRD. Control inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess VCC. Schmitt-trigger action at nA and nB inputs makes the circuit tolerant of slower input rise and fall times.

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产品详情

特性

Wide supply voltage range from 1.0 V to 5.5 V
CMOS low power dissipation
Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
Optimized for low-voltage applications: 1.0 V to 3.6 V
Accepts TTL input levels between VCC = 2.7 V and VCC = 3.6 V
Typical output ground bounce: < 0.8 V at VCC = 3.3 V and Tamb = 25 °C
Typical HIGH-level output voltage (VOH) undershoot: > 2 V at VCC = 3.3 V and Tamb = 25 °C
DC triggered from active HIGH or active LOW inputs
Retriggerable for very long pulses up to 100 % duty factor
Direct reset terminates output pulses
Schmitt-trigger action on all inputs except for the reset input
Complies with JEDEC standards:

JESD8-7 (1.65 V to 1.95 V)
JESD8-5 (2.3 V to 2.7 V)
JESD8C (2.7 V to 3.6 V)
JESD36 (4.5 V to 5.5 V)

ESD protection:

HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V

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

参数类型

Type number	Product status	VCC (V)	Logic switching levels	Output drive capability (mA)	tpd (ns)	Power dissipation considerations	Tamb (°C)	Rth(j-a) (K/W)	Ψth(j-top) (K/W)	Rth(j-c) (K/W)	Package name
74LV123BQ	Production	1.0 - 5.5	TTL	± 12	20	low	-40~125	86	9.0	54	DHVQFN16
74LV123D	Production	1.0 - 5.5	TTL	± 12	20	low	-40~125	84	6.1	43.3	SO16
74LV123PW	Production	1.0 - 5.5	TTL	± 12	20	low	-40~125	118	3.0	47.1	TSSOP16

多谐振荡器

74LV123

应用领域

特性

参数类型