74LV123DB

Dual retriggerable monostable multivibrator with reset

NRND

The 74LV123 is a dual retriggerable monostable multivibrator with reset. The basic output pulse width is programmed by selection of external components (R_EXT and C_EXT). 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 V_CC. Schmitt-trigger action at nA and nB inputs makes the circuit tolerant of slower input rise and fall times.

Not recommended for new designs (NRND).

Alternatives

74LV123PW

Recommended replacement

Dual retriggerable monostable multivibrator with reset

Buy from Nexperia

SKU	Stock*	MOQ	Price per unit**	Quantity

Buy from distributors

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

* Stock values are subject to change
** Displayed price per unit is based on small quantity orders
*** Authorized resellers for overstock, mature, and discontinued products which are warranted for reliability by the reseller, no longer by Nexperia

Features and benefits

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 V_CC = 2.7 V and V_CC = 3.6 V
Typical output ground bounce: < 0.8 V at V_CC = 3.3 V and T_amb = 25 °C
Typical HIGH-level output voltage (V_OH) undershoot: > 2 V at V_CC = 3.3 V and T_amb = 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

Applications

Parametrics

Type number	Product status	Package name
74LV123DB NRND	End of life	SSOP16

Package

All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type number	Orderable part number, (Ordering code (12NC))	Status	Marking	Package	Package information	Reflow-/Wave soldering	Packing
74LV123DB NRND	74LV123DB,118 ( 9352 102 60118 )	Discontinued / End-of-life	LV123	SSOP16 (SOT338-1)	SOT338-1	SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1

Discontinuation information

Type number	Orderable part number	Ordering code	Last time buy date	Last time delivery date	Replacement product	Status	Comments
74LV123DB NRND	74LV123DB,118	935210260118	2021-12-31	2022-06-30	74LV123PW	Version withdrawal

Quality, reliability & chemical content

All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type number	Orderable part number	Chemical content	RoHS / RHF	Leadfree conversion date	MSL	MSL leadfree
74LV123DB NRND	74LV123DB,118	74LV123DB		week 12, 2005	1	1

Quality and reliability disclaimer

Series

74LV123 - Dual retriggerable monostable multivibrator with reset

Documentation (4)

File name	Title	Type	Date
74LV123	Dual retriggerable monostable multivibrator with reset	Data sheet	2021-09-22
lv	lv Spice model	SPICE model	2013-05-06
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SSOP-TSSOP-VSO-REFLOW	Footprint for reflow soldering	Reflow soldering	2009-10-08

Support

If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.

Models

File name	Title	Type	Date
lv	lv Spice model	SPICE model	2013-05-06