SN74AHC123A Status: ACTIVE

Dual Retriggerable Monostable Multivibrators

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Datasheet

SN54AHC123A, SN74AHC123A (Rev. H) (sn74ahc123a.pdf, 881 KB)
21 Oct 2005 Download

	SN54AHC123A	SN74AHC123A
Voltage Nodes(V)	5, 3.3	5, 3.3
Vcc range(V)	2 to 5.5	2 to 5.5
Rating	Military	Catalog
Technology Family	AHC	AHC
	Samples	Samples
	Inventory	Inventory

Other qualified versions of SN74AHC123A

Version	Part Number	Definition
Enhanced Product	SN74AHC123A-EP	Supports Defense, Aerospace and Medical Applications
Military	SN54AHC123A	QML certified for Military and Defense Applications

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Product Information

Features

Operating Range 2-V to 5.5-V V_CC
Schmitt-Trigger Circuitry On A\, B, and CLR\ Inputs for Slow Input Transition Rates
Edge Triggered From Active-High or Active-Low Gated Logic Inputs
Retriggerable for Very Long Output Pulses
Overriding Clear Terminates Output Pulse
Glitch-Free Power-Up Reset On Outputs
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

Description

The ’AHC123A devices are dual retriggerable monostable multivibrators designed for 2-V to 5.5-V V_CC operation.

These edge-triggered multivibrators feature output pulse-duration control by three methods. In the first method, the A\ input is low, and the B input goes high. In the second method, the B input is high, and the A\ input goes low. In the third method, the A\ input is low, the B input is high, and the clear (CLR)\ input goes high.

The output pulse duration is programmed by selecting external resistance and capacitance values. The external timing capacitor must be connected between C_ext and R_ext/C_ext (positive) and an external resistor connected between R_ext/C_ext and V_CC. To obtain variable pulse durations, connect an external variable resistance between R_ext/C_ext and V_CC. The output pulse duration also can be reduced by taking CLR\ low.

Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input pulse. The A\, B, and CLR\ inputs have Schmitt triggers with sufficient hysteresis to handle slow input transition rates with jitter-free triggering at the outputs.

Once triggered, the basic pulse duration can be extended by retriggering the gated low-level-active (A\) or high-level-active (B) input. Pulse duration can be reduced by taking CLR\ low. CLR\ input can be used to override A\ or B inputs. The input/output timing diagram illustrates pulse control by retriggering the inputs and early clearing.

The variance in output pulse duration from device to device typically is less than ±0.5% for given external timing components. An example of this distribution for the ’AHC123A is shown in Figure 10. Variations in output pulse duration versus supply voltage and temperature are shown in Figure 6.

During power up, Q outputs are in the low state, and Q\ outputs are in the high state. The outputs are glitch free, without applying a reset pulse.

For additional application information on multivibrators, see the application report Designing With the SN74AHC123A and SN74AHCT123A, literature number SCLA014.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools	Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Footprints	Samples
SN74AHC123AD	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74AHC123ADBR	ACTIVE	-40 to 85	0.24 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123ADBRE4	ACTIVE	-40 to 85	0.24 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123ADBRG4	ACTIVE	-40 to 85	0.24 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123ADE4	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74AHC123ADG4	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74AHC123ADGVR	ACTIVE	-40 to 85	0.26 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123ADGVRE4	ACTIVE	-40 to 85	0.26 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123ADGVRG4	ACTIVE	-40 to 85	0.26 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123ADR	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123ADRE4	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123ADRG4	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123AN	ACTIVE	-40 to 85	0.22 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE	Purchase Samples
SN74AHC123ANE4	ACTIVE	-40 to 85	0.22 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE	Purchase Samples
SN74AHC123APWR	ACTIVE	-40 to 85	0.22 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123APWRE4	ACTIVE	-40 to 85	0.22 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123APWRG4	ACTIVE	-40 to 85	0.22 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

	TI Inventory Status				Reported Distributor Inventory
SN74AHC123AD	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	3880*	>10k \| 28 Oct	4 Weeks		Americas	Avnet	620
						Mouser Electronics	>1k
						Rochester Electronics	368
					Asia	WPI	470
					Europe	Avnet-SILICA	80
					Europe	EBV Elektronik	>1k
SN74AHC123ADBR	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	2000*	>10k \| 28 Oct	5 Weeks		Americas	DigiKey	>1k
						Mouser Electronics	>1k
						Rochester Electronics	>1k
SN74AHC123ADBRE4	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	2000*	>10k \| 28 Oct	5 Weeks		None Reported View Distributors
SN74AHC123ADBRG4	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	2000*	>10k \| 28 Oct	5 Weeks		None Reported View Distributors
SN74AHC123ADE4	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	3880*	>10k \| 28 Oct	4 Weeks		None Reported View Distributors
SN74AHC123ADG4	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	3880*	>10k \| 28 Oct	4 Weeks		None Reported View Distributors
SN74AHC123ADGVR	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	0*	8000 \| 28 Oct	7 Weeks		Americas	DigiKey	>1k
	0*	>10k \| 1 Dec	7 Weeks		Americas	Rochester Electronics	>1k
SN74AHC123ADGVRE4	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	0*	8000 \| 28 Oct	7 Weeks		None Reported View Distributors
	0*	>10k \| 1 Dec	7 Weeks
SN74AHC123ADGVRG4	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	0*	8000 \| 28 Oct	7 Weeks		None Reported View Distributors
	0*	>10k \| 1 Dec	7 Weeks
SN74AHC123ADR	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	0*	1727 \| 28 Oct	4 Weeks		Americas	DigiKey	>1k
		>10k \| 29 Oct				Mouser Electronics	>1k
						Rochester Electronics	>1k
					Asia	WPI	>1k
SN74AHC123ADRE4	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	0*	1727 \| 28 Oct	4 Weeks		None Reported View Distributors
	0*	>10k \| 29 Oct	4 Weeks
SN74AHC123ADRG4	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	0*	1727 \| 28 Oct	4 Weeks		None Reported View Distributors
	0*	>10k \| 29 Oct	4 Weeks
SN74AHC123AN	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	0*	>10k \| 19 Nov	5 Weeks		Americas	Rochester Electronics	>1k
SN74AHC123ANE4	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	0*	>10k \| 19 Nov	5 Weeks		None Reported View Distributors
SN74AHC123APWR	As of 8:44 AM GMT, 15 Oct 2008				As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time		Region	Company	In Stock	Purchase
	0*	>10k \| 7 Nov	4 Weeks		Americas	Avnet	>1k
						DigiKey	>1k
						Mouser Electronics	>1k
					Asia	WPI	>1k
				Europe	Arrow Northern Europe	>1k
					Avnet-SILICA	>1k
					EBV Elektronik	>1k
SN74AHC123APWRE4	As of 8:44 AM GMT, 15 Oct 2008			As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 7 Nov	4 Weeks	Americas	Mouser Electronics	>1k
SN74AHC123APWRG4	As of 8:44 AM GMT, 15 Oct 2008			As of 8:44 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 7 Nov	4 Weeks	None Reported View Distributors
View all Distributors

* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
SN74AHC123AD	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADBRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADGVRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123ADRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123AN	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
SN74AHC123ANE4	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
SN74AHC123APWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123APWRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123APWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Datasheets

SN54AHC123A, SN74AHC123A (Rev. H) (sn74ahc123a.pdf, 881 KB)
21 Oct 2005 Download

Application Notes

Selecting the Right Level Translation Solution (Rev. A) (scea035a.htm, 8 KB)
22 Jun 2004 Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (szza046.htm, 8 KB)
24 May 2004 Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (szza036b.htm, 8 KB)
28 May 2003 Abstract
Advanced High-Speed CMOS (AHC) Logic Family (Rev. C) (scaa034c.htm, 9 KB)
02 Dec 2002 Abstract
Texas Instruments Little Logic Application Report (scea029.htm, 8 KB)
01 Nov 2002 Abstract
TI IBIS File Creation, Validation, and Distribution Processes (szza034.htm, 9 KB)
29 Aug 2002 Abstract
Designing With the SN74AHC123A and SN74AHCT123A (scla014.htm, 8 KB)
01 Oct 1999 Abstract
Benefits & Issues of Migrating 5-V and 3.3-V Logic to Lower-Voltage Supplies (Rev. A) (sdaa011a.htm, 9 KB)
08 Sep 1999 Abstract
Implications of Slow or Floating CMOS Inputs (Rev. C) (scba004c.htm, 8 KB)
01 Feb 1998 Abstract
Migration From 3.3-V To 2.5-V Power Supplies For Logic Devices (scea005.htm, 9 KB)
01 Dec 1997 Abstract
Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A) (scba012a.htm, 8 KB)
01 Aug 1997 Abstract
CMOS Power Consumption and CPD Calculation (Rev. B) (scaa035b.htm, 9 KB)
01 Jun 1997 Abstract
Live Insertion (sdya012.htm, 8 KB)
01 Oct 1996 Abstract

View Application Notes for Monostable Multivibrators

User Guides

LOGIC Pocket Data Book (Rev. B) (scyd013b.pdf, 6001 KB)
16 Jan 2007 Download

More Literature

Logic Selection Guide 2007 (Rev. Z) (sdyu001z.pdf, 2862 KB)
24 Apr 2007 Download
Design Summary for WCSP Little Logic (Rev. B) (scet007b.pdf, 295 KB)
04 Nov 2004 Download
Military Semiconductors Selection Guide 2004-2005 (Rev. D) (sgyc003d.pdf, 964 KB)
10 Aug 2004 Download
Logic Cross-Reference (Rev. A) (scyb017a.pdf, 2938 KB)
07 Oct 2003 Download
AHC/AHCT Designer's Guide February 2000 (Rev. D) (scla013d.htm, 8 KB)
24 Feb 2000 Abstract
Military Advanced High-Speed CMOS Logic (AHC/AHCT) (sgyn133.pdf, 85 KB)
01 Apr 1998 Download
Military Advanced High-Speed CMOS Logic (AHC/AHCT) (Rev. C) (sgyv014c.pdf, 30 KB)
01 Apr 1998 Download

Reference Designs

Description	Part #	Company
Industrial Control via the CAN Bus Demonstration Platform	CANBUS-DEMO	Texas Instruments

Complementary Products - Can be used with SN74AHC123A
Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
SN74LVC244A	Octal Buffer/Driver With 3-State Outputs	BUFFERS, DRIVERS AND TRANSCEIVERS-NON-INVERTING BUFFERS AND DRIVERS	TI customers also evaluated this product.
SN74LVC245A	Octal Bus Transceiver With 3-State Outputs	BUFFERS, DRIVERS AND TRANSCEIVERS-STANDARD TRANSCEIVERS	TI customers also evaluated this product.

SN74AHC123A Status: ACTIVE

Dual Retriggerable Monostable Multivibrators

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