SN74AHC123A-EP Status: ACTIVE

Enhanced Product Dual Retriggerable Monostable Multivibrator

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Datasheet

SN74AHC123A-EP (Rev. A) (PDF 538 KB)
14 Mar 2007

	SN74AHC123A-EP
Voltage Nodes(V)	5, 3.3
Vcc range(V)	2 tp 5.5
Rating	HiRel Enhanced Product
Technology Family	AHC
	Samples
	Inventory

Other qualified versions of SN74AHC123A-EP

Version	Part Number	Definition
Catalog	SN74AHC123A	TI's standard catalog product

Customers Who Evaluated This Product Also Evaluated

SN74LVC1G123: Single Retriggerable Monostable Multivibrator with Schmitt-Trigger Inputs

Product Information

Features

Controlled Baseline
- One Assembly Site
- One Test Site
- One Fabrication Site
Extended Temperature Performance of -55°C to 125°C
Enhanced Diminishing Manufacturing Sources (DMS) Support
Enhanced Product-Change Notification
Qualification Pedigree⁽¹⁾
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 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)

⁽¹⁾ Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.

DESCRIPTION/ORDERING INFORMATION

The SN74AHC123A device is a dual retriggerable monostable multivibrator designed for 2-V to 5.5-V V_CC operation.

This edge-triggered multivibrator features 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 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 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 is less than ±0.5% (typ) for given external timing components.

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)	DSCC #	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Footprints	Samples
SN74AHC123AMDREP	ACTIVE	-55 to 125	V62/06665-01XE	0.73 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74AHC123AMDREPG4	ACTIVE	-55 to 125		0.73 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R		Contact TI Distributor or Sales Office
V62/06665-01XE	ACTIVE	-55 to 125		0.73 \| 1ku	SOIC (D) \| 16	View	2500 \| 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

Reported Distributor Inventory as of 11:12 AM GMT, 22 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 16 WeeksSN74AHC123AMDREP
Worldwide	DigiKey	>1k
TI Lead Time*: 16 WeeksSN74AHC123AMDREPG4
Worldwide	DigiKey	Available
TI Lead Time*: 16 WeeksV62/06665-01XE
None Reported View Distributors
View all Distributors

** 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
SN74AHC123AMDREP	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74AHC123AMDREPG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
V62/06665-01XE	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

Most useful technical documents for SN74AHC123A-EP

Datasheet

SN74AHC123A-EP (Rev. A) (PDF, 538 KB)
14 Mar 2007

Application Notes

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28 May 2003 Read Abstract
Implications of Slow or Floating CMOS Inputs (Rev. C) (HTM, 8 KB) 7099 views
01 Feb 1998 Read Abstract
Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A) (HTM, 8 KB) 2430 views
01 Aug 1997 Read Abstract
Benefits & Issues of Migrating 5-V and 3.3-V Logic to Lower-Voltage Supplies (Rev. A) (HTM, 9 KB) 706 views
08 Sep 1999 Read Abstract
Migration From 3.3-V To 2.5-V Power Supplies For Logic Devices (HTM, 9 KB) 640 views
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Texas Instruments Little Logic Application Report (HTM, 8 KB) 2379 views
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01 Jun 1997 Read Abstract

View Application Notes for Monostable Multivibrators

User Guides

LOGIC Pocket Data Book (Rev. B) (PDF, 6001 KB) 47290 views
16 Jan 2007

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 90505 views
23 Jul 2009

More Literature

Logic Cross-Reference (Rev. A) (PDF, 2938 KB) 15408 views
07 Oct 2003
Design Summary for WCSP Little Logic (Rev. B) (PDF, 295 KB) 1823 views
04 Nov 2004
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01 Apr 1998
Military Advanced High-Speed CMOS Logic (AHC/AHCT) (PDF, 85 KB) 785 views
01 Apr 1998
AHC/AHCT Designer's Guide February 2000 (Rev. D) (HTM, 8 KB) 1491 views
24 Feb 2000 Read Abstract

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SN74AHC123A-EP Status: ACTIVE

Enhanced Product Dual Retriggerable Monostable Multivibrator

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Datasheet

Other qualified versions of SN74AHC123A-EP

Customers Who Evaluated This Product Also Evaluated