Product details

Number of channels (#) 2 Supply voltage (Min) (V) 4.75 Supply voltage (Max) (V) 5.25 Technology Family LS Input type Bipolar Output type Push-Pull ICC (uA) 20000 IOL (Max) (mA) 8 IOH (Max) (mA) -0.4 Features Standard speed (tpd > 50ns), Retriggerable
Number of channels (#) 2 Supply voltage (Min) (V) 4.75 Supply voltage (Max) (V) 5.25 Technology Family LS Input type Bipolar Output type Push-Pull ICC (uA) 20000 IOL (Max) (mA) 8 IOH (Max) (mA) -0.4 Features Standard speed (tpd > 50ns), Retriggerable
PDIP (N) 16 181 mm² 19.3 x 9.4 SOIC (D) 16 59 mm² 9.9 x 6 SOP (NS) 16 80 mm² 10.2 x 7.8
  • Will Not Trigger from Clear
  • D-C Triggered from Active-High or Active-Low Gated Logic Inputs
  • Retriggerable for Very Long Output Pulses, Up to 100% Duty Cycle
  • Overriding Clear Terminates Output Pulse
  • 'LS422 Has Internal Timing Resistor

An external timing capacitor may be connected between Cext and Rext/Cext (positive).

To use the internal timing resistor of 'LS422, connect Rint to VCC.

For improved pulse width accuracy and repeatability, connect an external resistor between Rext/Cext and VCC with Rint open-circuited.

To obtain variable pulse widths, connect an external variable resistance between Rint or Rext/Cext and VCC.

 

  • Will Not Trigger from Clear
  • D-C Triggered from Active-High or Active-Low Gated Logic Inputs
  • Retriggerable for Very Long Output Pulses, Up to 100% Duty Cycle
  • Overriding Clear Terminates Output Pulse
  • 'LS422 Has Internal Timing Resistor

An external timing capacitor may be connected between Cext and Rext/Cext (positive).

To use the internal timing resistor of 'LS422, connect Rint to VCC.

For improved pulse width accuracy and repeatability, connect an external resistor between Rext/Cext and VCC with Rint open-circuited.

To obtain variable pulse widths, connect an external variable resistance between Rint or Rext/Cext and VCC.

 

The 'LS422 and 'LS423 are identical to 'LS122 and 'LS123 except they cannot be triggered via clear.

These d-c triggered multivibrators feature output-pulse-width control by three methods. The basic pulse time is programmed by selection of external resistance and capacitance values (see typical application data). The 'LS422 contains an internal timing resistor that allows the circuits to be used with only an external capacitor, if so desired. Once triggered, the basic pulse width may be extended by retriggering the gated low-level-active (A) or high-level-active (B) inputs, or be reduced by use of the overriding clear. Figure 1 illustrates pulse control by retriggering and early clear.

The 'LS422 and 'LS423 have enough Schmitt hysteresis to ensure jitter-free triggering from the B input with transition rates as slow as 0.1 millivolt per nanosecond. The 'LS422 Rint is nominally 10 k ohms.

The SN54LS422 and SN54LS423 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LS422 and SN74LS423 are characterized for operation from 0°C to 70°C.FIGURE 1-TYPICAL INPUT/OUTPUT PULSES

 

The 'LS422 and 'LS423 are identical to 'LS122 and 'LS123 except they cannot be triggered via clear.

These d-c triggered multivibrators feature output-pulse-width control by three methods. The basic pulse time is programmed by selection of external resistance and capacitance values (see typical application data). The 'LS422 contains an internal timing resistor that allows the circuits to be used with only an external capacitor, if so desired. Once triggered, the basic pulse width may be extended by retriggering the gated low-level-active (A) or high-level-active (B) inputs, or be reduced by use of the overriding clear. Figure 1 illustrates pulse control by retriggering and early clear.

The 'LS422 and 'LS423 have enough Schmitt hysteresis to ensure jitter-free triggering from the B input with transition rates as slow as 0.1 millivolt per nanosecond. The 'LS422 Rint is nominally 10 k ohms.

The SN54LS422 and SN54LS423 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LS422 and SN74LS423 are characterized for operation from 0°C to 70°C.FIGURE 1-TYPICAL INPUT/OUTPUT PULSES

 

Download

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 12
Type Title Date
* Data sheet Retriggerable Monostable Multivibrators datasheet 01 Mar 1988
Application note Designing With the SN74LVC1G123 Monostable Multivibrator (Rev. A) PDF | HTML 13 Mar 2020
Selection guide Logic Guide (Rev. AB) 12 Jun 2017
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dec 2015
User guide LOGIC Pocket Data Book (Rev. B) 16 Jan 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004
More literature Logic Cross-Reference (Rev. A) 07 Oct 2003
Application note TI IBIS File Creation, Validation, and Distribution Processes 29 Aug 2002
Application note Designing With Logic (Rev. C) 01 Jun 1997
Application note Designing with the SN54/74LS123 (Rev. A) 01 Mar 1997
Application note Input and Output Characteristics of Digital Integrated Circuits 01 Oct 1996
Application note Live Insertion 01 Oct 1996

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

14-24-LOGIC-EVM — Generic Logic EVM Supporting 14 through 24 Pin PW, DB, D, DW, NS, DYY, and DGV Packages

This EVM is designed to support any logic device that has a D, DW, DB, NS, PW, DYY or DGV package in a 14 to 24 pin count.

User guide: PDF | HTML
Not available on TI.com
Package Pins Download
PDIP (N) 16 View options
SO (NS) 16 View options
SOIC (D) 16 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos