SDLS153A January   1981  – January 2016 SN74LS292 , SN74LS294

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Recommended Operating Conditions
    3. 6.3 Thermal Information
    4. 6.4 Electrical Characteristics
    5. 6.5 Switching Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Logic Diagrams
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Related Links
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
VCC(2) Supply voltage 7 V
Input voltage 7 V
TJ Junction temperature 150 °C
Tstg Storage temperature –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Voltage values are with respect to network ground terminal.

6.2 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)
MIN NOM MAX UNIT
VCC Supply voltage 4.75 5 5.25 V
VIH High-level input voltage 2 V
VIL Low-level input voltage 0.8 V
IOH High-level output current (Q only) –1.2 mA
IOL Low-level output current (Q only) 24 mA
fclock Clock frequency 0 30 MHz
tw Duration of clock input pulse 16 ns
tw Duration of clear pulse SN74LS292 55 ns
SN74LS294 35
tsu Clear inactive-state set-up time 15 ns
TA Operating free-air temperature 0 70 °C

6.3 Thermal Information

THERMAL METRIC(1) SN74LS292 UNIT
N (PDIP)
16 PINS
RθJA Junction-to-ambient thermal resistance 36.8 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 22.2 °C/W
RθJB Junction-to-board thermal resistance 17.0 °C/W
ψJT Junction-to-top characterization parameter 7.0 °C/W
ψJB Junction-to-board characterization parameter 16.8 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

6.4 Electrical Characteristics

over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS(1) MIN TYP(2) MAX UNIT
VIK VCC = MIN, II = –18 mA –1.5 V
VOH Q VCC = MIN, VIH = 2 V, IOH = –1.2 mA, VIL = MAX 2.4 3.4 V
VOL Q VCC = MIN, VIH = 2 V, VIL = MAX IOL = 12 mA 0.25 0.4 V
IOL = 24 mA 0.35 0.5
TP(3) IOL = 0.5 mA 0.25 0.4
II VCC = MAX, VI = 7 V 0.1 mA
IIH VCC = MAX, VI = 2.7 V 20 mA
IIL CLK1, CLK2 VCC = MAX, VI = 0.4 V –0.8 mA
All others VCC = MAX, VI = 0.4 V –0.4
IOS(4) Q VCC = MAX –30 –130 mA
ICC SN74LS292 VCC = MAX, all inputs grounded, all outputs open 40 75 mA
SN74LS294 VCC = MAX, all inputs grounded, all outputs open 30 50
(1) For conditions shown as MIN or MAX, use the appropriate value specified under Recommended Operating Conditions.
(2) All typical values are at VCC = 5 V, TA = 25°C.
(3) The TP output or outputs are not intended to drive external loads, but are solely provided for test points.
(4) The duration of the short-circuit should not exceed one second.

6.5 Switching Characteristics

VCC = 5 V, TA = 25°C, RL = 667 Ω, CL = 45 pF (see Figure 1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
fmax From CLK1 or 2 30 50 MHz
tPLH From CLK1 or 2, to Q; Modulo set at 22, A through # = LLLHL (xxxxLS292), A through D = LLHL (xxxxLS294) 55 90 ns
tPHL From CLK1 or 2, to Q; Modulo set at 22, A through # = LLLHL (xxxxLS292), A through D = LLHL (xxxxLS294) 80 120 ns
From CLR, to Q SN74LS292 85 130
SN74LS294 35 65
SN74LS292 SN74LS294 switching_loads_SDLS153.gif Figure 1. Switching Loads
SN74LS292 SN74LS294 timing_diagram_SDLS153.gif Figure 2. Timing Diagram

6.6 Typical Characteristics

SN74LS292 SN74LS294 typicalcharvol.gif Figure 3. VOL vs IOL