Product details


Function Counter Bits (#) 4 Technology Family HC VCC (Min) (V) 2 VCC (Max) (V) 6 Input type Standard CMOS Output type Push-Pull Features Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode open-in-new Find other Counter, arithmetic & parity function ICs

Package | Pins | Size

PDIP (N) 14 181 mm² 19.3 x 9.4 SOIC (D) 14 52 mm² 8.65 x 6 open-in-new Find other Counter, arithmetic & parity function ICs


  • Can Be Configured to Divide By 2, 8, and 16
  • Asynchronous Master Reset
  • Fanout (Over Temperature Range)
    • Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
    • Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
  • Wide Operating Temperature Range . . . –55°C to 125°C
  • Balanced Propagation Delay and Transition Times
  • Significant Power Reduction Compared to LSTTL Logic ICs
  • HC Types
    • 2V to 6V Operation
    • High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
  • HCT Types
    • 4.5V to 5.5V Operation
    • Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
    • CMOS Input Compatibility, Il 1µA at VOL , VOH

Data sheet acquired from Harris Semiconductor

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The CD74HC93 and CD74HCT93 are high-speed silicon-gate CMOS devices and are pin-compatible with low power Schottky TTL (LSTTL). These 4-bit binary ripple counters consist of four master-slave flip-flops internally connected to provide a divide-by-two section and a divide-by-eight section. Each section has a separate clock input (CP0\ and CP1\) to initiate state changes of the counter on the HIGH to LOW clock transition. State changes of the Qn outputs do not occur simultaneously because of internal ripple delays. Therefore, decoded output signals are subject to decoding spikes and should not be used for clocks or strobes.

A gated AND asynchronous master reset (MR1 and MR2 is provided which overrides both clocks and resets (clears) all flip-flops.

Because the output from the divide by two section is not internally connected to the succeeding stages, the device may be operated in various counting modes.

In a 4-bit ripple counter the output Q0 must be connected externally to input CP1\. The input count pulses are applied to clock input CP0\. Simultaneous frequency divisions of 2, 4, 8, and 16 are performed at the Q0, Q1, Q2, and Q3 outputs as shown in the function table. As a 3-bit ripple counter the input count pulses are applied to input CP1\.

Simultaneous frequency divisions of 2, 4, and 8 are available at the Q1, Q2, Q3 outputs. Independent use of the first flip-flop is available if the reset function coincides with the reset of the 3-bit ripple-through counter.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 15
Type Title Date
* Datasheet CD74HC93, CD74HCT93 datasheet (Rev. C) Aug. 21, 2003
Selection guide Logic Guide (Rev. AB) Jun. 12, 2017
Application note Implications of Slow or Floating CMOS Inputs (Rev. D) Jun. 23, 2016
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) Dec. 02, 2015
User guide LOGIC Pocket Data Book (Rev. B) Jan. 16, 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection Jul. 08, 2004
User guide Signal Switch Data Book (Rev. A) Nov. 14, 2003
More literature Logic Cross-Reference (Rev. A) Oct. 07, 2003
Application note TI IBIS File Creation, Validation, and Distribution Processes Aug. 29, 2002
Application note CMOS Power Consumption and CPD Calculation (Rev. B) Jun. 01, 1997
Application note Designing With Logic (Rev. C) Jun. 01, 1997
Application note Input and Output Characteristics of Digital Integrated Circuits Oct. 01, 1996
Application note Live Insertion Oct. 01, 1996
Application note SN54/74HCT CMOS Logic Family Applications and Restrictions May 01, 1996
Application note Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc Apr. 01, 1996

Design & development

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

Hardware development

This EVM is designed to support any logic device that has a D, DW, DB, NS, PW, P, N, or DGV package in a 14 to 24 pin count.
  • Board design allows for versatility in evaluation
  • Supports a wide-range of logic devices

CAD/CAE symbols

Package Pins Download
PDIP (N) 14 View options
SOIC (D) 14 View options

Ordering & quality

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