SN74LS90D
ObsoleteCOUNTER/DIVIDER SINGLE 4-BIT DECADE UP 14-PIN SOIC TUBE
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SN74LS90D
ObsoleteCOUNTER/DIVIDER SINGLE 4-BIT DECADE UP 14-PIN SOIC TUBE
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Technical Specifications
Parameters and characteristics for this part
| Specification | SN74LS90D |
|---|---|
| Count Rate | 42 MHz |
| Direction | Up |
| Logic Type | Counter, Decade |
| Mounting Type | Surface Mount |
| Number of Bits per Element | 4 |
| Number of Elements | 1 |
| Operating Temperature [Max] | 70 °C |
| Operating Temperature [Min] | 0 °C |
| Package / Case | 14-SOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Reset | Asynchronous |
| Trigger Type | Negative Edge |
| Voltage - Supply [Max] | 5.25 V |
| Voltage - Supply [Min] | 4.75 V |
SN74LS90 Series
Decade Counter
| Part | Logic Type | Trigger Type | Number of Elements | Reset | Voltage - Supply [Min] | Voltage - Supply [Max] | Mounting Type | Operating Temperature [Max] | Operating Temperature [Min] | Package / Case [x] | Package / Case [y] | Package / Case | Direction | Count Rate | Number of Bits per Element | Supplier Device Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments | Counter Decade | Negative Edge | 1 | Asynchronous | 4.75 V | 5.25 V | Surface Mount | 70 °C | 0 °C | 0.154 in | 3.9 mm | 14-SOIC | Up | 42 MHz | 4 | |
 Texas Instruments | Counter Decade | Negative Edge | 1 | Asynchronous | 4.75 V | 5.25 V | Surface Mount | 70 °C | 0 °C | 0.154 in | 3.9 mm | 14-SOIC | Up | 42 MHz | 4 | |
 Texas Instruments | Counter Decade | Negative Edge | 1 | Asynchronous | 4.75 V | 5.25 V | Surface Mount | 70 °C | 0 °C | 0.209 " | 5.3 mm | 14-SOIC | Up | 42 MHz | 4 | 14-SO |
 Texas Instruments | Counter Decade | Negative Edge | 1 | Asynchronous | 4.75 V | 5.25 V | Through Hole | 70 °C | 0 °C | 0.3 " | 7.62 mm | 14-DIP | Up | 42 MHz | 4 | |
Texas Instruments | Counter Decade | Negative Edge | 1 | Asynchronous | 4.75 V | 5.25 V | Surface Mount | 70 °C | 0 °C | 0.154 in | 3.9 mm | 14-SOIC | Up | 42 MHz | 4 | |
 Texas Instruments | Counter Decade | Negative Edge | 1 | Asynchronous | 4.75 V | 5.25 V | Surface Mount | 70 °C | 0 °C | 0.154 in | 3.9 mm | 14-SOIC | Up | 42 MHz | 4 |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 2.90 | |
| 193 | $ 1.56 | |||
| Texas Instruments | TUBE | 1 | $ 2.19 | |
| 100 | $ 1.92 | |||
| 250 | $ 1.34 | |||
| 1000 | $ 1.08 | |||
Description
General part information
SN74LS90 Series
Each of these monolithic counters contains four master-slave flip-flops and additional gating to provide a divide-by-two counter and a three-stage binary counter for which the count cycle length is divide-by-five for the '90A and 'LS90, divide-by-six for the '92A and 'LS92, and the divide-by eight for the '93A and 'LS93.
All of these counters have a gated zero reset and the '90A and 'LS90 also have gated set-to-nine inputs for use in BCD nine's complement applications.
To use their maximum count length (decade, divide-by-twelve, or four-bit binary) of these counters, the CKB input is connected to the QAoutput. The input count pulses are applied to CKA input and the outputs are as described in the appropriate function table. A symmetrical divide-by-ten count can be obtained from the '90A or 'LS90 counters by connecting the QDoutput to the CKA input and applying the input count to the CKB input which gives a divide-by-ten square wave at output QA.
Documents
Technical documentation and resources