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SN74LS221DBR Datasheet(PDF) 4 Page - Texas Instruments |
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SN74LS221DBR Datasheet(HTML) 4 Page - Texas Instruments |
4 / 26 page SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT TRIGGER INPUTS SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 schematics of inputs and outputs VCC Req Input VCC 100 Ω NOM Output EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS SN54/74221 SN54/74LS221 EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS VCC Req Input VCC Output 120 Ω NOM A Input: Req = 4 kΩ NOM B, CLR Input: Req = 2 kΩ NOM A Input: Req = 25 kΩ NOM B Input: Req = 15.4 kΩ NOM CLR: Req = 12.5 kΩ NOM |
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