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SN74AHCT157NE4 데이터시트(PDF) 4 Page - Texas Instruments |
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SN74AHCT157NE4 데이터시트(HTML) 4 Page - Texas Instruments |
4 / 14 page SN54AHCT157, SN74AHCT157 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS SCLS347K – MAY 1996 – REVISED JULY 2003 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC TA = 25°C SN54AHCT157 SN74AHCT157 UNIT PARAMETER TEST CONDITIONS VCC MIN TYP MAX MIN MAX MIN MAX UNIT V IOH = –50 mA 45 V 4.4 4.5 4.4 4.4 V VOH IOH = –8 mA 4.5 V 3.94 3.8 3.8 V V IOL = 50 mA 45 V 0.1 0.1 0.1 V VOL IOL = 8 mA 4.5 V 0.36 0.44 0.44 V II VI = 5.5 V or GND 0 V to 5.5 V ±0.1 ±1* ±1 mA ICC VI = VCC or GND, IO = 0 5.5 V 2 20 20 mA ∆ICC† One input at 3.4 V, Other inputs at VCC or GND 5.5 V 1.35 1.5 1.5 mA Ci VI = VCC or GND 5 V 2 10 10 pF * On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V. † This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or VCC. switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) PARAMETER FROM TO LOAD TA = 25°C SN54AHCT157 SN74AHCT157 UNIT PARAMETER (INPUT) (OUTPUT) CAPACITANCE MIN TYP MAX MIN MAX MIN MAX UNIT tPLH AorB Y CL =15 pF 4.1** 6.4** 1** 7.5** 1 7.5 ns tPHL A or B Y CL = 15 pF 4.1** 6.4** 1** 7.5** 1 7.5 ns tPLH A/B Y CL =15 pF 5.3** 8.1** 1** 9.5** 1 9.5 ns tPHL A/B Y CL = 15 pF 5.3** 8.1** 1** 9.5** 1 9.5 ns tPLH G Y CL =15 pF 5.6** 8.6** 1** 10** 1 10 ns tPHL G Y CL = 15 pF 5.6** 8.6** 1** 10** 1 10 ns tPLH AorB Y CL =50 pF 5.6 8.7 1 10.8 1 9.8 ns tPHL A or B Y CL = 50 pF 5.6 8.7 1 10.8 1 9.8 ns tPLH A/B Y CL =50 pF 6.8 10.4 1 13.2 1 12 ns tPLH A/B Y CL = 50 pF 6.8 10.4 1 13.2 1 12 ns tPLH G Y CL =50 pF 7.1 11 1 13.5 1 12 ns tPHL G Y CL = 50 pF 7.1 11 1 13.5 1 12 ns ** On products compliant to MIL-PRF-38535, this parameter is not production tested. noise characteristics VCC = 5 V, CL = 50 pF, TA = 25°C (see Note 4) PARAMETER SN74AHCT157 UNIT PARAMETER MIN TYP MAX UNIT VOL(P) Quiet output, maximum dynamic VOL 0.4 0.8 V VOL(V) Quiet output, minimum dynamic VOL –0.4 –0.8 V VOH(V) Quiet output, minimum dynamic VOH 4.8 V VIH(D) High-level dynamic input voltage 2 V VIL(D) Low-level dynamic input voltage 0.8 V NOTE 4: Characteristics are for surface-mount packages only. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. |
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