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SN74ALS161BDG4 Scheda tecnica(PDF) 10 Page - Texas Instruments |
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SN74ALS161BDG4 Scheda tecnica(HTML) 10 Page - Texas Instruments |
10 / 27 page SN54ALS161B, SN54ALS162B, SN54ALS163B, SN54AS161, SN54AS163 SN74ALS161B, SN74ALS163B, SN74AS161, SN74AS163 SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS SDAS276A – DECEMBER 1994 – REVISED JULY 2000 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended operating conditions (see Figure 1) SN54AS161 SN54AS163 SN74AS161 SN74AS163 UNIT MIN MAX MIN MAX fclock Clock frequency 65 75 MHz t Pulse duration CLR high or low 7.7 6.7 ns tw Pulse duration ’AS161 CLR low 10 8 ns ↑ A, B, C, D 10 8 ↑ LOAD 10 8 t Setup time before CLK ↑ ENP, ENT 10 8 ns tsu Setup time, before CLK ↑ ’AS161 CLR inactive 10 8 ns ’AS163 CLR low 14 12 ’AS163 CLR high (inactive) 10 9 th Hold time, all synchronous inputs after CLK ↑ 2 0 ns switching characteristics over recommended operating conditions (see Figure 1) PARAMETER FROM TO SN54AS161 SN74AS161 UNIT PARAMETER (INPUT) (OUTPUT) MIN MAX MIN MAX UNIT fmax 65* 75 MHz tPLH CLK RCO (with LOAD high) 1 8.5 1 8 ns tPLH CLK RCO (with LOAD low) 3 17.5 3 16.5 ns tPHL CLK RCO 2 14 2 12.5 ns tPLH CLK Any Q 1 7.5 1 7 ns tPHL CLK Any Q 2 14 2 13 ns tPLH ENT RCO 1.5 10 1.5 9 ns tPHL ENT RCO 1 9.5 1 8.5 ns tPHL CLR Any Q 2 14 2 13 ns tPHL CLR RCO 2 14 2 12.5 ns * On products compliant to MIL-PRF-38535, this parameter is not production tested. switching characteristics over recommended operating conditions (see Figure 1) PARAMETER FROM TO SN54AS163 SN74AS163 UNIT PARAMETER (INPUT) (OUTPUT) MIN MAX MIN MAX UNIT fmax 65* 75 MHz tPLH CLK RCO (with LOAD high) 1 8.5 1 8 ns tPLH CLK RCO (with LOAD low) 3 17.5 3 16.5 ns tPHL CLK RCO 2 14 2 12.5 ns tPLH CLK Any Q 1 7.5 1 7 ns tPHL CLK Any Q 2 14 2 13 ns tPLH ENT RCO 1.5 10 1.5 9 ns tPHL ENT RCO 1 9.5 1 8.5 ns * On products compliant to MIL-PRF-38535, this parameter is not production tested. |
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