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SN54AS163 Datasheet(PDF) 8 Page - Texas Instruments |
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SN54AS163 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 27 page SN54ALS161B, SN54ALS162B, SN54ALS163B, SN54AS161, SN54AS163 SN74ALS161B, SN74ALS163B, SN74AS161, SN74AS163 SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS SDAS276A – DECEMBER 1994 – REVISED JULY 2000 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended operating conditions (unless otherwise noted) (see Figure 1) SN54ALS161B SN54ALS162B SN54ALS163B SN74ALS161B SN74ALS163B UNIT MIN MAX MIN MAX fclock Clock frequency 22 40 MHz t Pulse duration CLR high or low 20 12.5 ns tw Pulse duration ’ALS161B CLR low 20 15 ns ↑ A, B, C, D 50 15 ↑ LOAD 20 15 ↑ ’ALS161B ENP ENT 25 15 tsu Setup time, before CLK ↑ SN54ALS162B, ’ALS163B ENP, ENT 20 15 ns ’ALS161B CLR inactive 10 10 SN54ALS162B ’ALS163B CLR low 20 15 SN54ALS162B, ’ALS163B CLR high 20 10 th Hold time, all synchronous inputs after CLK ↑ 0 0 ns switching characteristics over recommended operating conditions (unless otherwise noted) (see Figure 1) PARAMETER FROM TO SN54ALS161B SN74ALS161B UNIT PARAMETER (INPUT) (OUTPUT) MIN MAX MIN MAX UNIT fmax 22 40 MHz tPLH CLK RCO 5 34 5 20 ns tPHL CLK RCO 5 27 5 20 ns tPLH CLK Any Q 4 19 4 15 ns tPHL CLK Any Q 6 25 6 20 ns tPLH ENT RCO 3 18 3 13 ns tPHL ENT RCO 3 17 3 13 ns tPHL CLR Any Q 8 27 8 24 ns tPHL CLR RCO 11 32 11 23 ns switching characteristics over recommended operating conditions (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) SN54ALS162B SN54ALS163B SN74ALS163B UNIT (INPUT) (OUTPUT) MIN MAX MIN MAX fmax 22 40 MHz tPLH CLK RCO 5 25 5 20 ns tPHL CLK RCO 5 25 5 20 ns tPLH CLK Any Q 4 18 4 15 ns tPHL CLK Any Q 6 25 6 20 ns tPLH ENT RCO 3 16 3 13 ns tPHL ENT RCO 3 16 3 13 ns |
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