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SN74ALS561ADW Datasheet(PDF) 7 Page - Texas Instruments |
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SN74ALS561ADW Datasheet(HTML) 7 Page - Texas Instruments |
7 / 9 page SN54ALS561A, SN74ALS561A SYNCHRONOUS 4-BIT COUNTERS WITH 3-STATE OUTPUTS SDAS225A – DECEMBER 1982 – REVISED JANUARY 1995 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX† UNIT SN54ALS561A SN74ALS561A MIN MAX MIN MAX fmax 20 30 MHz tPLH CLK Any Q 4 15 4 12 ns tPHL CLK Any Q 5 21 5 18 ns tPLH CLK RCO 9 35 9 29 ns tPHL CLK RCO 8 29 8 24 ns tPLH CLK CCO 8 35 8 26 ns tPHL CLK CCO 5 20 5 16 ns tPLH ALOAD Any Q 10 38 10 35 ns tPHL ALOAD Any Q 7 27 7 23 ns tPLH ALOAD RCO 15 50 15 40 ns tPHL ALOAD RCO 12 35 12 30 ns tPLH ALOAD CCO 25 65 25 55 ns tPHL ALOAD CCO 12 42 12 33 ns tPLH ABCor D Any Q 8 35 8 30 ns tPHL A, B, C, or D Any Q 7 27 7 22 ns tPLH ENT RCO 5 20 5 16 ns tPHL ENT RCO 4 18 4 14 ns tPLH ENT CCO 12 35 12 32 ns tPHL ENT CCO 4 15 4 12 ns tPLH ENP CCO 5 22 5 18 ns tPHL ENP CCO 4 14 4 12 ns tPHL ACLR Any Q 7 28 7 22 ns tPZH OE Any Q 5 24 5 19 ns tPZL OE Any Q 8 28 8 23 ns tPHZ OE Any Q 2 12 2 10 ns tPLZ OE Any Q 2 20 4 15 ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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