Mc14553B SWITCHING CHARACTERISTICS (Note 6. )(CL= 50 pF, TA=25C) Characteristic Figure Symbol (Note 7) Output Rise and Fall Time tTLH, tTHL=(1.5 ns/pF)CL+ 25 ns 100 tTLH, tTHL=(0.75 ns/pF)CL+ 12.5 TLH, tTHL=(0.55 ns/pF)CL+9.5ns Clock to BCD Out tPLH 500500500 900 1800 500 Clock to Overflow 1200 200 Reset to bcd out 1800 300 600 Clock to Latch Enable Setup Time 50 Master Reset to Latch Enable Setup Time 200 Removal Time Latch Enable to clock Clock pulse width twH(cl) 5505 150 Reset Pulse Width tWH(R) 00 Reset Removal Time 180 Input Clock Frequency 500 MHz 5 Input Clock Rise Time 550560 No Limit Disable. MR. Latch Enable 15 Rise and Fall Times 4.0 Scan Oscillator Frequency 15/C1 (C1 measured in uF) 4.2C1 7C1 6. The formulas given are for the typical characteristics only at 25C. 7. Data labelled"Typ" is not to be used for design purposes but is intended as an indication of the IC's potential performance httpllonsemi.comMC14553B http://onsemi.com 4 ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ SWITCHING CHARACTERISTICS (Note 6.) (CL = 50 pF, TA = 25
C) Characteristic Figure Symbol VDD Min Typ (Note 7.) Max Unit Output Rise and Fall Time tTLH, tTHL = (1.5 ns/pF) CL + 25 ns tTLH, tTHL = (0.75 ns/pF) CL + 12.5 ns tTLH, tTHL = (0.55 ns/pF) CL + 9.5 ns 2a tTLH, tTHL 5.0 10 15 — — — 100 50 40 200 100 80 ns Clock to BCD Out 2a tPLH, tPHL 5.0 10 15 — — — 900 500 200 1800 1000 400 ns Clock to Overflow 2a tPHL 5.0 10 15 — — — 600 400 200 1200 800 400 ns Reset to BCD Out 2b tPHL 5.0 10 15 — — — 900 500 300 1800 1000 600 ns Clock to Latch Enable Setup Time Master Reset to Latch Enable Setup Time 2b tsu 5.0 10 15 600 400 200 300 200 100 — — — ns Removal Time Latch Enable to Clock 2b trem 5.0 10 15 – 80 – 10 0 – 200 – 70 – 50 — — — ns Clock Pulse Width 2a tWH(cl) 5.0 10 15 550 200 150 275 100 75 — — — ns Reset Pulse Width 2b tWH(R) 5.0 10 15 1200 600 450 600 300 225 — — — ns Reset Removal Time — trem 5.0 10 15 – 80 0 20 – 180 – 50 – 30 — — — ns Input Clock Frequency 2a fcl 5.0 10 15 — — — 1.5 5.0 7.0 0.9 2.5 3.5 MHz Input Clock Rise Time 2b tTLH 5.0 10 15 No Limit ns Disable, MR, Latch Enable Rise and Fall Times — tTLH, tTHL 5.0 10 15 — — — — — — 15 5.0 4.0 µs Scan Oscillator Frequency (C1 measured in µF) 1 fosc 5.0 10 15 — — — 1.5/C1 4.2/C1 7.0/C1 — — — Hz 6. The formulas given are for the typical characteristics only at 25
C. 7. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance