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74HC4520D Datenblatt(PDF) 6 Page - NXP Semiconductors |
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74HC4520D Datenblatt(HTML) 6 Page - NXP Semiconductors |
6 / 7 page December 1990 6 Philips Semiconductors Product specification Dual 4-bit synchronous binary counter 74HC/HCT4520 DC CHARACTERISTICS FOR 74HCT For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: standard ICC category: MSI Note to HCT types The value of additional quiescent supply current ( ∆ICC) for a unit load of 1 is given in the family specifications. To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below. AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr =tf = 6 ns; CL = 50 pF INPUT UNIT LOAD COEFFICIENT nCP0, nCP1 nMR 0.80 1.50 SYMBOL PARAMETER Tamb (°C) UNIT TEST CONDITIONS 74HCT VCC (V) WAVEFORMS +25 −40 to +85 −40 to +125 min. typ. max. min. max. min. max. tPHL/ tPLH propagation delay nCP0 to nQn 28 53 66 80 ns 4.5 Fig.8 tPHL/ tPLH propagation delay nCP1 to nQn 25 53 66 80 ns 4.5 Fig.8 tPHL propagation delay nMR to nQn 16 35 44 53 ns 4.5 Fig.9 tTHL/ tTLH output transition time 7 15 19 22 ns 4.5 Fig.8 tW clock pulse width HIGH or LOW 20 10 25 30 ns 4.5 Fig.7 tW master reset pulse width HIGH 20 12 25 30 ns 4.5 Fig.7 trem removal time nMR to nCP0; nCP1 0 −8 0 0 ns 4.5 Fig.7 tsu set-up time nCP1 to nCP0; nCP0 to nCP1 16 6 20 24 ns 4.5 Fig.8 fmax maximum clock pulse frequency 30 58 24 20 MHz 4.5 Fig.7 |
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