INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications • The IC06 74HC/HCT/HCU/HCMOS Logic Package Information • The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines 74HC/HCT4520 Dual 4-bit synchronous binary counter Product specification File under Integrated Circuits, IC06 December 1990
Philips Semiconductors Product specification Dual 4-bit synchronous binary counter 74HC/HCT4520 from all four bit positions (nQ0 to nQ3) and an active HIGH overriding asynchronous master reset input (nMR). FEATURES • Output capability: standard The counter advances on either the LOW-to-HIGH transition of nCP0 if nCP1 is HIGH or the HIGH-to-LOW transition of nCP1 if nCP0 is LOW.
Philips Semiconductors Product specification Dual 4-bit synchronous binary counter 74HC/HCT4520 PIN DESCRIPTION PIN NO. SYMBOL NAME AND FUNCTION 1, 9 1CP0, 2CP0 clock inputs (LOW-to-HIGH, edge-triggered) 2, 10 1CP1, 2CP1 clock inputs (HIGH-to-LOW, edge-triggered) 3, 4, 5, 6 1Q0 to 1Q3 data outputs 7, 15 1MR, 2MR asynchronous master reset inputs (active HIGH) 8 GND ground (0 V) 11, 12, 13, 14 2Q0 to 2Q3 data outputs 16 VCC positive supply voltage Fig.1 Pin configuration.
Philips Semiconductors Product specification Dual 4-bit synchronous binary counter 74HC/HCT4520 FUNCTION TABLE nCP0 nCP1 MR MODE ↑ H L counter advances L ↓ L counter advances ↓ X L no change X ↑ L no change ↑ L L no change H ↓ L no change X X H Q0 to Q3 = LOW Notes 1. H = HIGH voltage level L = LOW voltage level X = don’t care ↑ = LOW-to-HIGH clock transition ↓ = HIGH-to-LOW clock transition Fig.4 Functional diagram. Fig.5 Logic diagram (one counter). Fig.
Philips Semiconductors Product specification Dual 4-bit synchronous binary counter 74HC/HCT4520 DC CHARACTERISTICS FOR 74HC For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: standard ICC category: MSI AC CHARACTERISTICS FOR 74HC GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (°C) TEST CONDITIONS 74HC SYMBOL PARAMETER min. +25 −40 to +85 typ. max. min. max. −40 to +125 min. UNIT VCC (V) WAVEFORMS max.
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.
Philips Semiconductors Product specification Dual 4-bit synchronous binary counter 74HC/HCT4520 AC WAVEFORMS Conditions: nCP1 = HIGH while nCP0 is triggered on a LOW-to-HIGH transition; tW and trem also apply when nCP0 = LOW and nCP1 is triggered on a HIGH-to-LOW transition. (1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3 V; VI = GND to 3 V. Fig.7 Waveforms showing removal time for nMR; minimum nCP0, nCP1, nMR pulse widths and maximum clock pulse frequency. (1) HC : VM = 50%; VI = GND to VCC.
