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/HCT373 Octal D-type transparent latch; 3-state Product specification File under Integrated Circuits, IC06 September 1993
Philips Semiconductors Product specification Octal D-type transparent latch; 3-state 74HC/HCT373 input and an output enable (OE) input are common to all latches. FEATURES • 3-state non-inverting outputs for bus oriented applications The “373” consists of eight D-type transparent latches with 3-state true outputs. When LE is HIGH, data at the Dn inputs enters the latches. In this condition the latches are transparent, i.e. a latch output will change state each time its corresponding D-input changes.
Philips Semiconductors Product specification Octal D-type transparent latch; 3-state 74HC/HCT373 PIN DESCRIPTION PIN NO. SYMBOL NAME AND FUNCTION 1 OE 3-state output enable input (active LOW) 2, 5, 6, 9, 12, 15, 16, 19 Q0 to Q7 3-state latch outputs 3, 4, 7, 8, 13, 14, 17, 18 D0 to D7 data inputs 10 GND ground (0 V) 11 LE latch enable input (active HIGH) 20 VCC positive supply voltage Fig.1 Pin configuration. September 1993 Fig.2 Logic symbol. 3 Fig.3 IEC logic symbol.
Philips Semiconductors Product specification Octal D-type transparent latch; 3-state 74HC/HCT373 FUNCTION TABLE INPUTS OPERATING MODES OE LE Dn INTERNAL LATCHES OUTPUTS Q0 to Q7 enable and read register (transparent mode) L H L L L L H H H H latch and read register L L L L l h L H L H latch register and disable outputs H H X X X X X X Z Z Notes Fig.4 Functional diagram. 1.
Philips Semiconductors Product specification Octal D-type transparent latch; 3-state 74HC/HCT373 DC CHARACTERISTICS FOR 74HC For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: bus driver ICC category: MSI AC CHARACTERISTICS FOR 74HC GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (°C) TEST CONDITIONS 74HC SYMBOL PARAMETER +25 −40 to +85 −40 to +125 min. typ. max. min. max. min. UNIT V WAVEFORMS CC (V) max.
Philips Semiconductors Product specification Octal D-type transparent latch; 3-state 74HC/HCT373 DC CHARACTERISTICS FOR 74HCT For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: bus driver 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 Octal D-type transparent latch; 3-state 74HC/HCT373 AC WAVEFORMS (1) HC : VM = 50%; VI = GND to VCC. HCT : VM = 1.3 V; VI = GND to 3 V. (1) HC : VM = 50%; VI = GND to VCC. HCT : VM = 1.3 V; VI = GND to 3 V. Fig.7 Fig.8 Waveforms showing the input (Dn) to output (Qn) propagation delays and the output transition times.
Philips Semiconductors Product specification Octal D-type transparent latch; 3-state PACKAGE OUTLINES See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.
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