Philips 74HCT7541U, 74HCT7541N, 74HCT7541D, 74HC7541U, 74HC7541N Datasheet

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/HCT7541

Octal Schmitt trigger buffer/line driver; 3-state

Product specification			December 1990
Supersedes data of March 1988
File under Integrated Circuits, IC06

Philips Semiconductors	Product specification
Octal Schmitt trigger buffer/line driver; 3-state	74HC/HCT7541

FEATURES

·Non-inverting outputs

·Schmitt trigger action on all data inputs

·Output capability: bus driver

·ICC category: MSI

GENERAL DESCRIPTION

The 74HC/HCT7541 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

QUICK REFERENCE DATA

GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns

The 74HC/HCT7541 are octal Schmitt trigger non-inverting buffer/line drivers with 3-state outputs. The 3-state outputs are controlled by the output enable inputs OE1 and OE2.

A HIGH on OEn causes the outputs to assume a high impedance OFF-state.

The Schmitt trigger action in the data inputs transforms slowly changing input signals into sharply defined jitter-free output signals.

The “7541” is identical to the “541” but has hysteresis on the data inputs.

	SYMBOL	PARAMETER			CONDITIONS	TYPICAL		UNIT
						HC	HCT
	tPHL/ tPLH	propagation delay An to		n	CL = 15 pF; VCC = 5 V	10	16	ns
			Y
	CI	input capacitance				3.5	3.5	pF
	CPD	power dissipation capacitance per buffer			notes 1 and 2	30	32	pF

Notes

1. CPD is used to determine the dynamic power dissipation (PD in mW): PD = CPD ´ VCC2 ´ fi + å (CL ´ VCC2 ´ fo) where:

fi = input frequency in MHz

fo = output frequency in MHz

å (CL ´ VCC2 ´ fo) = sum of outputs

CL = output load capacitance in pF

VCC = supply voltage in V

2. For HC the condition is VI = GND to VCC

For HCT the condition is VI = GND to VCC - 1.5 V

ORDERING INFORMATION

See “74HC/HCT/HCU/HCMOS Logic Package Information”.

December 1990

2

Philips Semiconductors							Product specification
Octal Schmitt trigger buffer/line driver; 3-state							74HC/HCT7541
PIN DESCRIPTION
PIN NO.		SYMBOL				NAME AND FUNCTION
1, 19			1,		2	output enable inputs (active LOW)
		OE		OE
2, 3, 4, 5, 6, 7, 8, 9		A0 to A7				data inputs
10		GND				ground (0 V)
18, 17, 16, 15, 14, 13, 12, 11		Y0 to Y7				bus outputs
20		VCC				positive supply voltage

Fig.2 Logic symbol.

Fig.3 IEC logic symbol.

Fig.1 Pin configuration.

December 1990

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