Philips N74F641N, N74F642D, N74F642N, N74F641D Datasheet

INTEGRATED CIRCUITS

74F641/74F642* Transceivers

* Discontinued part. Please see the Discontinued Product List.

Product specification

1999 Jan 08

Supersedes data of 1989 Nov 27

IC15 Data Handbook

m n r

Philips Semiconductors	Product specification
Transceivers	74F641/74F642*

74F641 Octal Bus Transceiver with Common Output Enable, Non-Inverting (Open Collector) 74F642 Octal Bus Transceiver with Common Output Enable, Inverting (Open Collector)

FEATURES

•High-impedance NPN base inputs for reduced loading (20μA in High and Low states)

•Octal bidirectional bus interface

•Common Output Enable for both Transmit and Receive modes

•Open collector outputs sink 64mA

•Ð74F641, non-inverting Ð74F642, inverting

ORDERING INFORMATION

			COMMERCIAL RANGE
DESCRIPTION				VCC = 5V ±10%,			PKG DWG #
			Tamb = 0°C to +70°C
20-pin plastic DIP				N74F641N			SOT146-1
20-pin plastic SOL				N74F641D			SOT163-1
	TYPICAL				TYPICAL SUPPLY CURRENT
TYPE	PROPAGATION
						(TOTAL)
	DELAY
74F641		8.0ns				69mA
74F642		8.5ns				52mA

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

				PINS		DESCRIPTION	74F(U.L.)	LOAD VALUE
							HIGH/LOW	HIGH/LOW
	A0		- A7, B0 - B7		Data inputs		1.0/0.033	20μA/20μA
					Transmit/Receive input		2.0/0.067	40μA/40μA
	T/R
					Output Enable inputs		2.0/0.067	40μA/40μA
	OE
	A0		- A7		Data outputs		OC/40	OC/24mA
	B0		- B7		Data outputs		OC/106.7	OC/64mA

NOTE: One (1.0) FAST unit load is defined as: 20μA in the High state and 0.6mA in the Low state. OC = Open Collector.

PIN CONFIGURATION ± 74F641

						VCC
T/R		1		20
A0		2		19		OE
A1		3		18		B0
A2		4		17		B1
A3		5		16		B2
A4		6		15		B3
A5		7		14		B4
A6		8		13		B5
A7		9		12		B6
GND		10		11		B7
			SF00198

PIN CONFIGURATION ± 74F642

					VCC
T/R		1		20
A0		2		19		OE
A1		3		18	B0
A2		4		17	B1
A3		5		16	B2
A4		6		15	B3
A5		7		14	B4
A6		8		13	B5
A7		9		12	B6
GND		10		11	B7
			SF00198

* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08	2	853±0382 20616

Philips Semiconductors	Product specification
Transceivers	74F641/74F642*

LOGIC SYMBOL ± 74F641																												LOGIC SYMBOL ± 74F642
		2						3			4			5			6		7		8		9							2						3			4			5			6		7		8		9
					A0			A1			A2			A3			A4		A5		A6		A7										A0			A1			A2			A3			A4		A5		A6		A7
1
			T/R																									1
																															T/R
19
			OE																									19			OE
					B0				B1		B2				B3		B4		B5			B6		B7									B0				B1			B2			B3		B4		B5			B6		B7
		18						17			16			15			14		13		12		11							18						17			16			15			14		13		12		11
VCC =		Pin 20																					SF01154					VCC =		Pin 20																					SF01146
GND =		Pin 10																										GND =		Pin 10

LOGIC SYMBOL (IEEE/IEC) ± 74F641			LOGIC SYMBOL (IEEE/IEC) ± 74F642
19		G3	19		G3
		3EN1			3EN1
1		3EN2	1		3EN2
	2	18		2	18
		1			1
		2			2
	3	17		3	17
	4	16		4	16
	5	15		5	15
	6	14		6	14
	7	13		7	13
	8	12		8	12
	9	11		9	11
		SF01147			SF01148

* Discontinued part. Please see the Discontinued Products List.

1999 Jan 08

3