Philips N74F640N, N74F640D Datasheet

INTEGRATED CIRCUITS

74F640

Octal bus transceiver, inverting (3-State)

Product specification

1989 Nov 27

IC15 Data Handbook

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Philips Semiconductors	Product specification
Octal bus transceiver, inverting (3-State)	74F640

FEATURES

•High-impedance NPN base inputs for reduced loading

(70μA in High and Low states)

•Ideal for applications which require high-output drive and minimal bus loading

•Inverting version of 74F245

•Octal bidirectional bus interface

•3-State outputs sink 64mA and source 15mA

DESCRIPTION

The 74F640 is an octal transceiver featuring inverting 3-State bus compatible outputs in both transmit and receive directions. The B port outputs are capable of sinking 64mA and sourcing 15mA, providing very good capacitive drive characteristics. The device features an Output Enable (OE) input for easy cascading and Transmit/Receiver (T/R) input for direction control. The 3-State outputs, B0±B7, have been designed to prevent output bus loading if the power is removed from the device.

PIN CONFIGURATION

			1		20		VCC
T/R
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

		TYPICAL	TYPICAL SUPPLY CURRENT
	TYPE	PROPAGATION
			(TOTAL)
		DELAY
	74F640	3.5ns	78mA

						ORDERING INFORMATION
								COMMERCIAL RANGE
						DESCRIPTION		VCC = 5V ±10%,			PKG DWG #
								Tamb = 0°C to +70°C
						20-pin plastic DIP		N74F640N			SOT146-1
						20-pin plastic SOL		N74F640D			SOT163-1
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			3.5/0.115			70μA/70μA
					Output Enable input (active Low)			2.0/0.067			40μA/40μA
	OE
					Transmit/Receive input			2.0/0.067			40μA/40μA
	T/R
	A0 - A7				A port outputs			150/40		3.0mA/24mA
	B0 - B7				B port outputs			750/106.7		15mA/64mA

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

1989 Nov 27

2

853±0381 98171

Philips Semiconductors	Product specification
Octal bus transceiver, inverting (3-State)	74F640

LOGIC SYMBOL																																				LOGIC SYMBOL (IEEE/IEC)
																																				19				G3
					2								3				4			5			6		7		8		9											3EN1(BA)
																																				1				3EN2(AB)
										A0			A1				A2			A3			A4		A5		A6		A7
		19					OE																													2				1			18
																																								2
		1
																																				3							17
							T/R
																																											16
										B0				B1			B2				B3		B4		B5			B6		B7						4
																																											15
																																				5
					18								17				16			15			14		13		12		11								6						14
	VCC =				Pin 20																															7							13
	GND =				Pin 10																								SF01140								8						12
																																					9						11
																																											SF01141
FUNCTION TABLE
							INPUTS																				OUTPUTS
			OE										T/R
				L										L											Bus B data to Bus
																																	A
				L										H											Bus A data to Bus
																																	B
				H										X															Z
H	=	High voltage level
L	=	Low voltage level
X	=	Don't care
Z	= High impedance ªoffº state

LOGIC DIAGRAM

			A0	A1	A2	A3	A4	A5	A6	A7
			2	3	4	5	6	7	8	9
	OE 19
	T/R	1
			18	17	16	15	14	13	12	11
	VCC =	Pin 20	B0	B1	B2	B3	B4	B5	B6	B7
	GND =	Pin 10
										SF01142

1989 Nov 27

3

Philips Semiconductors	Product specification
Octal bus transceiver, inverting (3-State)	74F640

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limits set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free-air temperature range.)

	SYMBOL	PARAMETER		RATING	UNIT
	VCC	Supply voltage		±0.5 to +7.0	V
	VIN	Input voltage		±0.5 to +7.0	V
	IIN	Input current		±30 to +5	mA
	VOUT	Voltage applied to output in High output state		±0.5 to +VCC	V
	IOUT	Current applied to output in Low output state	A0±A7	48	mA
			B0±B7	128	mA
	Tamb	Operating free-air temperature range		0 to +70	°C
	Tstg	Storage temperature range		±65 to +150	°C

RECOMMENDED OPERATING CONDITIONS

SYMBOL	PARAMETER				LIMITS		UNIT
				MIN	NOM	MAX
VCC	Supply voltage			4.5	5.0	5.5	V
VIH	High-level input voltage			2.0			V
VIL	Low-level input voltage					0.8	V
IIK	Input clamp current					±18	mA
IOH	High-level output current		A0±A7			±3	mA
			B0±B7			±15	mA
IOL	Low-level output current		A0±A7			24	mA
			B0±B7			64	mA
Tamb	Operating free-air temperature range			0		70	°C

1989 Nov 27

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