Philips 74ABT2245D, 74ABT2245PW, 74ABT2245N, 74ABT2245DB Datasheet

INTEGRATED CIRCUITS

74ABT2245

Octal transceiver with direction pin with

30Ω series termination resistors (3-State)

	Product specification	1998 Jan 16
	Supersedes data of 1996 Sep 10
	IC23 Data Handbook

m n r

Philips Semiconductors	Product specification

Octal transceiver with direction pin

Ω 74ABT2245 and 30 series termination resistors (3-State)

FEATURES

•Octal bidirectional bus interface

•3-State buffers

•Output capability: +12mA/±32mA

•Latch-up protection exceeds 500mA per Jedec Std 17

•ESD protection exceeds 2000 V per MIL STD 833 Method 3015 and 200 V per Machine Model

•Power-up 3-State

•Live insertion/extraction permitted

•Same as 74ABT245-1

•Outputs include series resistance of 30Ω, making external termination resistors unnecessary

•Inputs are disabled during 3-State mode

DESCRIPTION

The 74ABT2245 high-performance BiCMOS device combines low static and dynamic power dissipation with high speed.

The 74ABT2245 device is an octal transceiver featuring non-inverting 3-State bus compatible outputs in both send and receive directions. The control function implementation minimizes external timing requirements. The device features an Output Enable

(OE) input for easy cascading and a Direction (DIR) input for direction control.

The 74ABT2245 is designed with 30Ω series resistance in both the High and Low states of the output. This design reduces line noise in applications such as memory address drivers, clock drivers, and bus receivers/transmitters.

The 74ABT2245 is the same as the 74ABT245-1. The part number has been changed to reflect industry standards.

QUICK REFERENCE DATA

	SYMBOL	PARAMETER			CONDITIONS	TYPICAL	UNIT
					Tamb = 25°C; GND = 0V
	tPLH	Propagation delay			CL = 50pF; VCC = 5V	3.9	ns
	tPHL	An to Bn or Bn to An
	CIN	Input capacitance DIR,			VI = 0V or VCC	4	pF
			OE
	CI/O	I/O pin capacitance			Outputs disabled; VO = 0V or VCC	7	pF
	ICCZ	Total supply current			Outputs disabled; VCC =5.5V	50	μA

ORDERING INFORMATION

PACKAGES	TEMPERATURE RANGE	OUTSIDE NORTH AMERICA	NORTH AMERICA	DWG NUMBER
20-Pin Plastic DIP	±40°C to +85°C	74ABT2245 N	74ABT2245 N	SOT146-1
20-Pin plastic SO	±40°C to +85°C	74ABT2245 D	74ABT2245 D	SOT163-1
20-Pin Plastic SSOP Type II	±40°C to +85°C	74ABT2245 DB	74ABT2245 DB	SOT339-1
20-Pin Plastic TSSOP Type I	±40°C to +85°C	74ABT2245 PW	7ABT2245PW DH	SOT360-1

	PIN CONFIGURATION							PIN DESCRIPTION
								PIN NUMBER	SYMBOL			NAME AND FUNCTION
	DIR	1	20	VCC
								1	DIR			Direction control input
	A0	2	19	OE
	A1	3	18	B0				2, 3, 4, 5, 6, 7, 8, 9	A0 ± A7			Data inputs/outputs (A side)
	A2	4	17	B1
								18, 17, 16, 15, 14,	B0 ± B7			Data inputs/outputs (B side)
	A3	5	16	B2				13, 12, 11
	A4	6	15	B3								Output enable input
								19	OE
	A5	7	14	B4								(active-Low)
	A6	8	13	B5				10	GND			Ground (0V)
	A7	9	12	B6
								20	VCC			Positive supply voltage
	GND	10	11	B7
			SA00121

1998 Jan 16

2

853-1761 18865

Philips Semiconductors	Product specification

Octal transceiver with direction pin

Ω 74ABT2245 and 30 series termination resistors (3-State)

LOGIC SYMBOL

1

	DIR	19
		OE
	A0	2
		18
		B0
	A1	3
		17
		B1
	A2	4
		16
		B2
	A3	5
		15
		B3
	A4	6
		14
		B4
	A5	7
		13
		B5
	A6	8
		12
		B6
	A7	9
		11
		B7
		SA00122

FUNCTION TABLE

			INPUTS			INPUTS/OUTPUTS
					DIR	An	Bn
		OE
		L			L	An = Bn	Inputs
		L			H	Inputs	Bn = An
		H			X	Z	Z
H	= High voltage level
L	= Low voltage level
X	= Don't care

Z = High impedance ºoffº state

SCHEMATIC OF EACH OUTPUT

VCC

LOGIC SYMBOL IEEE/IEC	OUTPUT

19

	G3
	3 EN1 (BA)
1	3 EN2 (AB)
		SA00237
	1
2	2	18
3		17
4		16
5		15
6		14
7		13
8		12
9		11
		SA00313

1998 Jan 16

3

Philips Semiconductors	Product specification

Octal transceiver with direction pin

Ω 74ABT2245 and 30 series termination resistors (3-State)

ABSOLUTE MAXIMUM RATINGS1, 2

SYMBOL	PARAMETER	CONDITIONS	RATING	UNIT
VCC	DC supply voltage		±0.5 to +7.0	V
IIK	DC input diode current	VI < 0	±18	mA
VI	DC input voltage3		±1.2 to +7.0	V
IOK	DC output diode current	VO < 0	±50	mA
V	DC output voltage3	output in Off or High state	±0.5 to +5.5	V
OUT
IOUT	DC output current	output in Low state	128	mA
Tstg	Storage temperature range		±65 to 150	°C

NOTES:

1.Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

2.The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.

3.The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

RECOMMENDED OPERATING CONDITIONS

SYMBOL	PARAMETER		LIMITS		UNIT
		Min		Max
VCC	DC supply voltage	4.5		5.5	V
VI	Input voltage	0		VCC	V
VIH	High-level input voltage	2.0			V
VIL	Low-level Input voltage			0.8	V
IOH	High-level output current			±32	mA
IOL	Low-level output current			12	mA
t/ v	Input transition rise or fall rate	0		5	ns/V
Tamb	Operating free-air temperature range	±40		+85	°C

1998 Jan 16

4