Philips 74ABT2952PW, 74ABT2952N, 74ABT2952DB, 74ABT2952D Datasheet

INTEGRATED CIRCUITS

74ABT2952

Octal registered transceiver (3-State)

	Product specification	1998 Feb 11
	Supersedes data of 1995 Jun 15
	IC23 Data Handbook

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Philips Semiconductors	Product specification
Octal registered transceiver (3-State)	74ABT2952

FEATURES

•8-bit registered transceiver

•Independent registers for A and B buses

•Output capability: +64mA/±32mA

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

•ESD protection exceeds 2000V per MIL STD 883 Method 3015 and 200V per Machine Model

•Power-up 3-State

•Power-up reset

•Live insertion/extraction permitted

DESCRIPTION

The 74ABT2952 high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive.

The 74ABT2952 device is an 8-bit registered transceiver. Two 8-bit back-to-back registers store data flowing in both directions between two bidirectional buses. Data applied to the inputs is entered and stored on the rising edge of the Clock (CPXX) provided that the Clock Enable (CEXX) is Low. The data is then present at the 3-State output buffers, but is only accessible when the Output Enable (OEXX) is Low. Data flow from A inputs to B outputs is the same as for B inputs to A outputs.

QUICK REFERENCE DATA

	SYMBOL	PARAMETER	CONDITIONS	TYPICAL	UNIT
			Tamb = 25°C; GND = 0V
	tPLH	Propagation delay
		CPBA to An or	CL = 50pF; VCC = 5V	5.7	ns
	tPHL
		CPAB to Bn
	CIN	Input capacitance	VI = 0V or VCC	4	pF
	CI/O	I/O capacitance	Outputs disabled; VO = 0V or VCC	7	pF
	ICCZ	Total supply current	Outputs disabled; VCC =5.5V	110	μA

ORDERING INFORMATION

PACKAGES	TEMPERATURE RANGE	OUTSIDE NORTH AMERICA	NORTH AMERICA	DWG NUMBER
24-Pin Plastic DIP	±40°C to +85°C	74ABT2952 N	74ABT2952 N	SOT222-1
24-Pin plastic SO	±40°C to +85°C	74ABT2952 D	74ABT2952 D	SOT137-1
24-Pin Plastic SSOP Type II	±40°C to +85°C	74ABT2952 DB	74ABT2952 DB	SOT340-1
24-Pin Plastic TSSOP Type I	±40°C to +85°C	74ABT2952 PW	7ABT2952PW DH	SOT355-1

PIN CONFIGURATION

		B7		1	24	VCC
		B6		2	23	A7
		B5		3	22	A6
		B4		4	21	A5
		B3		5	20	A4
		B2		6	19	A3
		B1		7	18	A2
		B0		8	17	A1
				9	16	A0
	OEAB
		CPAB		10	15
						OEBA
				11	14	CPBA
		CEAB
		GND		12	13
						CEBA
					SA00114

PIN DESCRIPTION

	PIN	SYMBOL					NAME AND FUNCTION
	NUMBER
	10, 14		CPAB /				Clock input A to B / Clock input B to A
				CPBA
					/		Clock enable input A to B / Clock
	11, 13		CEAB
				CEBA			enable input B to A
	16, 17, 18,
	19, 20, 21,	A0 ± A7					Data inputs/outputs (A side)
	22, 23
	1, 2, 3, 4, 5,	B0 ± B7					Data outputs/outputs (B side)
	6, 7, 8
						/
	9, 15		OEAB				Output enable inputs
				OEBA
	12			GND			Ground (0V)
	24			VCC			Positive supply voltage

1998 Feb 11

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853-1554 18949

Philips Semiconductors	Product specification
Octal registered transceiver (3-State)	74ABT2952

LOGIC SYMBOL

	16	17	18	19	20	21	22	23
	A0	A1	A2	A3	A4	A5	A6	A7
10	CPAB
11	CEAB						OEBA		15
14	CPBA						OEAB		9
13	CEBA
	B0	B1	B2	B3	B4	B5	B6	B7
	8	7	6	5	4	3	2	1
									SA00115

LOGIC SYMBOL (IEEE/IEC)

11	EN1
13	EN2
15	EN3

9EN4

10C5

14	C6
16	2, 3, 6	1, 4, 5	8
17			7
18			6
19			5
20			4
21			3
22			2
23			1

FUNCTION TABLE for Register An or Bn

	INPUTS					INTERNAL	OPERATING
						Q	MODE
An or Bn		CPXX		CEXX
X		X		H		NC	Hold data
L		↑		L		L	Load data
H		↑		L		H

H = High voltage level L = Low voltage level

↑ = Low±to±High transition X = Don't care

XX = AB or BA NC= No change

FUNCTION TABLE for Output Enable

	INPUTS				INTERNAL	An or Bn	OPERATING
					Q	OUTPUTS	MODE
		OEXX
		H			X	Z	Disable outputs
		L			L	L	Enable outputs
		L			H	H
H	= High voltage level
L	= Low voltage level
X	= Don't care
XX = AB or BA
Z	= High impedance ªoff º state

SA00116

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
V	DC input voltage3		±1.2 to +7.0	V
I
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.

1998 Feb 11

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Philips Semiconductors	Product specification
Octal registered transceiver (3-State)	74ABT2952

LOGIC DIAGRAM

CEAB	11
CPAB	10
OEAB	9
				DETAIL A
	CE	Q
	16
A0
	D
	CP
			Q	CE
				8
				D	B0
				CP
A1	17			7	B1
A2	18			6	B2
A3	19			5	B3
A4	20	DETAIL A X 7		4	B4
A5	21			3	B5
A6	22			2	B6
A7	23			1	B7
CEBA	13
CPBA	14
OEBA	15
				SA00117

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			64	mA
t/ v	Input transition rise or fall rate	0		10	ns/V
Tamb	Operating free-air temperature range	±40		+85	°C

1998 Feb 11

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