Philips 74ABT2953PW, 74ABT2953DB, 74ABT2953D Datasheet

Philips Semiconductors	Product specification
Octal registered transceiver, inverting (3-State)	74ABT2953

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

•Live insertion/extraction permitted

•Power-up 3-State

•Power-up reset

DESCRIPTION

The 74ABT2953 high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive.

The 74ABT2953 device is an 8-bit registered inverting 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					CL = 50pF; VCC = 5V	5.0	ns
	tPHL	CPBA to An or CPAB to Bn
	CIN	Input capacitance					VI = 0V or VCC	4	pF
	CI/O	I/O capacitance					Outputs disabled;	7	pF
							VO = 0V or VCC
	ICCZ	Total supply current					Outputs disabled; VCC =5.5V	500	nA

ORDERING INFORMATION

PACKAGES	TEMPERATURE RANGE	OUTSIDE NORTH AMERICA	NORTH AMERICA	DWG NUMBER
24-Pin Plastic DIP	±40°C to +85°C	74ABT9253 N	74ABT2953 N	SOT222-1
24-Pin plastic SO	±40°C to +85°C	74ABT2953 D	74ABT2953 D	SOT137-1
24-Pin Plastic SSOP Type II	±40°C to +85°C	74ABT2953 DB	74ABT2953 DB	SOT340-1
24-Pin Plastic TSSOP Type I	±40°C to +85°C	74ABT2953 PW	74ABT2953PW DH	SOT355-1

PIN CONFIGURATION

PIN DESCRIPTION

PIN NUMBER

SYMBOL

NAME AND FUNCTION

10, 14

CPAB /

Clock input A to B / Clock input

B7

1

24

VCC

CPBA

B to A

B6

2

23

A7

11, 13

CEAB /

Clock enable input A to B / Clock

B5

3

22

A6

CEBA

enable input B to A

B4

A5

4

21

16, 17, 18, 19,

A0 ± A7

Data inputs/outputs (A side)

B3

5

20

A4

20, 21, 22, 23

B2

A3

6

19

1, 2, 3, 4, 5, 6,

B0 ± B7

Data outputs/outputs (B side)

7, 8

B1

7

18

A2

B0

A1

8

17

9, 15

OEAB

/

Output enable inputs

A0

OEBA

OEAB

9

16

CPAB

12

GND

Ground (0V)

10

15

OEBA

CEAB

11

14

CPBA

24

VCC

Positive supply voltage

GND

12

13

CEBA

TOP VIEW

SA00305

1995 Sep 06

1

853-1555 15702

Philips Semiconductors	Product specification
Octal registered transceiver, inverting (3-State)	74ABT2953

LOGIC SYMBOL

LOGIC SYMBOL (IEEE/IEC)

	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

SA00306

FUNCTION TABLE for Register An or Bn

		INPUTS				INTERNAL	OPERATING
	An or
		CPXX	CEXX			Q	MODE
	Bn
	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

11

EN1

13

EN2

15

EN3

9

EN4

10

C5

14

C6

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

								SA00307
FUNCTION TABLE for Output Enable
	INPUTS				INTERNAL		An or Bn	OPERATING
					Q		OUTPUTS	MODE
		OEXX
		H			X		Z	Disable outputs
		L			L		H	Enable outputs
		L			H		L
H	= High voltage level
L	= Low voltage level
X	= Don't care
XX = AB or BA
Z	= High impedance ºoffº 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
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.

1995 Sep 06

2