Philips 74ABT573AN, 74ABT573ADB, 74ABT573AD, 74ABT573APW Datasheet

Philips Semiconductors	Product specification
Octal D-type transparent latch (3-State)	74ABT573A

FEATURES

•74ABT573A is flow-through pinout version of 74ABT373

•Inputs and outputs on opposite side of package allow easy interface to microprocessors

•3-State output buffers

•Common output enable

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

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

•Power-up 3-State

•Power-up reset

DESCRIPTION

The 74ABT573A high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive.

The 74ABT573A device is an octal transparent latch coupled to eight 3-State output buffers. The two sections of the device are controlled independently by Enable (E) and Output Enable (OE) control gates. The 74ABT573A is functionally identical to the 74ABT373 but has a flow-through pinout configuration to facilitate PC board layout and allow easy interface with microprocessors.

The data on the D inputs are transferred to the latch outputs when the Latch Enable (E) input is High. The latch remains transparent to the data inputs while E is High, and stores the data that is present one setup time before the High-to-Low enable transition.

The 3-State output buffers are designed to drive heavily loaded 3-State buses, MOS memories, or MOS microprocessors. The active-Low Output Enable (OE) controls all eight 3-State buffers independent of the latch operation.

When OE is Low, the latched or transparent data appears at the outputs. When OE is High, the outputs are in the High-impedance

ºOFFº state, which means they will neither drive nor load the bus.

QUICK REFERENCE DATA

	SYMBOL	PARAMETER	CONDITIONS	TYPICAL	UNIT
			Tamb = 25°C; GND = 0V
	tPLH	Propagation delay	CL = 50pF; VCC = 5V	2.8	ns
	tPHL	Dn to Qn		3.3
	CIN	Input capacitance	VI = 0V or VCC	3	pF
	COUT	Output capacitance	Outputs disabled; VO = 0V or VCC	6	pF
	ICCZ	Total supply current	Outputs disabled; VCC =5.5V	100	μA

ORDERING INFORMATION

PACKAGES	TEMPERATURE RANGE	OUTSIDE NORTH AMERICA	NORTH AMERICA	DWG NUMBER
20-Pin Plastic DIP	±40°C to +85°C	74ABT573A N	74ABT573A N	SOT146-1
20-Pin plastic SO	±40°C to +85°C	74ABT573A D	74ABT573A D	SOT163-1
20-Pin Plastic SSOP Type II	±40°C to +85°C	74ABT573A DB	74ABT573A DB	SOT339-1
20-Pin Plastic TSSOP Type I	±40°C to +85°C	74ABT573A PW	74ABT573APW DH	SOT360-1

PIN CONFIGURATION											PIN DESCRIPTION
											PIN	SYMBOL			FUNCTION
											NUMBER
											1				Output enable input (active-Low)
													OE
	OE		1				20	VCC			2, 3, 4, 5,	D0-D7			Data inputs
											6, 7, 8, 9
	D0		2				19	Q0
											19, 18, 17,
	D1		3				18	Q1
											16, 15, 14,	Q0-Q7			Data outputs
	D2		4				17	Q2			13, 12
											11		E		Enable input (active-High)
	D3		5				16	Q3
	D4										10	GND			Ground (0V)
			6				15	Q4
	D5										20	VCC			Positive supply voltage
			7				14	Q5
	D6
			8				13	Q6
	D7
			9				12	Q7
GND
			10				11	E
									SA00185

1995 Sep 06

1

853±1455 15703

Philips Semiconductors	Product specification
Octal D-type transparent latch (3-State)	74ABT573A

LOGIC SYMBOL (IEEE/IEC)

LOGIC SYMBOL

1

EN

11

2

3

4

5

6

7

8

9

C1

19

2

2D

1

D0

D1

D2

D3

D4

D5

D6

D7

3

18

11

E

4

17

1

OE

5

16

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

6

15

7

14

19

18

17

16

15

14

13

12

8

13

9

12

SA00187

SA00186

FUNCTION TABLE

INPUTS

INTERNAL

OUTPUTS

OPERATING MODE

E

Dn

REGISTER

Q0 ± Q7

OE

L

H

L

L

L

Enable and read register

L

H

H

H

H

L

↓

l

L

L

Latch and read register

L

↓

h

H

H

L

L

X

NC

NC

Hold

H

L

X

NC

Z

Disable outputs

H

H

Dn

Dn

Z

H

=

High voltage level

h

=

High voltage level one set-up time prior to the High-to-Low E transition

L

=

Low voltage level

l

=

Low voltage level one set-up time prior to the High-to-Low E transition

NC=

No change

X

=

Don't care

Z

=

High impedance ªoffº state

↓ =

High-to-Low E transition

LOGIC DIAGRAM

D0	D1	D2	D3	D4	D5	D6		D7
2	3	4	5	6	7	8		9
D	D	D	D	D	D	D		D
E Q	E Q	E Q	E Q	E Q	E Q	E Q		E Q
11
E
1
OE
	19	18	17	16	15	14	13	12
	Q0	Q1	Q2	Q3	Q4	Q5	Q6	Q7
								SA00188
1995 Sep 06			2