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

INTEGRATED CIRCUITS

74ABT2245

Octal transceiver with direction pin with
30Ω series termination resistors (3-State)

Product specification
Supersedes data of 1996 Sep 10

IC23 Data Handbook

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1998 Jan 16

Philips Semiconductors Product specification

Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)

FEA TURES

•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

QUICK REFERENCE DATA

SYMBOL PARAMETER

t

PLH

t

PHL

C
C
I

CCZ

IN

I/O

Propagation delay
An to Bn or Bn to An

CL = 50pF; VCC = 5V 3.9 ns

Input capacitance DIR, OE VI = 0V or V
I/O pin capacitance Outputs disabled; VO = 0V or V
Total supply current Outputs disabled; VCC =5.5V 50 µA

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.

CONDITIONS

T

= 25°C; GND = 0V

amb

CC

CC

74ABT2245

TYPICAL UNIT

4 pF
7 pF

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

1

DIR

2

A0

3

A1

4

A2

5

A3

6

A4

7

A5

8

A6

9

A7

10 11

GND

20
19
18
17
16
15
14
13
12

SA00121

V
OE
B0
B1
B2
B3
B4
B5
B6
B7

CC

PIN DESCRIPTION

PIN NUMBER SYMBOL NAME AND FUNCTION

1 DIR Direction control input

2, 3, 4, 5, 6, 7, 8, 9 A0 – A7 Data inputs/outputs (A side)

18, 17, 16, 15, 14,

13, 12, 11

19 OE

10 GND Ground (0V)
20 V

B0 – B7 Data inputs/outputs (B side)

Output enable input
(active-Low)

CC

Positive supply voltage

1998 Jan 16 853-1761 18865

2

Philips Semiconductors Product specification

Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)

LOGIC SYMBOL

1

DIR

A0

A1

A2

A3

A4

A5

A6

A7

2

3

4

5

6

7

8

9

19

OE

18

B0

17

B1

16

B2

15

B3

14

B4

13

B5

12

B6

11

B7

SA00122

74ABT2245

FUNCTION TABLE

INPUTS INPUTS/OUTPUTS

OE DIR An Bn

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 ”off” state

SCHEMATIC OF EACH OUTPUT

V

CC

LOGIC SYMBOL IEEE/IEC

19

1

2

3

4

5

6

7

8

9

G3

3 EN1 (BA)

3 EN2 (AB)

1

OUTPUT

SA00237

2

18

17

16

15

14

13

12

11

SA00313

1998 Jan 16

3

Philips Semiconductors Product specification

Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)

ABSOLUTE MAXIMUM RATINGS

SYMBOL

V

V

I

CC

I

IK

V

I

OK

OUT

OUT

T

stg

DC supply voltage –0.5 to +7.0 V
DC input diode current VI < 0 –18 mA
DC input voltage

I

DC output diode current VO < 0 –50 mA
DC output voltage
DC output current output in Low state 128 mA
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 “recommended operating conditions” 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.

PARAMETER CONDITIONS RATING UNIT

3

3

RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER LIMITS UNIT

V

CC

V
V
V
I

OH

I

OL

∆t/∆v Input transition rise or fall rate 0 5 ns/V

T

amb

DC supply voltage 4.5 5.5 V
Input voltage 0 V

I

High-level input voltage 2.0 V

IH

Low-level Input voltage 0.8 V

IL

High-level output current –32 mA
Low-level output current 12 mA

Operating free-air temperature range –40 +85 °C

1, 2

–1.2 to +7.0 V

output in Off or High state –0.5 to +5.5 V

Min Max

74ABT2245

CC

V

1998 Jan 16

4