Philips N74F640N, N74F640D Datasheet

INTEGRATED CIRCUITS

74F640

Octal bus transceiver, inverting (3-State)

Product specification
IC15 Data Handbook

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1989 Nov 27

Philips Semiconductors Product specification

74F640Octal bus transceiver, inverting (3-State)

FEA TURES

•High-impedance NPN base inputs for reduced loading

(70µA in High and Low states)

•Ideal for applications which require high-output drive and minimal

bus loading

•Inverting version of 74F245

•Octal bidirectional bus interface

•3-State outputs sink 64mA and source 15mA

DESCRIPTION

The 74F640 is an octal transceiver featuring inverting 3-State bus
compatible outputs in both transmit and receive directions. The B
port outputs are capable of sinking 64mA and sourcing 15mA,
providing very good capacitive drive characteristics. The device
features an Output Enable (OE
Transmit/Receiver (T/R
outputs, B0–B7, have been designed to prevent output bus loading if
the power is removed from the device.

) input for easy cascading and

) input for direction control. The 3-State

PIN CONFIGURATION

1

T/R

2

A0

3

A1

4

A2

5

A3

6

A4

7

A5

8

A6

9

A7

10 11

GND

TYPE

TYPICAL

PROPAGATION

TYPICAL SUPPLY CURRENT

DELAY

74F640 3.5ns 78mA

20
19
18
17
16
15
14
13
12

SF00198

V

CC

OE
B0
B1
B2
B3
B4
B5
B6

B7

(TOTAL)

ORDERING INFORMATION

COMMERCIAL RANGE

DESCRIPTION

20-pin plastic DIP N74F640N SOT146-1

20-pin plastic SOL N74F640D SOT163-1

VCC = 5V ±10%,

T

= 0°C to +70°C

amb

PKG DWG #

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS DESCRIPTION

74F(U.L.)

HIGH/LOW

A0 - A7, B0 - B7 Data inputs 3.5/0.1 15 70µA/70µA
OE Output Enable input (active Low) 2.0/0.067 40µA/40µA
T/R Transmit/Receive input 2.0/0.067 40µA/40µA
A0 - A7 A port outputs 150/40 3.0mA/24mA
B0 - B7 B port outputs 750/106.7 15mA/64mA

NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.

LOAD VALUE

HIGH/LOW

1989 Nov 27 853–0381 98171

2

Philips Semiconductors Product specification

OUTPUTS

74F640Octal bus transceiver, inverting (3-State)

LOGIC SYMBOL

456

A2 A3

A4 A5 A67A7

B4 B5 B6 B7

19

1

VCC= Pin 20
GND = Pin 10

23

A0 A1

OE
T/R

B0 B1 B2 B3

18 17 16 15 14 13 12 11

FUNCTION TABLE

INPUTS

OE T/R

L L Bus B data to Bus A
L H Bus A data to Bus B

H X Z

H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state

89

SF01140

LOGIC SYMBOL (IEEE/IEC)

19

1

2
3

4

5

6

7

8

9

G3
3EN1(BA)
3EN2(AB)

1

2

18
17

16

15

14

13

12

11

SF01141

LOGIC DIAGRAM

19

OE

1

T/R

VCC= Pin 20
GND = Pin 10

1989 Nov 27

A0 A1 A4 A5 A6 A7

23 4

18 17 16 15 14 13 12

B0 B1 B4 B5 B6 B7

B2 B3

A3A2

5678119

3

SF01142

Philips Semiconductors Product specification

I

Current applied to output in Low output state

SYMBOL

PARAMETER

UNIT

IOHHigh-level output current

IOLLow-level output current

74F640Octal bus transceiver, inverting (3-State)

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)

SYMBOL

V
V
I

IN

V

OUT

T
T

CC
IN

OUT

amb
stg

Supply voltage –0.5 to +7.0 V
Input voltage –0.5 to +7.0 V
Input current –30 to +5 mA
Voltage applied to output in High output state –0.5 to +V

pp

p

Operating free-air temperature range 0 to +70 °C
Storage temperature range –65 to +150 °C

RECOMMENDED OPERATING CONDITIONS

V
V
V
I

T

CC
IH
IL

IK

amb

Supply voltage 4.5 5.0 5.5 V
High-level input voltage 2.0 V
Low-level input voltage 0.8 V
Input clamp current –18 mA

p

p

Operating free-air temperature range 0 70 °C

PARAMETER RATING UNIT

CC

p

A0–A7 48 mA
B0–B7 128 mA

LIMITS

MIN NOM MAX

A0–A7 –3 mA
B0–B7 –15 mA
A0–A7 24 mA
B0–B7 64 mA

V

1989 Nov 27

4