Motorola MC74F2245DW, MC74F2245SD Datasheet



SEMICONDUCTOR TECHNICAL DATA

 Motorola, Inc. 1996

1

2/96

REV 0

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!   ! ! 

The MC74F2245 is designed for asynchronous communication
between data buses. The device transmits data from the A bus to the B
bus or from the B bus to the A bus depending upon the logic level at the
direction control (DIR) input. The output enable (OE

) input disables the

device so the buses are effectively isolated.

Both A and B outputs can sink up to 12mA; 25Ω resistors are included
in the lower output circuit to reduce overshoot and undershoot.

The MC74F2245 is characterized for operation from 0°C to 70°C.

• 3–State Outputs Drive Bus Lines or Buffer Memory Address Registers

• Package Options Include Plastic SOIC (DW–Suffix) and Plastic SSOP

(SD–Suffix)

111213141516171819

V

CC

1 2 3 4 5 6 7

20

OE B0B

1

B

2

B

4

B

3

A

1

T/R

A

0

A

2

A

3

A

5

A

4

CONNECTION DIAGRAM (TOP VIEW)

8 9 10

B

5

B

7

B

6

A

6

GNDA

7

GUARANTEED OPERATING RANGES

Symbol Parameter Min Typ Max Unit

V

CC

Supply Voltage 4.5 5.0 5.5 V

T

A

Operating Ambient Temperature Range 0 25 70 °C

I

OH

Output Current — High Outputs –3.0 mA

I

OL

Output Current — Low Outputs 12 mA



25Ω OCTAL BIDIRECTIONAL

TRANSCEIVER WITH 3–STATE

INPUTS AND OUTPUTS

FAST SCHOTTKY TTL

DW SUFFIX

PLASTIC SOIC
CASE 751D–04

SD SUFFIX*

PLASTIC SSOP

CASE 940C–03

*Thermal Mounting Techniques are

Recommended. Please refer to Motorola

Application Note AN1567/D.

MC74F2245

MOTOROLA TIMING SOLUTIONS

BR1333 — REV 5

2

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits

Symbol Parameter Min Typ Max Unit Test Conditions

V

IH

Input HIGH Voltage 2.0 V Guaranteed Input HIGH Voltage

V

IL

Input LOW Voltage 0.8 V Guaranteed Input LOW Voltage

V

IK

Input Clamp Diode Voltage –1.2 V IIN = –18 mA VCC = MIN

V

OH

Output HIGH Voltage, Outputs 2.5 V IOH = –1.0 mA VCC = 4.50 V

2.4 3.0 V IOH = –3.0 mA VCC = 4.50 V

2.7 3.2 V IOH = –3.0 mA VCC = 4.75 V

V

OL

Output LOW Voltage, Outputs 0.2 0.5 V IOL = 1 mA VCC = MIN

V

OL

Output LOW Voltage, Outputs 0.5 0.75 V IOL = 12 mA VCC = MIN

I

OZH

+ IIHOutput Off Current HIGH 70 µA V

OUT

= 2.7 V VCC = MAX

I

OZL

+ I

IL

Output Off Current LOW –650 mA V

OUT

= 0.5 V VCC = MAX

OE, T/R Inputs 20 µA VIN = 2.7 V

I

IH

Input HIGH Current OE, T/R Inputs 100 µA VIN = 7.0 V VCC = MAX

An, Bn Inputs 1.0 mA VIN = 5.5 V
T/R Input –0.8 mA

I

IL

Input LOW Current OE Input –1.2 mA VIN = 0.5 V VCC = MAX

I

OS

Output Short Circuit An Outputs –60 –150 mA V

OUT

= GND VCC = MAX

Current (Note 2) Bn Outputs –100 –225 mA V

OUT

= GND VCC = MAX

I

CCH

Power Supply Current HIGH 90 mA VCC = MAX, Outputs HIGH

I

CCL

Power Supply Current LOW 120 mA VCC = MAX, Outputs LOW

I

CCZ

Power Supply Current OFF 110 mA VCC = MAX, Outputs OFF

NOTES:

1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.

2. Not more than one output should be shorted at a time.

AC CHARACTERISTICS

TA = +25°C TA = 0°C to +70°C

VCC = +5.0 V VCC = 5.0 V ± 10%

CL = 50 pF CL = 50 pF

Symbol Parameter Min Max Min Max Unit

t

PLH

t

PHL

Propagation Delay
An to Bn or Bn to A

n

2.5

2.5

6.0

6.6

2.5

2.5

7.0

7.1

ns

t

PZH

t

PZL

Output Enable Time 3.0

3.5

7.3

10.6

3.0

3.5

8.5

12.0

ns

t

PHZ

t

PLZ

Output Disable Time 2.5

2.0

6.5

6.5

2.5

2.0

7.5

7.5

ns