Fairchild Semiconductor 74ACTQ16245CW, 74ACTQ16245SSCX, 74ACTQ16245SSC, 74ACTQ16245MTD Datasheet

© 1999 Fairchild Semiconductor Corporation DS010926 www.fairchildsemi.com

May 1991
Revised November 1999

74ACTQ16245 16-Bit Transceiver with 3-STATE Outputs

74ACTQ16245
16-Bit Transceiver with 3-STATE Outputs

General Description

The ACTQ16245 contains sixteen non-inverting bidirec­tional buffers with 3-STATE outputs and is intended for bus
oriented applications. The device is byte control led. Each
has separate control input s which can be shorted tog ether
for full 16-bit operation. The T/R

inputs determine the direc-

tion of data flow throu gh t he d evice . T he O E

inputs disable
both the A and B ports by placing them in a high i mped­ance state.

The ACTQ16245 utilizes Fairchild Quiet Series technol­ogy to guarantee quiet output switching and improved
dynamic threshold perf ormance. FACT Quiet Series fe a­tures GTO output control for superior performance.

Features

■ Utilizes Fairchild FACT Quiet Series technology

■ Guaranteed simultaneou s switching nois e level and

dynamic threshold performan ce

■ Guaranteed pin-to-pin output skew

■ Bidirectional non-inverting buffers

■ Separate control logic for each byte

■ 16-bit version of the ACTQ245

■ Outputs source/sink 24 mA

■ Additional specs for multiple output switching

■ Output loading specs for both 50 pF and 250 pF loads

Ordering Code:

Device also available in Tape and Reel. Specify by appending s uffix let te r “X” to the ordering code.

Logic Symbol

Pin Description

Connection Diagram

FACT, FACT Quiet Series and GTO are trademarks of Fairchild Semiconductor Corporation.

Order Number Package Number Package Description

74ACTQ16245SSC MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300” Wide
74ACTQ16245MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Pin Names Description

OE

n

Output Enable Input (Active LOW)

T/R

Transmit/Receive Input

A

0–A15

Side A Inputs/Outputs

B

0–B15

Side B Outputs/Inputs

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74ACTQ16245

Functional Description

The ACTQ16245 contains sixteen non-inverting bidirec­tional buffers with 3-STATE outputs. The device is byte
controlled with each byte functioning identically, but inde­pendent of the other. The control pins can be shorted
together to obtain full 16-bit operation. The following
description applies to each byte. When the T/R

input is
HIGH, then Bus A data is tr ansmitted to Bus B. When the
T/R

input is LOW, Bus B data is transmitted to B us A. The

3-STATE outputs are controlled by an Output Enable (OE

n

)

input for each byte. When OE

n

is LOW, the outputs are in

2-state mode. When OE

n

is HIGH, the outputs are in th e

high impedance mode, but this does not interfere with
entering new data into the inputs.

Tr uth Tables

H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance

Logic Diagram

Inputs

Outputs

OE

1

T/R

1

LLBus B

0–B7

Data to Bus A0–A

7

LHBus A

0–A7

Data to Bus B0–B

7

H X HIGH-Z State on A0–A7, B0–B

7

Inputs

Outputs

OE

2

T/R

2

L L Bus B8–B15 Data to Bus A8–A

15

L H Bus A8–A15 Data to Bus B8–B

15

H X HIGH-Z State on A8–A15, B8–B

15

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74ACTQ16245

Absolute Maximum Ratings(Note 1) Recommended Operating

Conditions

Note 1: Absolute max imum ratings are t hose values bey ond which damage

to the device may occu r. The databook spe cificatio ns shou ld be met, wit h­out exception to ensure that the system design is reliable over its power
supply, temperature, and output/input loading variables. Fairchild does not
recommend operation of FACT circuits outside da t abook specifications.

DC Electrical Characteristics

Note 2: All outputs loaded; thresholds associated with output under test.
Note 3: Maximum test duration 2.0 ms; one output loaded at a time.
Note 4: Worst case package.
Note 5: Maximum number of outputs that can switch simultaneously is n. (n − 1) outpu t s are switched LOW and one out put held LOW.
Note 6: Maximum number of outputs that can switch simultaneously is n. (n − 1) outpu t s are switched HIGH and one output held HIGH.
Note 7: Max number of data input s (n ) s w it c hing. (n − 1) input switching 0V to 3V input under test switching 3V to threshold (V

ILD

)

Supply Voltage (VCC) −0.5V to + 7.0V
DC Input Diode Current (I

IK

)

V

I

= −0.5V −20 mA

V

I

= VCC + 0.5V +20 mA

DC Output Diode Current (I

OK

)

V

O

= −0.5V −20 mA

V

O

= VCC +0.5V +20 mA

DC Output Voltage (V

O

) −0.5V to VCC +0.5V

DC Output Source/Sink Current (I

O

) ± 50 mA

DC V

CC

or Ground Current

per Output Pin ± 50 mA

Storage Temperature −65°C to +150°C

Supply Voltage (V

CC

) 4.5V to 5.5V

Input Voltage (V

I

)0V to V

CC

Output Voltage (VO)0V to V

CC

Operating Temperature (TA) −40°C to +85°C
Minimum Input Edge Rate (∆V/∆t) 125 mV/ns

V

IN

from 0.8V to 2.0V

V

CC

@ 4.5V, 5.5V

Symbol Parameter

V

CC

TA = +25°CTA = −40°C to+85°C

Units Conditions

(V) Typ Guaranteed Limits

V

IH

Minimum HIGH 4.5 1.5 2.0 2.0

V

V

OUT

= 0.1V

Input Voltage 5.5 1.5 2.0 2.0 or VCC − 0.1V

V

IL

Maximum LOW 4.5 1.5 0.8 0.8

V

V

OUT

= 0.1V

Input Voltage 5.5 1.5 0.8 0.8 or VCC − 0.1V

V

OH

Minimum HIGH 4.5 4.49 4.4 4.4

VI

OUT

= −50 µA

Output Voltage 5.5 5.49 5.4 5.4

VIN = VIL or V

IH

4.5 3.86 3.76 V IOH = −24 mA

5.5 4.86 4.76 IOH = −24 mA (Note 2)

V

OL

Maximum LOW 4.5 0.001 0.1 0.1

VI

OUT

= 50 µA

Output Voltage 5.5 0.001 0.1 0.1

VIN = VIL or V

IH

4.5 0.36 0.44 V IOL = 24 mA

5.5 0.36 0.44 I

OL

= 24 mA (Note 2)

I

OZT

Maximum I/O

5.5 ±0.5 ±5.0 µA

VI = VIL, V

IH

Leakage Current VO = VCC, GND

I

IN

Maximum Input Leakage Current 5.5 ±0.1 ±1.0 µAVI = VCC, GND

I

CCT

Maximum ICC/Input 5.5 0.6 1.5 mA VI = VCC −2.1V

I

CC

Max Quiescent Supply Current 5.5 8.0 80.0 µAVIN = VCC or GND

I

OLD

Minimum Dynamic 5.5 75 mA V

OLD

= 1.65V Max

I

OHD

Output Current (Note3) 5.5 −75 mA V

OHD

= 3.85V Min

V

OLP

Quiet Output

5.0 0.5 0.8 V

Figure 1, Figure 2

Maximum Dynamic V

OL

(Note 5)(Note 6)

V

OLV

Quiet Output

5.0 −0.5 −0.85 V

Figure 1, Figure 2

Minimum Dynamic V

OL

(Note 5)(Note 6)

V

OHP

Maximum

5.0 VOH + 1.0 VOH + 1.5 V

Figure 1, Figure 2

Overshoot (Note 4)(Note 6)

V

OHV

Minimum

5.0 VOH − 1.0 VOH − 1.8 V

Figure 1, Figure 2

VCC Droop (Note 4)(Note 6)

V

IHD

Minimum HIGH Dynamic Input Voltage Level 5.0 1.7 2.0 V (Note 4)(Note 7)

V

ILD

Maximum LOW Dynamic Input Voltage Level 5.0 1.2 0.8 V (Note 4)(Note 7)