SLS SL74HCT245D, SL74HCT245N Datasheet

SL74HCT245

Semiconductor

Octal 3-State Noninverting Bus Transceiver

High-Performance Silicon-Gate CMOS

The SL74HCT245 is identical in pinout to the LS/ALS245.This
device may be used as a level converter for interfacing TTL or NMOS
outputs to High Speed CMOS inputs.

The SL74HCT245 is a 3-state noninverting transceiver that is used
for 2-way asynchronous communication between data buses. The
device has an active-low Output Enable pin, which is used to place the
I/O ports into high-impedance states. The Direction control determines
whether data flows from A to B or from B to A.

• TTL/NMOS Compatible Input Levels

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 4.5 to 5.5 V

• Low Input Current: 1.0 µA

ORDERING INFORMATION

SL74HCT245N Plastic

SL74HCT245D SOIC

TA = -55° to 125° C for all packages

LOGIC DIAGRAM

PIN 20=VCC

PIN 10 = GND

PIN ASSIGNMENT

FUNCTION TABLE

Control Inputs

Output

Enable

L L Data Transmitted

Direction Operation

from Bus B to Bus
A

L H Data Transmitted

from Bus A to Bus
B

H X Buses Isolated

(High Impedance
State)

X = don’t care

System Logic

SLS

SL74HCT245

Semiconductor

MAXIMUM RATINGS*

Symbol Parameter Value Unit

VCC DC Supply Voltage (Referenced to GND) -0.5 to +7.0 V
VIN DC Input Voltage (Referenced to GND) -1.5 to VCC +1.5 V

V

DC Output Voltage (Referenced to GND) -0.5 to VCC +0.5 V

OUT

IIN DC Input Current, per Pin ±20 mA

I

DC Output Current, per Pin ±35 mA

OUT

ICC DC Supply Current, VCC and GND Pins ±75 mA
PD Power Dissipation in Still Air, Plastic DIP+

SOIC Package+

750
500

Tstg Storage Temperature -65 to +150 °C

TL Lead Temperature, 1 mm from Case for 10 Seconds

260 °C

(Plastic DIP or SOIC Package)

*

Maximum Ratings are those values beyond which damage to the device may occur.

Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C

SOIC Package: : - 7 mW/°C from 65° to 125°C

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Min Max Unit

VCC DC Suppl y Voltage (Referenced to GND) 4.5 5.5 V

VIN, V

DC Input Voltage, Output Voltage (Referenced to GND) 0 VCC V

OUT

TA Operating Temperature, All Package Types -55 +125 °C

tr, tf Input Rise and Fall Time (Figure 1) 0 500 ns

mW

This device contains protection circuitry to guard against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, VIN and V
GND≤(VIN or V

OUT

)≤VCC.

should be constrained to the range

OUT

Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC).
Unused outputs must be left open.

System Logic

SLS