SLS SL74HCT373D, SL74HCT373N Datasheet

SL74HCT373

Semiconductor

Octal 3-State Noninverting Transparent Latch

High-Performance Silicon-Gate CMOS

The SL74HCT373 may be used as a level converter for interfacing

TTL or NMOS outputs to High-Speed CMOS inputs.

The SL74HCT373 is identical in pinout to the LS/ALS373.

The eight latches of the SL74HCT373 are transparent D-type
latches. While the Latch Enable is high the Q outputs follow the Data
Inputs. When Latch Enable is taken low, data meeting the setup and
hold times becomes latched.

The Output Enable does not affect the state of the latch, but when
Output Enable is high, all outputs are forced to the high-impedance
state. Thus, data may be latched even when the outputs are not
enabled.

• 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

SL74HCT373N Plastic

SL74HCT373D SOIC

TA = -55° to 125° C for all packages

LOGIC DIAGRAM

PIN 20=VCC

PIN 10 = GND

PIN ASSIGNMENT

FUNCTION TABLE

Inputs Output

Output

Enable

L H H H
L H L L
L L X No Change

H X X Z

Latch

Enable

D Q

SLS

X = Don’t Care
Z = High Impedance

System Logic

SL74HCT373

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 Supply 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