SN74HC244APWLE datasheet(11/32 Pages) TI1

11 / 32 page

1OE

1A1

1Y1

1A2

1Y1

1A3

1Y1

1A4

1Y4

2OE

2A1

1Y1

2A2

1Y1

2A3

1Y1

2A4

1Y4

SN54HC244, SN74HC244

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SCLS130E – DECEMBER 1982 – REVISED MAY 2016

Product Folder Links: SN54HC244 SN74HC244

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8 Detailed Description

8.1 Overview

The SNx4HC244 device is organized as two 4-bit buffers and line drivers with separate output-enable (OE)

inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs

are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE

should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-

sinking capability of the driver.

8.2 Functional Block Diagram

8.3 Feature Description

The SNx4HC244 has a wide operating voltage of 2 V to 6 V. Inputs accept voltage levels up to VCC. This device

has a low power consumption of ICC 80 µA (maximum). The SNx4HC244 device can drive ±6 mA at VCC of 5 V.

8.4 Device Functional Modes

Table 2 lists the functions of the SNx4HC244.

Table 2. Function Table

(Each Buffer or Driver)

INPUTS

OUTPUT

SN74HC244APWLE Datasheet(PDF) 11 Page - Texas Instruments