74HC_HCT240

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© NXP Semiconductors N.V. 2016. All rights reserved.

Product data sheet

Rev. 4 — 25 February 2016

3 of 17

NXP Semiconductors

74HC240; 74HCT240

Octal buffer/line driver; 3-state; inverting

5.

Pinning information

5.1 Pinning

5.2 Pin description

(1) This is not a supply pin. The substrate is attached to this

pad using conductive die attach material. There is no

electrical or mechanical requirement to solder this pad.

However, if it is soldered, the solder land should remain

floating or be connected to GND.

Fig 4.

Pin configuration SO20, (T)SSOP20

Fig 5.

Pin configuration DHVQFN20

Table 2.

Pin description

Symbol

Pin

Description

1OE, 2OE

1, 19

output enable input (active LOW)

1A0, 1A1, 1A2, 1A3

2, 4, 6, 8

data input

2Y0, 2Y1, 2Y2, 2Y3

3, 5, 7, 9

bus output

GND

10

ground (0 V)

2A0, 2A1, 2A2, 2A3

17, 15, 13, 11

data input

1Y0, 1Y1, 1Y2, 1Y3

18, 16, 14, 12

bus output

VCC

20

supply voltage