74CBTLVD3244

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© NXP B.V. 2011. All rights reserved.

Product data sheet

Rev. 2 — 16 December 2011

4 of 20

NXP Semiconductors

74CBTLVD3244

8-bit level-shifting bus switch with 4-bit output enables

5.2 Pin description

6.

Functional description

[1]

H = HIGH voltage level; L = LOW voltage level; Z = high-impedance OFF-state.

(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 5.

Pin configuration for DHVQFN20 (SOT764-1)

2OE

1B1

2A4

1B2

2A3

1B3

2A2

1B4

Transparent top view

terminal 1

index area

74CBTLVD3244

19

18

17

16

15

14

13

12

9

8

7

6

5

4

3

2

1A1

2B4

1A2

2B3

1A3

2B2

1A4

2B1

aaa-000027

Table 2.

Pin description

Symbol

Pin

Description

1OE, 2OE

1, 19

output enable input (active LOW)

1A1 to 1A4

2, 4, 6, 8

data input/output (A port)

2B1 to 2B4

9, 7, 5, 3

data input/output (A port)

GND

10

ground (0 V)

2A1 to 2A4

11, 13, 15, 17

data input/output (B port)

1B1 to 1B4

18, 16, 14, 12

data input/output (B port)

20

positive supply voltage

Table 3.

Function selection[1]

Input

Input/output

nOE

nAn, nBn

LnAn = nBn

HZ