HIT HD74LVC16245A Datasheet

HD74LVC16245A

16-bit Bus Transceivers with 3-state Outputs

ADE-205-120B(Z)

3rd Edition

December 1996

Description

The HD74LVC16245A has sixteen two direction buffers, for the fittest at two direction bus lines with three
state outputs. A direction control input, DIR. When DIR is high, data flows from the A inputs to the B
outputs. When DIR is high, data flows from the B inputs to the A outputs. When enable inputs (G) is high,
disables both A and B ports by placing then in a high impedance. Low voltage and high speed operation is
suitable at the battery drive product (note type personal computer) and low power consumption extends the
life of a battery for long time operation.

Features

• VCC = 2.0 V to 5.5 V

• All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)

• All outputs V

• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)

• Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C)

• High output current ±24 mA (@VCC = 3.0 V to 5.5 V)

(Max.) = 5.5 V (@VCC = 0 V or output off state)

OUT

Function Table

Inputs

G DIR Operation

L L B data to A bus
L H A data to B bus
HXZ

H: High level
L: Low level
X: Immaterial
Z: High impedance

HD74LVC16245A

Pin Arrangement

1DIR

1B1
1B2

GND

1B3
1B4

V

CC

1B5
1B6

GND

1B7
1B8

2B1
2B2

GND

2B3
2B4
V

CC

2B5
2B6

GND

2B7
2B8

2DIR

10
11

12
13
14
15
16
17
18

19

20
21
22
23
24

1G

1
2

3
4
5

6
7

8

9

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25

1A1
1A2
GND
1A3
1A4

V

CC

1A5
1A6

GND
1A7

1A8
2A1

2A2
GND
2A3

2A4
V

CC

2A5
2A6

GND
2A7

2A8
2G

(Top view)

2

HD74LVC16245A

Absolute Maximum Ratings

Item Symbol Ratings Unit Conditions

Supply voltage V
Input diode current I
Input voltage V
Output diode current I

Input / Output voltage V

Output current I
VCC, GND current / pin ICC or I

CC

IK

I

OK

I/O

O

GND

Storage temperature Tstg –65 to +150 °C
Note: The absolute maximum ratings are values which must not individually be exceeded, and furthermore,

no two of which may be realized at the same time.

Recommended Operating Conditions

–0.5 to 6.0 V
–50 mA VI = –0.5 V
–0.5 to 6.0 V G, DIR
–50 mA VO = –0.5 V
50 mA VO = VCC+0.5 V
–0.5 to VCC +0.5 V Output "H" or "L"
–0.5 to 6.0 V Output "Z" or VCC:OFF
±50 mA
100 mA

Item Symbol Ratings Unit Conditions

Supply voltage V

CC

1.5 to 5.5 V Data retention

2.0 to 5.5 V At operation

Input / output voltage V

I

V

I/O

0 to 5.5 V G, DIR
0 to V

CC

V Output "H" or "L"

0 to 5.5 V Output "Z" or VCC:OFF
Operating temperature Ta –40 to 85 °C
Output current I

Input rise / fall time

*1

OH

I

OL

tr, t

f

–12 mA VCC = 2.7 V

*2

–24

mA VCC = 3.0 V to 5.5 V

12 mA VCC = 2.7 V

*2

24

mA VCC = 3.0 V to 5.5 V

10 ns/V
Notes: 1. This item guarantees maximum limit when one input switches.

Waveform : Refer to test circuit of switching characteristics.

2. duty cycle ≤ 50%

3