HIT HD74ALVCH16827 Datasheet

HD74ALVCH16827

20-bit Buffers / Drivers with 3-state Outputs

ADE-205-140B (Z)

3rd. Edition

December 1999

Description

The HD74ALVCH16827 is composed of two 10-bit sections with separated output enable signals. For
either 10-bit buffer section, the two output enable (1OE1 and 1OE2 or 2OE1 and 2OE2) inputs must both
be low for the corresponding Y outputs to be active. If either output enable input is high, the outputs of that
10-bit buffer section are in the high impedance state. Active bus hold circuitry is provided to hold unused
or floating data inputs at a valid logic level.

Features

• VCC = 2.3 V to 3.6 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)

• Bus hold on data inputs eliminates the need for external pullup / pulldown resistors

Function Table

Inputs Output Y
OE1 OE2 A

LLLL
LLHH
HXXZ
XHXZ

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

HD74ALVCH16827

Pin Arrangement

1OE1

1Y1
1Y2

GND

1Y3
1Y4

V

CC

1Y5
1Y6

1Y7

GND

1Y8
1Y9

1Y10

2Y1
2Y2
2Y3

GND

2Y4
2Y5
2Y6
V

CC

2Y7
2Y8

GND

2Y9

2Y10

2OE1

10
11

12
13
14

15
16

17
18

19

20
21
22
23
24
25
26
27
28

1OE2

1
2

3
4
5

6
7

8

9

56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29

1A1
1A2
GND
1A3
1A4

V

CC

1A5
1A6

1A7
GND

1A8
1A9

1A10
2A1
2A2

2A3
GND
2A4
2A5
2A6
V

CC

2A7
2A8
GND
2A9
2A10
2OE2

(Top view)

2

HD74ALVCH16827

Absolute Maximum Ratings

Item Symbol Ratings Unit Conditions

Supply voltage V
Input voltage
Output voltage

*1

*1, 2

Input clamp current I
Output clamp current I
Continuous output current I
VCC, GND current / pin ICC or I
Maximum power dissipation

at Ta = 55°C (in still air)

*3

CC

V

I

V

O

IK

OK

O

GND

P

T

Storage temperature Tstg –65 to 150 °C
Notes: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage

to the device. These are stress ratings only, and functional operation of the device at these or
any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute maximum rated conditions for extended periods may affect device
reliability.

1. The input and output negative voltage ratings may be exceeded if the input and output clamp
current ratings are observed.

2. This value is limited to 4.6 V maximum.

3. The maximum package power dissipation is calculated using a junction temperature of 150°C
and a board trace length of 750 mils.

–0.5 to 4.6 V
–0.5 to 4.6 V
–0.5 to VCC +0.5 V
–50 mA VI < 0

±50 mA VO < 0 or VO > V
±50 mA VO = 0 to V

CC

±100 mA
1 W TSSOP

CC

Recommended Operating Conditions

Item Symbol Min Max Unit Conditions

Supply voltage V
Input voltage V
Output voltage V
High level output current I

Low level output current I

CC

I

O

OH

OL

Input transition rise or fall rate ∆t / ∆v 0 10 ns / V
Operating temperature Ta –40 85 °C

Note: Unused control inputs must be held high or low to prevent them from floating.

2.3 3.6 V
0VCCV
0VCCV
— –12 mA VCC = 2.3 V
— –12 VCC = 2.7 V
— –24 VCC = 3.0 V
—12mAV
—12 V
—24 V

= 2.3 V

CC

= 2.7 V

CC

= 3.0 V

CC

3