HIT HD74LV373A Datasheet

HD74LV373A

Octal D-type Transparent Latches with 3-state Outputs

ADE-205-274 (Z)

1st Edition
April 1999

Description

The HD74LV373A has eight D type latches with three state outputs in a 20 pin package. When the latch
enables input is high, the Q outputs will follow the D inputs. When the latch enables goes low, data at the
D inputs will be retained at the outputs until latch enable returns high again. When a high logic level is
applied to the output control input, all outputs go to a high impedance state, regardless of what signals are
present at the other inputs and the state of the storage elements. Low-voltage and high-speed operation is
suitable for the battery-powered products (e.g., notebook computers), and the low-power consumption
extends the battery life.

Features

• VCC = 2.0 V to 5.5 V operation

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

• All outputs VO (Max.) = 5.5 V (@VCC = 0 V)

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

• Typical VOH undershoot > 2.3 V (@VCC = 3.3 V, Ta = 25°C)

• Output current ±8 mA (@VCC = 3.0 V to 3.6 V), ±16 mA (@VCC = 4.5 V to 5.5 V)

Function Table

Inputs
OE LE D Output Q

HXXZ
LHLL
LHHH
LLXQ

Note: H: High level

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

: Output level before the indicated steady state input conditions were established.

0

0

HD74LV373A

Pin Arrangement

OE

V

1

20

CC

1Q
1D
2D
2Q
3Q
3D
4D
4Q

GND

10

2
3
4
5

6
7
8
9

(Top view)

19
18
17
16
15
14
13
12
11

8Q
8D
7D
7Q
6Q
6D
5D
5Q
LE

2

HD74LV373A

Absolute Maximum Ratings

Item Symbol Ratings Unit Conditions

Supply voltage range V
Input voltage range*
Output voltage range*

1

1, 2

Input clamp current I
Output clamp current I
Continuous output current I
Continuous current through

V

or GND

CC

Maximum power dissipation
at Ta = 25°C (in still air)*

3

CC

V

I

V

O

IK

OK

O

or I

I

CC

GND

P

T

Storage temperature Tstg –65 to 150 °C
Notes: 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.

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

2. This value is limited to 5.5 V maximum.

3. The maximum package power dissipation was calculated using a junction temperature of 150°C.

–0.5 to 7.0 V
–0.5 to 7.0 V
–0.5 to VCC + 0.5 V Output: H or L
–0.5 to 7.0 VCC: OFF or Output: Z
–20 mA VI < 0

±50 mA VO < 0 or VO > V
±35 mA VO = 0 to V

CC

CC

±70 mA

835 mW SOP

757 TSSOP

3

HD74LV373A

Recommended Operating Conditions

Item Symbol Min Max Unit Conditions

Supply voltage range V
Input voltage range V
Output voltage range V

Output current I

CC

I

O

OH

I

OL

Input transition rise or fall rate ∆t /∆v 0 200 ns/V VCC = 2.3 to 2.7 V

Operating free-air temperature Ta –40 85 °C
Note: Unused or floating inputs must be held high or low.

2.0 5.5 V
0 5.5 V
0VCCV H or L
0 5.5 High impedance state
— –50 µAV
—–2 mAV
—–8 V

= 2.0 V

CC

= 2.3 to 2.7 V

CC

= 3.0 to 3.6 V

CC

— –16 VCC = 4.5 to 5.5 V
—50 µAV

= 2.0 V

CC

— 2 mA VCC = 2.3 to 2.7 V
—8 V
—16 V

= 3.0 to 3.6 V

CC

= 4.5 to 5.5 V

CC

0 100 VCC = 3.0 to 3.6 V
020 V

= 4.5 to 5.5 V

CC

Logic Diagram

OE

LE

1D

1

11

C1

3

1D

To Seven Other Channels

2

1Q

4

HD74LV373A

DC Electrical Characteristics

• Ta = –40 to 85°C

Item Symbol VCC (V)* Min Typ Max Unit Test Conditions

Input voltage V

Output voltage V

Input current I
Off-state

IH

V

IL

OH

V

OL

IN

I

OZ

output current
Quiescent

I

CC

supply current
Output leakage

I

OFF

current
Input

C

IN

capacitance

Note: For conditions shown as Min or Max, use the appropriate values under recommended operating

conditions.

2.0 1.5 — — V

2.3 to 2.7 VCC × 0.7 — —

3.0 to 3.6 VCC × 0.7 — —

4.5 to 5.5 VCC × 0.7 — —

2.0 — — 0.5

2.3 to 2.7 — — VCC × 0.3

3.0 to 3.6 — — VCC × 0.3

4.5 to 5.5 — — VCC × 0.3
Min to

VCC – 0.1 — — V IOH = –50 µA

Max

2.3 2.0 — — IOH = –2 mA

3.0 2.48 — — IOH = –8 mA

4.5 3.8 — — IOH = –16 mA
Min to

— — 0.1 IOL = 50 µA

Max

2.3 — — 0.4 IOL = 2 mA

3.0 — — 0.44 IOL = 8 mA

4.5 — — 0.55 IOL = 16 mA
0 to 5.5 — — ±1 µAVIN = 5.5 V or GND

5.5 — — ±5 µAVO = VCC or GND

5.5 — — 20 µAVIN = VCC or GND, IO = 0

0——5 µAVI or VO = 0 to 5.5 V

3.3 — 2.9 — pF VI = VCC or GND

5