HIT HD74LV221A Datasheet

HD74LV221A

Dual Monostable Multivibrators

ADE-205-271A (Z)

2nd Edition

June 1999

Description

The HD74LV221A features output pulse-duration control by three methods. In the first method, the A
input is low and the B input goes high. In the second method, the B input is high and the A input goes low.
In the third method, the A input is low, the B input is high, and the clear (CLR) input goes high.
The basic pulse duration is programmed by selecting external resistance and capacitance values. The
external timing capacitor must be connected between Cext and Rext/Cext (positive) and an external resistor
connected between Rext/Cext and VCC.
To obtain variable pulse durations, connect an external variable resistance between Rext/Cext and VCC.
Pulse duration can be reduced by taking CLR low.

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)

• Output current ±6 mA (@VCC = 3.0 V to 3.6 V), ±12 mA (@VCC = 4.5 V to 5.5 V)

HD74LV221A

Function Table

Inputs Outputs
CLR A BQ Q

L XXL H
XHXLH
XXLLH
HL↑
H ↓ H
↑ LH

Note: H: High level

L: Low level
X: Immaterial

↑: Low to high transition
↓: High to low transition

: High level pulse

: Low level pulse

Pin Arrangement

1A
1B

1CLR

1Q
2Q

2Cext

2Rext / Cext

GND

1

2

3
4
5

6

7

8 9

(Top view)

16

V

CC

15

1Rext / Cext

14

1Cext

13

1Q

12

2Q

11

2CLR

2B

10

2A

2

HD74LV221A

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
–20 mA VI < 0

±50 mA VO < 0 or VO > V
±25 mA VO = 0 to V

CC

±50 mA

785 mW SOP

500 TSSOP

CC

3

HD74LV221A

Recommended Operating Conditions

Item Symbol Min Typ 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

External timing registance Rext 5 — — kΩ VCC = 2.0 V

External timing capacitance Cext — unlimited — F
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
0— VCCV
— — –50 µAV

= 2.0 V

CC

— — –2 mA VCC = 2.3 to 2.7 V
— — –6 VCC = 3.0 to 3.6 V
— — –12 VCC = 4.5 to 5.5 V
—— 50 µAV

= 2.0 V

CC

—— 2 mA VCC = 2.3 to 2.7 V
—— 6 VCC = 3.0 to 3.6 V
— — 12 VCC = 4.5 to 5.5 V

0 — 100 VCC = 3.0 to 3.6 V
0 — 20 VCC = 4.5 to 5.5 V

1— — V

≥ 3.0 V

CC

Logic Diagram

4

CLR

A

Q

Q

B

Q

Q

CLR

HD74LV221A

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
Input current

IH

V

IL

OH

V

OL

IN

I

IN

Rext / Cext
Quiescent

I

CC

supply current

Active state

∆I

CC

supply
current
(per circuit)

Output leakage
current

Input
capacitance

I

OFF

C

IN

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 IOL = –50 µA

Max

2.3 2.0 — — IOL = –2 mA

3.0 2.48 — — IOL = –6 mA

4.5 3.8 — — IOL = –12 mA
Min to

— — 0.1 V IOL = 50 µA

Max

2.3 — — 0.4 IOL = 2 mA

3.0 — — 0.44 IOL = 6 mA

4.5 — — 0.55 IOL = 12 mA
0 to 5.5 — — ±1 µAVIN = 5.5 V or GND

5.5 — — ±2.5 µAVIN = VCC or GND

5.5 — — 20 µAVIN = VCC or GND, IO = 0

2.3 — — 220 µAVIN = VCC or GND
Rext/Cext = 0.5 V

CC

3.0 280

4.5 650

5.5 975

0——5 µAVO = 5.5 V

3.3 — 4.0 — pF VI = VCC or GND

5

HD74LV221A

Switching Characteristics

• VCC = 2.5 ± 0.2 V

Ta = 25°C Ta = –40 to 85°C

Item Symbol Min Typ Max Min Max Unit Test Conditions

Propa­gation
delay time

Pulse
width

Output
pulse
width

t

PLH

t

PHL

t

w

t

wQ

∆t

wQ

— 13.3 31.4 1.0 37.0 ns CL = 15 pF A or B Q or Q

— 15.5 36.0 1.0 42.0 CL = 50 pF
— 10.9 25.0 1.0 29.5 CL = 15 pF CLR Q or Q
— 12.5 32.8 1.0 34.5 CL = 50 pF
— 13.5 33.4 1.0 39.0 CL = 15 pF CLR Q or Q
— 15.9 38.0 1.0 44.0 CL = 50 pF (Trigger)

6.0 — — 6.5 — ns A, B or CLR

— 170 260 — 320 ns CL = 50 pF,

Cext = 28 pF, Rext = 2 kΩ

90 100 110 90 110 µsCL = 50 pF,

Cext = 0.01 µF, Rext = 10 kΩ

0.9 1.0 1.1 0.9 1.1 ms CL = 50 pF,
Cext = 0.1 µF, Rext = 10 kΩ

— ±1— — — % CL = 50 pF

FROM
(Input)

TO
(Output)

6