Datasheet 74LV123PW, 74LV123N, 74LV123DB Datasheet (Philips)

INTEGRATED CIRCUITS

74LV123

Dual retriggerable monostable multivibrator with reset

Product specification Supersedes data of 1997 Feb 04 IC24 Data Handbook

 

1998 Apr 20

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator with reset

FEA TURES

•Optimized for Low Voltage applications: 1.0 to 5.5V

•Accepts TTL input levels between V

•Typical V

T

amb

•Typical V

T

amb

(output ground bounce)  0.8V @ VCC = 3.3V,

OLP

= 25°C

(output VOH undershoot)  2V @ VCC = 3.3V,

OHV

= 25°C

= 2.7V and VCC = 3.6V

CC

•DC triggered from active HIGH or active LOW inputs

•Retriggerable for very long pulses up to 100% duty factor

•Direct reset terminates output pulses

•Schmitt-trigger action on all inputs except for the reset input

•Output capability: standard (except for nR

•I

category: MSI

CC

EXT/CEXT

QUICK REFERENCE DATA

GND = 0V; T

SYMBOL

t

PHL/tPLH

C

I

C

PD

NOTES:

1. C

is used to determine the dynamic power dissipation (PD in µW)

PD

= CPD  V

P

D

f

= input frequency in MHz; CL = output load capacitance in pF;

i

= output frequency in MHz; VCC = supply voltage in V;

f

o

 (C

= 25°C; tr = tf 2.5 ns

amb

CC

2

 V

L

 fo) = sum of the outputs.

CC

PARAMETER CONDITIONS TYPICAL UNIT

Propagation delay nA, nB to nQ, nQ nRD to nQ, nQ

Input capacitance 3.5 pF Power dissipation capacitance per monost-

able

2

 fi  (CL  V

2

 fo) where:

CC

)

DESCRIPTION

The 74LV123 is a low-voltage Si-gate CMOS device and is pin and function compatible with the 74HC/HCT123.

The 74LV123 is a dual retriggerable monostable multivibrator with output pulse width control by three methods. The basic pulse time is programmed by selection of an external resistor (R capacitor (C Figure 1. Once triggered, the basic output pulse width may be extended by retriggering the gated active LOW-going edge input (nA process, the output pulse period (nQ = HIGH, nQ made as long as desired. Alternatively, an output delay can be terminated at any time by a LOW-going edge on input nR also inhibits the triggering. Figures 1 and 2 illustrate pulse control by retriggering and early reset. The basic output pulse width is essentially determined by the values of the external timing components R see Figure 5. When C width is defined as: t t

= pulse width in ns; R

W

C

EXT

nB inputs makes the circuit highly tolerant of slower input rise and fall times.

CL = 15pF V

= 3.3V

CC

= 5KΩ

R

EXT

C

= 0pF

EXT

VCC = 3.3V, VI = GND to V

74L V123

) and

). They are normally connected as shown in

EXT

) or the active HIGH-going edge input (nB). By repeating this

and C

EXT

= external capacitor in pF. Schmitt-trigger action in the nA and

CC

. For pulse width when C

EXT

 10,000pF, the typical output pulse

EXT

= 0.45  R

W

= external resistor in KΩ; and

EXT

1

 C

EXT

25 20

60 pF

EXT

= LOW) can be

EXT

(typ.), where

EXT

, which

D

<10000pF,

ns ns

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. #

16-Pin Plastic DIL –40°C to +125°C 74LV123 N 74LV123 N SOT38-1 16-Pin Plastic SO –40°C to +125°C 74LV123 D 74LV123 D SOT109-1 16-Pin Plastic SSOP Type II –40°C to +125°C 74LV123 DB 74LV123 DB SOT338-1 16-Pin Plastic TSSOP Type I –40°C to +125°C 74L V123 PW 74LV123PW DH SOT403-1

1998 Apr 28 853–191 1 19290

2

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator with reset

PIN CONFIGURATION

SV00096

16

V

CC

15

1R

EXT/CEXT

14

1C

EXT

13

1Q

12

2Q

11

2R

D

10

2B

9

2A

13

4

5

12

1

1A 1B

2

1R

3

D

1Q

4 5

2Q

2C

6

EXT

GND

7 8

2R

EXT/CEXT

PIN DESCRIPTION

NUMBER

1,9 1A, 2A

2,10 1B, 2B

3,11 1RD, 2R

4, 12 1Q, 2Q Outputs (active LOW)

7 2R 8 GND Ground (0V)

13, 5 1Q, 2Q Outputs (active HIGH) 14, 6

15 1R 16 V

SYMBOL FUNCTION

Trigger inputs (negative-edge triggered)

Trigger inputs (positive-edge triggered)

Direct reset LOW and trigger action at

D

positive edge

EXT/CEXT

1C

EXT,

2C

EXT

EXT/CEXT

CC

External resistor/capacitor connection

External capacitor connection External resistor/capacitor connection

Positive supply voltage

LOGIC SYMBOL (IEEE/IEC)

14 15

1 2

3

6 7

9 10

CX RCX

&

R

CX RCX

&

LOGIC SYMBOL

1A

1 9

2A

1B

2

2B

10

1R

3

D

11

2R

D

FUNCTIONAL DIAGRAM

1A

1

2A

9

1B

2

2B

10

1R

3

D

11

2R

D

74LV123

14

1C

EXT

2C

6

EXT

1R

EXT/CEXT

2R

EXT/CEXT

S

Q

T

Q

R

D

1R

EXT/CEXT

2R

EXT/CEXT

S

Q

T

Q

R

D

1Q 2Q

SV00097

1C

EXT

2C

EXT

1Q 2Q

SV00099

15

7

13

5

4

12

14

6

15

7

13

5

4

12

1998 Apr 28

11

R

SV00098

3

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator with reset

LOGIC DIAGRAM

R

D

RR

CLCLV

CC

V

CC

CL

R

nR

V

CC

74LV123

EXT/CEXT

Q

A

B

R

It is recommended that Pin 6 (2C

) and Pin 14 (1C

EXT

CLCL

FUNCTION TABLE

INPUTS OUTPUTS

nR

D

L X X L H X H X L * H * X X L L * H * H L ↑ H ↓ H ↑ L H

NOTES:

* If the monostable was triggered before this condition was

established, the pulse will continue as programmed. H = HIGH voltage level L = LOW voltage level X = don’t care

↑ = LOW-to-HIGH transition ↓ = HIGH-to-LOW transition

= one HIGH level output pulse = one LOW level output pulse

nA nB nQ nQ

) by externally grounded to Pin 8 (GND)

EXT

to nC

(pin 14 or 6)

Figure 1.Timing component connection

EXT

SV00100

V

CC

R

EXT

C

EXT

to nR

EXT/CEXT

(pin 15 or 7)

SV00101

1998 Apr 28

4

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator

74LV123

with reset

RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT

1

1.0 3.3 5.5 V

CC CC

–40 –40

– – – –

+85

+125

500 200 100

50

25

T

V

tr, t

CC

V

amb

DC supply voltage See Note Input voltage 0 – V

I

Output voltage 0 – V

O

Operating ambient temperature range in free air

Input rise and fall times except for

f

Schmitt-trigger inputs

NOTE:

1. The LV is guaranteed to function down to V

ABSOLUTE MAXIMUM RATINGS

= 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to VCC = 5.5V.

CC

1, 2

In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0V).

SYMBOL

V

CC

I

IK

I

OK

I

O

DC supply voltage –0.5 to +7.0 V DC input diode current VI < –0.5 or VI > VCC + 0.5V 20 mA DC output diode current VO < –0.5 or VO > VCC + 0.5V 50 mA DC output source or sink current

– standard outputs

PARAMETER CONDITIONS RATING UNIT

–0.5V < VO < VCC + 0.5V

See DC and AC

characteristics

VCC = 1.0V to 2.0V VCC = 2.0V to 2.7V VCC = 2.7V to 3.6V VCC = 3.6V to 5.5V

V V

°C

ns/V

mA

I

P

GND

T

TOT

stg

DC VCC or GND current for types with

,

– standard outputs 50

CC

Storage temperature range –65 to +150 °C Power dissipation per package

– plastic DIL – plastic mini-pack (SO) – plastic shrink mini-pack (SSOP and TSSOP)

for temperature range: –40 to +125°C above +70°C derate linearly with 12 mW/K above +70°C derate linearly with 8 mW/K above +60°C derate linearly with 5.5 mW/K

750 500 500

mA

mW

NOTES:

1. Stresses beyond those listed 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 .

2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

1998 Apr 28

5

Philips Semiconductors Product specification

V

voltage all out uts

V

g

V

voltage all out uts

V

g

V

Dual retriggerable monostable multivibrator with reset

DC ELECTRICAL CHARACTERISTICS

Over recommended operating conditions. V oltages are referenced to GND (ground = 0V).

SYMBOL P ARAMETER TEST CONDITIONS

VCC = 1.2V 0.9 0.9

IH

HIGH level Input voltage

VCC = 2.0V 1.4 1.4 VCC = 2.7 to 3.6V 2.0 2.0 VCC = 4.5 to 5.5V 0.7V VCC = 1.2V 0.3 0.3

IL

LOW level Input voltage

VCC = 2.0V 0.6 0.6 VCC = 2.7 to 3.6V 0.8 0.8 VCC = 4.5 to 5.5 0.3V VCC = 1.2V; VI = VIH or V VCC = 2.0V; VI = VIH or V

OH

HIGH level output

;

V

VCC = 2.7V; VI = VIH or V

p

VCC = 3.0V; VI = VIH or V VCC = 4.5V; VI = VIH or V

OH

HIGH level output voltage; STANDARD outputs

VCC = 3.0V; VI = VIH or V

VCC = 4.5V; VI = VIH or V VCC = 1.2V; VI = VIH or V

VCC = 2.0V; VI = VIH or V

OL

LOW level output

;

V

VCC = 2.7V; VI = VIH or V

p

VCC = 3.0V; VI = VIH or V VCC = 4.5V; VI = VIH or V

LOW level output voltage;

OL

STANDARD outputs

Input leakage

I

current

CC

Quiescent supply current; MSI

I

VCC = 3.0V; VI = VIH or V

VCC = 4.5V; VI = VIH or V

VCC = 5.5V; VI = VCC or GND 1.0 1.0 µA

VCC = 5.5V; VI = VCC or GND; IO = 0 20.0 160 µA

IL; IL; IL; IL; IL;

IL;

IL; IL; IL; IL; IL;

IL;

Additional

CC

quiescent supply current

VCC = 2.7V to 3.6V; VI = VCC – 0.6V 500 850 µA

∆I

NOTES:

1. All typical values are measured at T

amb

= 25°C.

–IO = 100µA 1.2 –IO = 100µA 1.8 2.0 1.8 –IO = 100µA 2.5 2.7 2.5 –IO = 100µA 2.8 3.0 2.8 –IO = 100µA 4.3 4.5 4.3

–IO = 6mA 2.40 2.82 2.20

–IO = 12mA 3.60 4.20 3.50 IO = 100µA 0

IO = 100µA 0 0.2 0.2 IO = 100µA 0 0.2 0.2 IO = 100µA 0 0.2 0.2 IO = 100µA 0 0.2 0.2

IO = 6mA 0.25 0.40 0.50

IO = 12mA 0.35 0.55 0.65

-40°C to +85°C -40°C to +125°C

MIN TYP

CC

LIMITS

1

MAX MIN MAX

0.7V

CC

74LV123

CC

0.3V

UNIT

CC

V

1998 Apr 28

6

Philips Semiconductors Product specification

CONDITION

P

Figure 3

nR

D

nQ

R

P

Figure 3

nR

D

nQ

R

P

Figure 3

nR

D

(reset)

R

P

Figure 3

nR

D

(reset)

R

t

gg

Figure 3

ns

t

gg

Figure 3

ns

t

Figure 2

ns

t

nQ

HIGH

C

100nF

µs

Q

EXT

t

nQ

HIGH

C

0F

ns

Q

EXT

t

gg

C

0F

ns

EXT

Dual retriggerable monostable multivibrator with reset

AC CHARACTERISTICS

GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF; RL =1 KΩ

SYMBOL PARAMETER WAVEFORM

VCC(V) MIN TYP

1.2 120

2.0 40 76 92

2.7 30 56 68

3.0 to 3.6 25

4.5 to 5.5 18

1.2 120

2.0 40 76 92

2.7 30 56 68

3.0 to 3.6 25

4.5 to 5.5 182 40 46

1.2 100

2.0 30 57 68

2.7 23 43 51

3.0 to 3.6 20

4.5 to 5.5 14

1.2 100

2.0 30 57 68

2.7 23 43 51

3.0 to 3.6 20

4.5 to 5.5 14

2.0 30 5 40

2.7 25 3.5 30

3.0 to 3.6 20 3.0

4.5 to 5.5 15 2.5

2.0 30 13 40

2.7 25 8 30

3.0 to 3.6 20 7

4.5 to 5.5 15 5

2.0 35 6 45

2.7 30 5 40

3.0 to 3.6 25 4

4.5 to 5.5 20 3

2.0 470

2.7 460

3.0 to 3.6 450

4.5 to 5.5 430

2.0 100

2.7 90

3.0 to 3.6 80

4.5 to 5.5 70

2.0 70

2.7 55

3.0 to 3.6 45

4.5 to 5.5 40

t

PHL

t

PLH

t

PHL

t

PLH

ropagation delay

, nA, nB, to

ropagation delay

, nA, nB, to

ropagation delay

to nQ

ropagation delay

to nQ

W

Trigger pulse width nA = LOW

Trigger pulse width nB = HIGH

Reset pulse width nRD = LOW

Output pulse width

W

=

nQ = LOW

Output pulse width

W

rt

=

nQ = LOW

Retrigger time nA, nB

Figure 3

C

= 0pF

EXT

= 5KΩ

EXT

Figure 3

C

= 0pF

EXT

= 5KΩ

EXT

Figure 3

C

= 0pF

EXT

= 5KΩ

EXT

Figure 3

C

= 0pF

EXT

= 5KΩ

EXT

Figures 1, 2

=

EXT

R

= 10KΩ

Figures 1, 2

=

EXT

R

= 5KΩ

Figure 1

=

EXT

R

= 5KΩ

p

74LV123

LIMITS

–40 to +85°C –40 to +125°C

1

MAX MIN MAX

2

48 57

2

40 46

2

48 57

2

38 45

2

31 36

2

38 45

2

31 36

2 2

25 20

30 25

UNIT

ns

1998 Apr 28

7

Philips Semiconductors Product specification

CONDITION

Ext

resistor

Ext

3

ca acitor

Dual retriggerable monostable multivibrator with reset

AC CHARACTERISTICS (Continued)

GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF; RL =1 KΩ

SYMBOL PARAMETER WAVEFORM

VCC(V) MIN TYP MAX MIN MAX

1.2 10 1000

R

EXT

C

EXT

ernal timing

p

Figure 5

NOTES:

1. Unless otherwise stated, all typical values are at T

2. Typical value measured at V

3. Typical value measured at V

4. For other R

if C

EXT

where, t

and C

EXT

> 10 nF, the next formula is valid:

t

W W

R

EXT

K = constant = 0.45 for V

EXT

= K x R = output pulse width in ns; = external resistor in KΩ; C

The inherent test jig and pin capacitance at pins 15 and 7 (nR

= 3.3V.

CC

= 5.0V.

CC

combinations see Figure 5.

x C

EXT

(typ.)

EXT

= 5.0V and 0.48 for VCC = 2.0V .

CC

EXT

= 25°C.

amb

= external capacitor in pF;

5. The time to retrigger the monostable multivibrator depends on the values of R

The output pulse width will only be extended when the time between the active-going edges of the

trigger pulses meets the minimum retrigger time.

If C

> 10 pF, the next formula (at VCC = 5.0V) for the set-up time of a retrigger pulse is valid:

EXT

t

= 30 + 0.19R x C-9 + 13 x R

rt

where, t

The inherent test jig and pin capacitance at pins 15 and 7 (nR

= retrigger time in ns;

rt

= external capacitor in pF;

C

EXT

R

= external resistor in KΩ.

EXT

1.05

(typ.)

6. When the device is powered up, initiate the device via a reset pulse, when C

2.0 5 1000

2.7 3 1000

3.0 to 3.6 2 1000

4.5 to 5.5 2 1000

1.2

2.0

2.7

3.0 to 3.6

4.5 to 5.5

EXT/CEXT

) is approximately 7 pF.

and C

EXT

) is approximately 7 pF.

< 50pF.

EXT

74LV123

LIMITS

–40 to +85°C –40 to +125°C

No limits pF

.

UNIT

ΚΩ

AC WAVEFORMS

VM = 1.5V at VCC  2.7V; VM = 0.5 VCC at VCC  2.7V; VOL and VOH are the typical output voltage drop that occur with the output load.

nB INPUT

t

W

INPUT

nA

t

rt

nQ OUTPUT

t

W

1998 Apr 28

t

W

t

W

Figure 1.Output pulse control using retrigger pulse;

nR

= HIGH.

D

t

W

SV00139

8

nB INPUT

INPUT

nR

D

t

W

nQ OUTPUT

t

W

Figure 2.Output pulse control using reset input nRD;

nA

= LOW.

t

W

SV00140

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator with reset

nB INPUT (nA LOW)

nA INPUT (nB HIGH)

nR

INPUT

D

Q OUTPUT

V

M

t

W

t

W

t

PLH

V

M

t

PLH

74LV123

V

M

t

W

OUTPUT

Q

t

W

V

M

TLH

t

THL

t

THL

t

TLH

t

PHL

t

PLH

t

W

Figure 3. Input (nA, nB, nRD) to output (nQ, nQ) propagation delays, the output transition times,

and the input and output pulse widths.

t

PLH

t

PHL

SV00197

1998 Apr 28

9

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator with reset

APPLICATION INFORMATION

0.8

‘K’ factor

0.4

0

024

1

3

V

(V)

CC

5

SV00185

6

Figure 4. HCT typical “k” factor as a function of VCC;

= 10 nF; RX = 10 KW to 100 KW.

C

X

6

10

Power-up considerations

When the monostable is powered-up it may produce an output pulse, with a pulse width defined by the values of R output pulse can be eliminated using the circuit shown in Figure 6.

74LV123

and CX. This

X

C

X

R

X

V

CC

nC

EXT

A B

“123”

RESET V

Figure 6. Power-up output pulse elimination circuit

nR

EXT/CEXT

Q

CC

SV00152

R

=

EXT

5

10

4

10

t

W

ns

3

10

2

10

0

110

10 10

100kW

50kW

10kW

2kW

2

C

(pF)

EXT

3

Figure 5.Typical output pulse width as a function of the

external capacitor values at V

= 3.3V and T

CC

amb

= 25°C.

10

SV00141

Power-down considerations

A large capacitor (C

) may cause problems when powering-down

X

the monostable due to the energy stored in this capacitor. When a system containing this device is powered-down or a rapid decrease of V

to zero occurs, the monostable may sustain damage, due to

CC

the capacitor discharging through the input protection diodes. To avoid this possibility, connect a damping diode (D

) preferably a

X

germanium or Schottky type diode able to withstand large current surges as shown in Figure 7.

D

X

V

4

C

X

nR

EXT/CEXT

R

X

CC

SV00154

Figure 7. Power-down protection circuit

1998 Apr 28

10

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator with reset

TEST CIRCUIT

V

cc

V

CC

2.7V

CC

V

O

50pF

C

L

of pulse generators.

OUT

I

RL= 1k

SV00902

V

PULSE

GENERATOR

l

D.U.T.

R

T

Test Circuit for Outputs

DEFINITIONS

RL = Load resistor CL = Load capacitance includes jig and probe capacitiance RT = Termination resistance should be equal to Z

TEST

t

PLH/tPHL

V

CC

< 2.7V

2.7–3.6V ≥ 4.5 V V

Figure 8. Load circuitry for switching times

74LV123

1998 Apr 28

11

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator

74LV123

with reset

DIP16: plastic dual in-line package; 16 leads (300 mil); long body SOT38-1

1998 Apr 28

12

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator

74LV123

with reset

SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1

1998 Apr 28

13

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator

74LV123

with reset

SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm SOT338-1

1998 Apr 28

14

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator

74LV123

with reset

TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm SOT403-1

1998 Apr 28

15

Philips Semiconductors Product specification

Dual retriggerable monostable multivibrator with reset

DEFINITIONS

74LV123

Data Sheet Identification Product Status Definition

Objective Specification

Preliminary Specification

Product Specification

Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification.

LIFE SUPPORT APPLICA TIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected

to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.

Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381

Formative or in Design

Preproduction Product

Full Production

This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.

This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product.

 Copyright Philips Electronics North America Corporation 1998

print code Date of release: 05-96 Document order number: 9397-750-04418

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1998 Apr 28

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