74AHCT123ABQ-G_技术文档

74AHC123A; 74AHCT123A

Dual retriggerable monostable multivibrator with reset

Rev. 02 — 18 January 2008

Product data sheet

1. General description

The 74AHC123A; 74AHCT123A are high-speed Si-gate CMOS devices and are pin

compatible with Low power Schottky TTL (LSTTL). They are speciﬁed in compliance with

JEDEC standard no. 7A.

The 74AHC123A; 74AHCT123A are dual retriggerable monostable multivibrators with

output pulse width control by three methods. The basic pulse time is programmed by

selection of an external resistor (R_EXT) and capacitor (C_EXT). The external resistor and

capacitor are normally connected as shown in Figure 11.

Once triggered, the basic output pulse width may be extended by retriggering the gated

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

this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made as long as

desired. Alternatively an output delay can be terminated at any time by a LOW-going edge

on input nRD, which also inhibits the triggering.

An internal connection from nRD to the input gate makes it possible to trigger the circuit by

a positive-going signal at input nRD as shown in Table 3. Figure 8 and Figure 9 illustrate

pulse control by retriggering and early reset. The basic output pulse width is essentially

determined by the value of the external timing components R_EXTand C_EXT. When

C_EXT≥ 10 nF, the typical output pulse width is deﬁned as: t_W= R_EXT× C_EXTwhere

t_W= pulse width in ns; R_EXT= external resistor in kΩ; C_EXT= external capacitor in pF.

Schmitt-trigger action at all inputs makes the circuit highly tolerant to slower input rise and

fall times. The 74AHC123A; 74AHCT123A is identical to the 74AHC423; 74AHCT423 but

can be triggered via the reset input.

2. Features

■ All inputs have a Schmitt-trigger action

■ Inputs accept voltages higher than V_CC

■ DC triggered from active HIGH or active LOW inputs

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

■ Direct reset terminates output pulse

■ For 74AHC123A only: operates with CMOS input levels

■ For 74AHCT123A only: operates with TTL input levels

■ ESD protection:

◆ HBM JESD22-A114E exceeds 2000 V

◆ MM JESD22-A115-A exceeds 200 V

◆ CDM JESD22-C101C exceeds 1000 V

■ Multiple package options

■ Speciﬁed from −40 °C to +85 °C and from −40 °C to +125 °C

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

3. Ordering information

Table 1.

Ordering information

Type number

Package

Temperature range

−40 °C to +125 °C

Name

Description

Version

74AHC123AD

SO16

plastic small outline package; 16 leads;

body width 3.9 mm

SOT109-1

74AHCT123AD

74AHC123APW

74AHCT123APW

74AHC123ABQ

74AHCT123ABQ

−40 °C to +125 °C

TSSOP16

plastic thin shrink small outline package; 16 leads; SOT403-1

body width 4.4 mm

DHVQFN16 plastic dual in-line compatible thermal enhanced

very thin quad ﬂat package; no leads; 16 terminals;

body 2.5 × 3.5 × 0.85 mm

SOT763-1

4. Functional diagram

14

CX

15

RCX

13

1

&

14 1CEXT

2CEXT

15 1REXT/CEXT

2REXT/CEXT

2

3

6

4

7

R

S

13 1Q

Q

6

5

2Q

CX

RCX

&

1A

2A

1

9

T

7

5

4

1Q

9

1B

2

12 2Q

2B 10

10

R

D

1RD

3

12

2RD 11

11

R

001aae521

001aae522

Fig 1. Logic symbol

Fig 2. IEC logic symbol

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

2 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

14

1CEXT

15

1REXT/CEXT

S

13

1Q

Q

1

1A

T

4

2

3

1B

R

D

1RD

6

7

2CEXT

2REXT/CEXT

S

5

2Q

Q

9

2A

T

12

10

11

2B

R

D

2RD

001aaa610

Fig 3. Functional diagram

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

3 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

nREXT/CEXT

V

CC

Q

RD

R

V

CL

CC

V

CC

R

A

B

CL

001aae524

R

For minimum noise generation it is recommended to ground pins 6 (2CEXT) and 14 (1CEXT) externally to pin 8 (GND).

Fig 4. Functional diagram

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

4 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

5. Pinning information

5.1 Pinning

74AHC123A

74AHCT123A

terminal 1

index area

74AHC123A

74AHCT123A

2

3

4

5

6

7

15

14

13

12

11

10

1B

1RD

1REXT/CEXT

1CEXT

1Q

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

1A

V

CC

1Q

1B

1RD

1REXT/CEXT

1CEXT

1Q

2Q

1Q

2CEXT

2REXT/CEXT

(1)

2RD

2B

GND

2Q

2CEXT

2REXT/CEXT

GND

2RD

2B

001aah067

2A

Transparent top view

001aah068

(1) The die substrate is attached to this pad using

conductive die attach material. It can not be used as

a supply pin or input.

Fig 5. Pin conﬁguration SO16, TSSOP16

Fig 6. Pin conﬁguration DHVQFN16

5.2 Pin description

Table 2.

Symbol

1A

Pin description

1

Description

negative-edge triggered input 1

positive-edge triggered input 1

direct reset LOW and positive-edge triggered input 1

active LOW output 1

1B

2

1RD

3

1Q

4

2Q

5

active HIGH output 2

2CEXT

2REXT/CEXT

GND

6

external capacitor connection 2

external resistor and capacitor connection 2

ground (0 V)

7

8

2A

9

negative-edge triggered input 2

positive-edge triggered input 2

direct reset LOW and positive-edge triggered input 2

active LOW output 2

2B

10

11

12

13

14

15

16

2RD

2Q

1Q

active HIGH output 1

1CEXT

1REXT/CEXT

V_CC

external capacitor connection 1

external resistor and capacitor connection 1

supply voltage

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

5 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

6. Functional description

Table 3.

Function table^[1]

Input

nRD

L

Output

nA

X

nB

X

nQ

H

L

X

H

X

L^[2]

H^[2]

X

L

H

L

↑

H

↓

H

↑

L

[1] 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.

[2] If the monostable multivibrator was triggered before this condition was established, the pulse will continue as programmed.

7. Limiting values

Table 4.

Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).

Symbol

V_CC

V_I

Parameter

Conditions

Min

−0.5

−20

-

Max

+7.0

-

Unit

V

supply voltage

input voltage

V

[1]

I_IK

input clamping current

output clamping current

output current

V_I< −0.5 V

mA

°C

I_OK

V_O< −0.5 V or V_O> V_CC+ 0.5 V

V_O= −0.5 V to (V_CC+ 0.5 V)

±20

±25

75

I_O

-

I_CC

supply current

-

I_GND

T_stg

P_tot

ground current

−75

−65

-

storage temperature

total power dissipation

SO16 package

+150

T_amb= −40 °C to +125 °C

[2]

[3]

[4]

-

500

mW

TSSOP16 package

DHVQFN16 package

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

[2] P_totderates linearly with 8 mW/K above 70 °C.

[3] P_totderates linearly with 5.5 mW/K above 60 °C.

[4] P_totderates linearly with 4.5 mW/K above 60 °C.

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

6 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

8. Recommended operating conditions

Table 5.

Recommended operating conditions

Voltages are referenced to GND (ground = 0 V).

Symbol Parameter

Conditions

74AHC123A

74AHCT123A

Unit

Min

2.0

0

Typ

Max

5.5

Min

4.5

0

Typ

Max

5.5

V_CC

+125

-

V_CC

V_I

supply voltage

input voltage

5.0

V

-

5.5

-

V

V_O

output voltage

ambient temperature

0

-

V_CC

+125

100

20

0

-

V

T_amb

∆t/∆V

−40

-

+25

−40

-

+25

°C

ns/V

input transition rise

and fall rate

V_CC= 3.3 V ± 0.3 V

V_CC= 5.0 V ± 0.5 V

-

20

9. Static characteristics

Table 6.

Static characteristics

Voltages are referenced to GND (ground = 0 V).

Symbol Parameter

Conditions

25 °C

Min Typ Max

−40 °C to +85 °C −40 °C to +125 °C Unit

Min

Max

Min

Max

74AHC123A

V_IH

HIGH-level

input voltage

V_CC= 2.0 V

1.5

-

1.5

-

1.5

-

V

V_CC= 3.0 V

2.1

V_CC= 5.5 V

3.85

-

3.85

-

3.85

-

V_IL

LOW-level

input voltage

V_CC= 2.0 V

-

0.5

0.9

1.65

-

0.5

0.9

1.65

-

0.5

0.9

1.65

V_CC= 3.0 V

V_CC= 5.5 V

V_OH

HIGH-level

output

V_I= V_IHor V_IL

I_O= −50 µA; V_CC= 2.0 V

I_O= −50 µA; V_CC= 3.0 V

I_O= −50 µA; V_CC= 4.5 V

I_O= −4.0 mA; V_CC= 3.0 V

I_O= −8.0 mA; V_CC= 4.5 V

V_I= V_IHor V_IL

1.9 2.0

2.9 3.0

4.4 4.5

-

1.9

2.9

-

1.9

2.9

-

V

voltage

4.4

2.58

3.94

-

2.48

3.8

2.40

3.70

V_OL

LOW-level

output

voltage

I_O= 50 µA; V_CC= 2.0 V

I_O= 50 µA; V_CC= 3.0 V

I_O= 50 µA; V_CC= 4.5 V

I_O= 4.0 mA; V_CC= 3.0 V

I_O= 8.0 mA; V_CC= 4.5 V

-

0

-

0.1

-

0.1

-

0.1

V

0.1

0.36

0.44

0.55

-

I_I

inputleakage V_I= 5.5 V or GND;

current _CC= 0 V to 5.5 V

V

[1]

nREXT/CEXT

-

±0.25

±0.1

-

±2.5

±1.0

-

±10.0

±2.0

µA

pin nA, nB, nRD

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

7 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

Table 6.

Static characteristics …continued

Voltages are referenced to GND (ground = 0 V).

Symbol Parameter

Conditions

25 °C

−40 °C to +85 °C −40 °C to +125 °C Unit

Min Typ Max

Min

Max

Min

Max

I_CC

supply

current

V_I= V_CCor GND; I_O= 0 A;

-

4.0

-

40

-

80

µA

V_CC= 5.5 V

[1]

active state (per circuit);

V_I= V_CCor GND

V_CC= 3.0 V

V_CC= 4.5 V

V_CC= 5.5 V

-

160 250

380 500

560 750

-

280

650

975

10

-

280

650

975

10

µA

pF

C_I

input

5.0

10

capacitance

C_O

output

-

4.0

-

pF

capacitance

74AHCT123A

V_IH

HIGH-level

input voltage

V_CC= 4.5 V to 5.5 V

2.0

-

2.0

-

2.0

-

V

V_IL

LOW-level

0.8

input voltage

V_OH

HIGH-level

output

voltage

V_I= V_IHor V_IL; V_CC= 4.5 V

I_O= −50 µA

4.4 4.5

-

4.4

3.8

-

4.4

-

V

I_O= −8.0 mA

3.94

-

3.70

V_OL

LOW-level

output

voltage

V_I= V_IHor V_IL; V_CC= 4.5 V

I_O= 50 µA

-

0

-

0.1

0.36

±0.25

-

0.1

-

0.1

0.55

±10.0

V

I_O= 8.0 mA

0.44

±2.5

V

[1]

I_I

inputleakage nREXT/CEXT;

-

µA

current

V_I= 5.5 V or GND;

_CC= 0 V to 5.5 V

V

pin nA, nB, nRD;

V_I= V_CCor GND;

-

±0.1

-

±1.0

-

±2.0

µA

V

_CC= 5.5 V

V_I= V_CCor GND; I_O= 0 A;

_CC= 5.5 V

I_CC

supply

current

4.0

40

80

V

[1]

active state (per circuit);

V_I= V_CCor GND

V_CC= 4.5 V

V_CC= 5.5 V

-

380 500

560 750

-

650

975

10

-

650

975

10

µA

pF

C_I

input

3

10

capacitance

C_O

output

-

4.0

-

pF

capacitance

[1] Voltage on nREXT/CEXT = 0.5 × V_CCand pin REXT/CEXT in OFF-state during test.

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

8 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

10. Dynamic characteristics

Table 7.

Dynamic characteristics

GND = 0 V; For test circuit see Figure 12.

Symbol Parameter Conditions

25 °C

−40 °C to +85 °C −40 °C to +125 °C Unit

Min Typ^[1]Max Min

Max

Min

Max

74AHC123A

[2]

t_pd

propagation nA and nB to nQ and nQ;

delay

see Figure 7

V_CC= 3.0 V to 3.6 V

C_L= 15 pF

-

7.4 20.6

10.5 24.1

1.0

24.0

27.5

1.0

26.0

30.0

ns

C_L= 50 pF

V_CC= 4.5 V to 5.5 V

C_L= 15 pF

-

5.1 12.0

7.3 14.0

1.0

14.0

16.0

1.0

15.5

17.5

ns

C_L= 50 pF

nRD to nQ and nQ;

see Figure 7

V_CC= 3.0 V to 3.6 V

C_L= 15 pF

-

8.2 22.4

11.7 25.9

1.0

26.0

29.5

1.0

28.0

32.0

ns

C_L= 50 pF

V_CC= 4.5 V to 5.5 V

C_L= 15 pF

-

5.6 12.9

8.1 14.9

1.0

15.0

17.0

1.0

16.5

19.0

ns

C_L= 50 pF

nRD to nQ and nQ (reset);

see Figure 7

V_CC= 3.0 V to 3.6 V

C_L= 15 pF

-

6.4 15.8

9.2 19.3

1.0

18.5

22.0

1.0

20.0

24.5

ns

C_L= 50 pF

V_CC= 4.5 V to 5.5 V

C_L= 15 pF

-

4.4

9.4

1.0

11.0

13.0

1.0

12.0

14.5

ns

C_L= 50 pF

6.3 11.4

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

9 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

Table 7.

Dynamic characteristics …continued

GND = 0 V; For test circuit see Figure 12.

Symbol Parameter Conditions

25 °C

−40 °C to +85 °C −40 °C to +125 °C Unit

Min Typ^[1]Max Min

Max

Min

Max

t_W

pulse width inputs; nA = LOW;

see Figure 7

V_CC= 3.0 V to 3.6 V

V_CC= 4.5 V to 5.5 V

5.0

-

5.0

-

5.0

-

ns

inputs; nB = HIGH;

see Figure 7

V_CC= 3.0 V to 3.6 V

V_CC= 4.5 V to 5.5 V

5.0

-

5.0

-

5.0

-

ns

inputs; nRD = LOW;

see Figure 7

V_CC= 3.0 V to 3.6 V

V_CC= 4.5 V to 5.5 V

5.0

-

5.0

-

5.0

-

ns

[3]

outputs; nQ = LOW and

nQ = HIGH; C_L= 50 pF;

see Figure 7, Figure 8,

Figure 9 and Figure 10

C_EXT= 28 pF; R_EXT= 2 kΩ

V_CC= 3.0 V to 3.6 V

V_CC= 4.5 V to 5.5 V

C_EXT= 0.01 µF;

-

115 240

100 200

-

300

240

-

300

240

ns

R

_EXT= 10 kΩ

V_CC= 3.0 V to 3.6 V

V_CC= 4.5 V to 5.5 V

90

100 110

90

110

85

115

µs

C_EXT= 0.1 µF;

R

_EXT= 10 kΩ;

V_CC= 3.0 V to 3.6 V

V_CC= 4.5 V to 5.5 V

0.9

1

1.1

0.9

1.1

0.85

1.15

ms

t_rtrig

retrigger

time

nA to nB; C_EXT= 100 pF;

_EXT= 1 kΩ; C_L= 50 pF;

R

see Figure 8 and Figure 10

V_CC= 3.0 V to 3.6 V

-

60

39

-

ns

V_CC= 4.5 V to 5.5 V

nA to nB; C_EXT= 0.01 µF;

R

_EXT= 1 kΩ; C_L= 50 pF;

see Figure 8 and Figure 10

V_CC= 3.0 V to 3.6 V

-

1.5

1.2

57

-

µs

pF

V_CC= 4.5 V to 5.5 V

[4]

C_PD

power

C_L= 50 pF; f_i= 1 MHz;

V_I= GND to V_CC

dissipation

capacitance

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

10 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

Table 7.

Dynamic characteristics …continued

GND = 0 V; For test circuit see Figure 12.

Symbol Parameter Conditions

74AHCT123A

25 °C

−40 °C to +85 °C −40 °C to +125 °C Unit

Min Typ^[1]Max Min

Max

Min

Max

[2]

t_pd

propagation nA and nB to nQ and nQ;

delay

see Figure 7

V_CC= 4.5 V to 5.5 V

C_L= 15 pF

-

5.0 12.0

7.1 14.0

1.0

14.0

16.0

1.0

15.5

17.5

ns

C_L= 50 pF

nRD to nQ and nQ;

see Figure 7

V_CC= 4.5 V to 5.5 V

C_L= 15 pF

-

5.2 12.9

7.5 14.9

1.0

15.0

17.0

1.0

16.5

18.5

ns

C_L= 50 pF

nRD to nQ and nQ (reset);

see Figure 7

V_CC= 4.5 V to 5.5 V

C_L= 15 pF

-

4.7

9.4

1.0

11.0

13.0

1.0

12.0

14.5

ns

C_L= 50 pF

6.7 11.4

t_W

pulse width inputs; nA = LOW;

C_L= 50 pF; see Figure 7

V_CC= 4.5 V to 5.5 V

5.0

-

5.0

-

5.0

-

ns

inputs; nB = HIGH;

C_L= 50 pF; see Figure 7

V_CC= 4.5 V to 5.5 V

inputs; nRD = LOW;

C_L= 50 pF; see Figure 7

V_CC= 4.5 V to 5.5 V

[3]

outputs; nQ = LOW and

nQ = HIGH; C_L= 50 pF;

C

_EXT= 28 pF; R_EXT= 2 kΩ;

see Figure 7, Figure 8,

Figure 9 and Figure 10

V_CC= 4.5 V to 5.5 V

-

100 200

100 110

-

240

110

1.1

-

240

115

1.15

ns

µs

ms

C_EXT= 0.01 µF;

_EXT= 10 kΩ

R

V_CC= 4.5 V to 5.5 V

90

0.9

90

0.9

85

C_EXT= 0.1 µF;

_EXT= 10 kΩ

R

V_CC= 4.5 V to 5.5 V

1

1.1

0.85

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

11 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

Table 7.

Dynamic characteristics …continued

GND = 0 V; For test circuit see Figure 12.

Symbol Parameter Conditions

25 °C

−40 °C to +85 °C −40 °C to +125 °C Unit

Min Typ^[1]Max Min

Max

Min

Max

t_rtrig

retrigger

time

nA to nB; C_EXT= 100 pF;

_EXT= 1 kΩ; C_L= 50 pF;

R

see Figure 8 and Figure 10

V_CC= 4.5 V to 5.5 V

-

60

-

ns

nA to nB; C_EXT= 0.01 µF;

R

_EXT= 1 kΩ; C_L= 50 pF;

see Figure 8 and Figure 10

V_CC= 4.5 V to 5.5 V

-

1.5

58

-

µs

[4]

C_PD

power

C_L= 50 pF; f_i= 1 MHz;

V_I= GND to V_CC

pF

dissipation

capacitance

External components

R_EXT

external

resistance

V_CC= 2.0 V

V_CC> 3.0 V

V_CC= 2.0 V

V_CC> 3.0 V

5

1

-

kΩ

pF

[5]

C_EXT

external

capacitance

-

[1] Typical values are measured at nominal supply voltage (V_CC= 3.3 V and V_CC= 5.0 V).

[2] t_pdis the same as t_PLHand t_PHL; C_EXT= 0 pF; R_EXT= 5 kΩ.

[3] For C_EXT≥ 10 nF the typical value of the pulse width t_W(µs) = C_EXT(nF) × R_EXT(kΩ).

[4] C_PDis used to determine the dynamic power dissipation P_D(µW).

P_D= C_PD× V_CC²× f_i+ ∑ (C_L× V_CC²× f_o) where:

f_i= input frequency in MHz;

f_o= output frequency in MHz;

C_L= output load capacitance in pF;

V_CC= supply voltage in V.

[5] C_EXThas no limits.

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

12 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

11. Waveforms

V

nB input

M

(nA LOW)

t

W

V

M

nA input

(nB HIGH)

t

RESET

W

V

M

nRD input

nQ output

t

PLH

W

V

M

t

PHL

PLH

t

W

nQ output

V

M

t

PLH

PHL

001aae528

Measurement points are given in Table 8.

Fig 7. Propagation delay input (nA, nB, nRD) to output (nQ, nQ)

Table 8.

Type

Measurement points

Input

V_M

Output

V_M

74AHC123A

0.5V_CC

1.5 V

0.5V_CC

74AHCT123A

nB input

nA input

t

W

t

rtrig

t

W

nQ output

t

W

001aae526

W

nRD = HIGH

Fig 8. Output pulse control using retrigger pulse

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

13 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

nB input

nRD input

nQ output

t

W

001aae527

nA = LOW

Fig 9. Output pulse control using reset input nRD

t

rt

nA input

nB input

nRD input

nREXT/CEXT

nQ output

t

+ t

W rt

W

001aah086

Fig 10. Input and output timing

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

14 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

V

CC

R

EXT

C

EXT

to nCEXT

(pin 14 or 6)

to nREXT/CEXT

(pin 15 or 7)

mna519

Fig 11. Timing component connections

t

W

V

I

90 %

negative

pulse

V

M

10 %

0 V

t

r

f

t

f

r

V

I

90 %

positive

pulse

V

M

10 %

0 V

t

W

V

CC

V

O

I

R

L

S1

PULSE

GENERATOR

open

DUT

R

T

C

L

001aad983

Test data is given in Table 9.

Deﬁnitions test circuit:

R_T= Termination resistance should be equal to output impedance Z_oof the pulse generator

C_L= Load capacitance including jig and probe capacitance

R_L= Load resistor

S1 = Test selection switch

Fig 12. Load circuitry for switching times

Table 9.

Type

Test data

Input

Load

S1 position

t_PHL, t_PLH

open

V_I

t_r, t_f

C_L

R_L

t_PZH, t_PHZ

GND

t_PZL, t_PLZ

V_CC

74AHC123A

V_CC

3.0 V

3.0 ns

15 pF, 50 pF

1 kΩ

74AHCT123A

open

GND

V_CC

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

15 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

12. Package outline

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

SOT109-1

D

E

A

X

v

c

y

H

M

A

E

Z

16

9

Q

A

2

A

(A )

3

A

1

pin 1 index

θ

L

p

L

1

8

e

w

M

detail X

b

p

0

2.5

scale

5 mm

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

A

(1)

UNIT

A

b

c

D

E

e

H

L

p

Q

v

w

y

Z

θ

1

2

3

p

E

max.

0.25

0.10

1.45

1.25

0.49

0.36

0.25

0.19

10.0

9.8

4.0

3.8

6.2

5.8

1.0

0.4

0.7

0.6

0.7

0.3

mm

1.27

0.05

1.05

0.041

1.75

0.25

0.01

0.25

0.01

0.25

0.1

8^o

0^o

0.010 0.057

0.004 0.049

0.019 0.0100 0.39

0.014 0.0075 0.38

0.16

0.15

0.244

0.228

0.039 0.028

0.016 0.020

0.028

0.012

inches

0.069

0.01 0.004

Note

1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

99-12-27

03-02-19

SOT109-1

076E07

MS-012

Fig 13. Package outline SOT109-1 (SO16)

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

16 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

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

SOT403-1

D

E

A

X

c

y

H

v

M

A

E

Z

9

16

Q

(A )

3

A

2

A

1

pin 1 index

θ

L

p

L

1

8

detail X

w

M

b

p

e

0

2.5

5 mm

scale

DIMENSIONS (mm are the original dimensions)

A

(1)

(2)

(1)

UNIT

A

b

c

D

E

e

H

L

Q

v

w

y

Z

θ

1

2

3

p

E

p

max.

8^o

0^o

0.15

0.05

0.95

0.80

0.30

0.19

0.2

0.1

5.1

4.9

4.5

4.3

6.6

6.2

0.75

0.50

0.4

0.3

0.40

0.06

mm

1.1

0.65

0.25

1

0.2

0.13

0.1

Notes

1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.

2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

99-12-27

03-02-18

SOT403-1

MO-153

Fig 14. Package outline SOT403-1 (TSSOP16)

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

17 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

DHVQFN16: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads;

16 terminals; body 2.5 x 3.5 x 0.85 mm

SOT763-1

B

A

D

A

1

E

c

detail X

terminal 1

index area

C

terminal 1

index area

e

1

y

e

b

v

M

C

A

B

C

1

w

M

2

7

L

1

8

9

E

h

e

16

15

10

D

h

X

0

2.5

scale

5 mm

DIMENSIONS (mm are the original dimensions)

(1)

A

(1)

UNIT

A

b

c

E

e

y

D

E

L

v

w

y

1

h

1

h

max.

0.05 0.30

0.00 0.18

3.6

3.4

2.15

1.85

2.6

2.4

1.15

0.85

0.5

0.3

mm

0.05

0.1

1

0.2

0.5

2.5

0.1

0.05

Note

1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

02-10-17

03-01-27

SOT763-1

- - -

MO-241

- - -

Fig 15. Package outline SOT763-1 (DHVQFN16)

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

18 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

13. Abbreviations

Table 10. Abbreviations

Acronym

CDM

CMOS

DUT

Description

Charged-Device Model

Complementary Metal Oxide Semiconductor

Device Under Test

ESD

ElectroStatic Discharge

Human Body Model

HBM

MM

Machine Model

TTL

Transistor-Transistor Logic

14. Revision history

Table 11. Revision history

Document ID

Release date

20080118

Data sheet status

Change notice

Supersedes

74AHC_AHCT123A_2

Modiﬁcations:

Product data sheet

-

74AHC_AHCT123A_1

• The format of this data sheet has been redesigned to comply with the new identity

guidelines of NXP Semiconductors.

• Legal texts have been adapted to the new company name where appropriate.

• Section 3: DHVQFN16 package added.

• Section 7: derating values added for DHVQFN16 package.

• Section 12: outline drawing added for DHVQFN16 package.

74AHC_AHCT123A_1

20000315

Product speciﬁcation

-

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

19 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

15. Legal information

15.1 Data sheet status

Document status^[1][2]

Product status^[3]

Development

Deﬁnition

Objective [short] data sheet

This document contains data from the objective speciﬁcation for product development.

This document contains data from the preliminary speciﬁcation.

This document contains the product speciﬁcation.

Preliminary [short] data sheet Qualiﬁcation

Product [short] data sheet Production

[1]

[2]

[3]

Please consult the most recently issued document before initiating or completing a design.

The term ‘short data sheet’ is explained in section “Deﬁnitions”.

The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status

information is available on the Internet at URL http://www.nxp.com.

malfunction of an NXP Semiconductors product can reasonably be expected

15.2 Deﬁnitions

to result in personal injury, death or severe property or environmental

damage. NXP Semiconductors accepts no liability for inclusion and/or use of

NXP Semiconductors products in such equipment or applications and

therefore such inclusion and/or use is at the customer’s own risk.

Draft — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in

modiﬁcations or additions. NXP Semiconductors does not give any

representations or warranties as to the accuracy or completeness of

information included herein and shall have no liability for the consequences of

use of such information.

Applications — Applications that are described herein for any of these

products are for illustrative purposes only. NXP Semiconductors makes no

representation or warranty that such applications will be suitable for the

speciﬁed use without further testing or modiﬁcation.

Short data sheet — A short data sheet is an extract from a full data sheet

with the same product type number(s) and title. A short data sheet is intended

for quick reference only and should not be relied upon to contain detailed and

full information. For detailed and full information see the relevant full data

sheet, which is available on request via the local NXP Semiconductors sales

ofﬁce. In case of any inconsistency or conﬂict with the short data sheet, the

full data sheet shall prevail.

Limiting values — Stress above one or more limiting values (as deﬁned in

the Absolute Maximum Ratings System of IEC 60134) may cause permanent

damage to the device. Limiting values are stress ratings only and operation of

the device at these or any other conditions above those given in the

Characteristics sections of this document is not implied. Exposure to limiting

values for extended periods may affect device reliability.

Terms and conditions of sale — NXP Semiconductors products are sold

subject to the general terms and conditions of commercial sale, as published

at http://www.nxp.com/proﬁle/terms, including those pertaining to warranty,

intellectual property rights infringement and limitation of liability, unless

explicitly otherwise agreed to in writing by NXP Semiconductors. In case of

any inconsistency or conﬂict between information in this document and such

terms and conditions, the latter will prevail.

15.3 Disclaimers

General — Information in this document is believed to be accurate and

reliable. However, NXP Semiconductors does not give any representations or

warranties, expressed or implied, as to the accuracy or completeness of such

information and shall have no liability for the consequences of use of such

information.

No offer to sell or license — Nothing in this document may be interpreted

or construed as an offer to sell products that is open for acceptance or the

grant, conveyance or implication of any license under any copyrights, patents

or other industrial or intellectual property rights.

Right to make changes — NXP Semiconductors reserves the right to make

changes to information published in this document, including without

limitation speciﬁcations and product descriptions, at any time and without

notice. This document supersedes and replaces all information supplied prior

to the publication hereof.

15.4 Trademarks

Notice: All referenced brands, product names, service names and trademarks

are the property of their respective owners.

Suitability for use — NXP Semiconductors products are not designed,

authorized or warranted to be suitable for use in medical, military, aircraft,

space or life support equipment, nor in applications where failure or

16. Contact information

For additional information, please visit: http://www.nxp.com

For sales ofﬁce addresses, send an email to: salesaddresses@nxp.com

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

20 of 21

74AHC123A; 74AHCT123A

NXP Semiconductors

Dual retriggerable monostable multivibrator with reset

17. Contents

1

2

3

4

General description . . . . . . . . . . . . . . . . . . . . . . 1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Ordering information. . . . . . . . . . . . . . . . . . . . . 2

Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2

5

5.1

5.2

Pinning information. . . . . . . . . . . . . . . . . . . . . . 5

Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5

6

Functional description . . . . . . . . . . . . . . . . . . . 6

Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 6

Recommended operating conditions. . . . . . . . 7

Static characteristics. . . . . . . . . . . . . . . . . . . . . 7

Dynamic characteristics . . . . . . . . . . . . . . . . . . 9

Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Package outline . . . . . . . . . . . . . . . . . . . . . . . . 16

Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 19

Revision history. . . . . . . . . . . . . . . . . . . . . . . . 19

7

8

9

10

11

12

13

14

15

Legal information. . . . . . . . . . . . . . . . . . . . . . . 20

Data sheet status . . . . . . . . . . . . . . . . . . . . . . 20

Deﬁnitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 20

15.1

15.2

15.3

15.4

16

17

Contact information. . . . . . . . . . . . . . . . . . . . . 20

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 18 January 2008

Document identifier: 74AHC_AHCT123A_2


型号：	74AHCT123ABQ-G
厂家：	NXP
描述：	暂无描述振荡器
文件：	总21页 (文件大小：123K)
中文：	中文翻译
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74AHCT123ABQ-G [NXP]

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