Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Multivibrator Monostable 5.3 ns SOIC 16 N

SN54AHCT123A, SN74AHCT123A

DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS

SCLS420G – JUNE 1998 – REVISED APRIL 2003

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Inputs Are TTL-Voltage Compatible

Schmitt-Trigger Circuitry On A, B, and CLR

Inputs for Slow Input Transition Rates

Edge Triggered From Active-High or

Active-Low Gated Logic Inputs

Retriggerable for Very Long Output Pulses

Overriding Clear Terminates Output Pulse

Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

description/ordering information

These edge-triggered multivibrators feature

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 output pulse duration is programmed by

selecting external resistance and capacitance

values. The external timing capacitor must be

connected between C

ext

and R

ext

(positive)

and an external resistor connected between

ext

and V

. To obtain variable pulse

durations, connect an external variable resistance

between R

ext

and V

. The output pulse

duration also can be reduced by taking CLR

low.

ORDERING INFORMATION

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP – N Tube SN74AHCT123AN SN74AHCT123AN

SOIC D

Tube SN74AHCT123AD

AHCT123A

40°Cto85°C

SOIC

–

Tape and reel SN74AHCT123ADR

AHCT123A

–

40°C

85°C

SSOP – DB Tape and reel SN74AHCT123ADBR HB123A

TSSOP – PW Tape and reel SN74AHCT123APWR HB123A

TVSOP – DGV Tape and reel SN74AHCT123ADGVR HB123A

CDIP – J Tube SNJ54AHCT123AJ SNJ54AHCT123AJ

–55°C to 125°C

CFP – W Tube SNJ54AHCT123AW SNJ54AHCT123AW

LCCC – FK Tube SNJ54AHCT123AFK SNJ54AHCT123AFK

†

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

SN54AHCT123A ...J OR W PACKAGE

SN74AHCT123A . . . D, DB, DGV, N, OR PW PACKAGE

(TOP VIEW)

SN54AHCT123A . . . FK PACKAGE

(TOP VIEW)

1CLR

ext

GND

ext

2CLR

3212019

910111213

ext

2CLR

1CLR

ext

GND

NC – No internal connection

ext

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.

Summary of content (26 pages)

PAGE 1
SN54AHCT123A, SN74AHCT123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS SCLS420G – JUNE 1998 – REVISED APRIL 2003 D D D D D D D SN54AHCT123A . . . J OR W PACKAGE SN74AHCT123A . . .
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SN54AHCT123A, SN74AHCT123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS SCLS420G – JUNE 1998 – REVISED APRIL 2003 description/ordering information(continued) Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input pulse. The A, B, and CLR inputs have Schmitt triggers with sufficient hysteresis to handle slow input transition rates with jitter-free triggering at the outputs.
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SN54AHCT123A, SN74AHCT123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS SCLS420G – JUNE 1998 – REVISED APRIL 2003 input/output timing diagram trr A B CLR Rext/Cext Q Q tw tw tw + trr absolute maximum ratings over operating free-air temperature (unless otherwise noted)† Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input voltage range, VI (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . .
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SN54AHCT123A, SN74AHCT123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS SCLS420G – JUNE 1998 – REVISED APRIL 2003 recommended operating conditions (see Note 4) SN54AHCT123A SN74AHCT123A MIN MAX MIN MAX 4.5 5.5 4.5 5.5 UNIT VCC VIH Supply voltage VIL VI Low-level input voltage 0.8 V Input voltage 0 5.5 0 5.
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SN54AHCT123A, SN74AHCT123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS SCLS420G – JUNE 1998 – REVISED APRIL 2003 switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.
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SN54AHCT123A, SN74AHCT123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS SCLS420G – JUNE 1998 – REVISED APRIL 2003 PARAMETER MEASUREMENT INFORMATION From Output Under Test tw Test Point 3V CL (see Note A) 1.5 V Inputs 1.5 V 0V VOH LOAD CIRCUIT 50% VCC Outputs 50% VCC VOL VOLTAGE WAVEFORMS PULSE DURATION 3V Input A (see Note B) 1.5 V 0V 3V Input B (see Note B) 1.
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SN54AHCT123A, SN74AHCT123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS SCLS420G – JUNE 1998 – REVISED APRIL 2003 APPLICATION INFORMATION caution in use To prevent malfunctions due to noise, connect a high-frequency capacitor between VCC and GND, and keep the wiring between the external components and Cext and Rext/Cext terminals as short as possible.
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SN54AHCT123A, SN74AHCT123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS SCLS420G – JUNE 1998 – REVISED APRIL 2003 APPLICATION INFORMATION retriggering data The minimum input retriggering time (tMIR) is the minimum time required after the initial signal before retriggering the input. After tMIR, the device retriggers the output. Experimentally, it also can be shown that to retrigger the output pulse, the two adjacent input signals should be tMIR apart, where tMIR = 0.30 × tw.
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SN54AHCT123A, SN74AHCT123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS SCLS420G – JUNE 1998 – REVISED APRIL 2003 APPLICATION INFORMATION† 1.00E+09 VCC = 5 V TA = 25°C 1.00E+08 RT = 200k Ω t w – Output Pulse Duration – ns 1.00E+07 RT = 150k Ω 1.00E+06 RT = 80k Ω 1.00E+05 RT = 10k Ω 1.00E+04 RT = 5k Ω 1.00E+03 1.00E+02 RT = 1k Ω 1.00E+01 1.00E+00 1 102 10 103 104 105 106 107 CT – External Timing Capacitance – pF Figure 5.
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SN54AHCT123A, SN74AHCT123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS SCLS420G – JUNE 1998 – REVISED APRIL 2003 APPLICATION INFORMATION† OUTPUT PULSE-DURATION CONSTANT vs SUPPLY VOLTAGE MINIMUM TRIGGER TIME vs VCC CHARACTERISTICS 10.00 1.20 Output Pulse-Duration Constant – K t rr – Minimum Retrigger Time – µs RT = 1 kΩ TA = 25°C CT = 0.01 µF 1.00 CT = 1000 pF 0.10 CT = 100 pF 0.01 0 1 2 3 4 5 1.15 RT = 10 kΩ TA = 25°C tW = K × C T × R T 1.10 CT = 1000 pF 1.05 CT = 0.01 µF 1.00 0.95 0.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com (4) 25-Sep-2013 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.
PAGE 14
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 6.6 2.5 12.0 16.0 Q1 SN74AHCT123ADBR SSOP DB 16 2000 330.0 16.4 8.2 SN74AHCT123ADGVR TVSOP DGV 16 2000 330.0 12.4 6.8 4.0 1.6 8.0 12.0 Q1 SN74AHCT123ADR SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.
PAGE 15
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74AHCT123ADBR SSOP DB 16 2000 367.0 367.0 38.0 SN74AHCT123ADGVR TVSOP DGV 16 2000 367.0 367.0 35.0 SN74AHCT123ADR SOIC D 16 2500 333.2 345.9 28.6 SN74AHCT123APWR TSSOP PW 16 2000 367.0 367.0 35.
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MECHANICAL DATA MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000 DGV (R-PDSO-G**) PLASTIC SMALL-OUTLINE 24 PINS SHOWN 0,40 0,23 0,13 24 13 0,07 M 0,16 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 0°– 8° 1 0,75 0,50 12 A Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,08 14 16 20 24 38 48 56 A MAX 3,70 3,70 5,10 5,10 7,90 9,80 11,40 A MIN 3,50 3,50 4,90 4,90 7,70 9,60 11,20 DIM 4073251/E 08/00 NOTES: A. B. C. D. All linear dimensions are in millimeters.
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MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.