This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

Images are for reference only See technical specifications

SN74LS123D

In Stock: 4,189

28ns 4.75V~5.25V SOIC-16 Monostable Multivibrators ROHS

Manufacturers: Texas Instruments
Mfr.Part#:
SN74LS123D
Datasheet:
SN74LS123D Datasheet (PDF)
Package/Case:
SOIC (D)-16
Product Type:
Multivibrators
Lifecycle:
Obsolete
EDA/CAD Models:
Request Free CAD Models for SN74LS123D

SN74LS123D Information

Description

Here's a concise introduction to the SN74LS123D: The SN74LS123D is a dual retriggerable monostable multivibrator from Rochester Electronics, packaged in a SOIC-16 format. This component features DC-triggered logic inputs that can be either active-high or active-low gated, allowing for flexible design options. With retrigger ability up to 100% duty cycle, this device provides for very long output pulses. The SN74LS123D has an overriding clear terminal, which Terminates the Output Pulse when triggered. This device is particularly useful in applications that require reliable timing and pulse generation, such as electronic control systems, telecommunications equipment, or industrial automation devices.

Features

The SN74LS123D features:

D-C triggered from active-high or active-low gated logic inputs
Retriggerable for very long output pulses, up to 100% duty cycle
Overriding clear terminates output pulse
'122 and 'LS122 have internal timing resistors

Package

The package type of SN74LS123D is SOIC-16 (Small Outline Integrated Circuit - 16 pins).

Pinout

The SN74LS123D is a dual retriggerable monostable multivibrator with 16 pins in a SOIC-16 package.

Here's a concise breakdown of the pin functions:

Pins 1-8: Inputs (A, B, C, D, E, F, G, H)
Pin 9: Output (Y)
Pins 10-15: Unused
Pin 16: VCC (Power)

The device has two monostable multivibrators that can be triggered by active-high or active-low logic inputs. The output pulse can be retriggered and has an overriding clear function to terminate the output pulse.

Manufacturer

The manufacturer of the SN74LS123D is Rochester Electronics, which is a leading independent semiconductor distributor and manufacturer of electronic components.

Applications

The SN74LS123D is a dual retriggerable monostable multivibrator, making it suitable for applications requiring precise timing and pulse generation. Common uses include:

Pulse stretching or compression
Timing circuits in industrial control systems
Medical device timing and synchronization
Telecommunications equipment timing and signaling
Automotive electronics, such as anti-lock braking systems (ABS) and traction control systems (TCS)

Its retriggerable feature allows for long output pulses with high duty cycles.

Equivalent

According to Rohrerbus, the equivalent products for SN74LS123D are:

Texas Instruments SN54ALS122
Fairchild Semiconductor FM1146
Motorola MC1022
National Semiconductor LM1146

Please note that equivalent products may have similar functionality but not identical characteristics due to variations in internal design and manufacturing processes.

Specifications

Number of channels	2	Supply voltage (min) (V)	4.75
Supply voltage (max) (V)	5.25	Technology family	LS
Input type	Bipolar	Output type	Push-Pull
Supply current (µA)	20000	IOL (max) (mA)	8
IOH (max) (mA)	-0.4	Features	Retriggerable, Standard speed (tpd > 50ns)
Operating temperature range (°C)	0 to 70	Rating	Catalog
Package/Case	SOIC (D)-16

SN74LS123D FAQs

1.Q: Are there related parts with similar functionality?

A: Alternatives may include 74LS123 (dual retriggerable monostable) or CD4047 (CMOS multivibrator), though specs vary.

2.Q: What certifications or standards apply to this IC?

A: It complies with ECCN EAR99 (export control) and HTS 8542.39.00.01, but lacks automotive (AEC-Q) or PPAP certifications.

3.Q: What is the thermal resistance of the SO16 package for this IC?

A: The SOIC-16 package has a typical thermal resistance (θJA) of ~80°C/W; heatsinking may be needed for high-frequency operation.

4.Q: What are the recommended operating conditions for this IC?

A: Operate at 5V (4.75V–5.25V), 0°C to 70°C, with quiescent current ≤12mA. Ensure CMOS-compatible input levels.

5.Q: What are the absolute maximum ratings for this IC?

A: Absolute max ratings: 5.25V supply voltage, 70°C operating temperature, and 8mA low-level output current. Exceeding these may damage the device.

6.Q: In what applications is this monostable multivibrator IC typically used?

A: Common applications include pulse stretching, timing circuits, debouncing switches, and sequential logic systems in industrial/consumer electronics.

7.Q: What are the key features of this CMOS-based dual monostable multivibrator?

A: Key features include: 2 channels, 56ns max propagation delay, 4.75V–5.25V supply range, LS logic family, and surface-mount SO16 packaging.

8.Q: What is the pinout configuration of Rochester Electronics' dual monostable multivibrator IC (SO16 package)?

A: The 16-pin SOIC package follows a standard gull-wing pinout, with two independent monostable circuits. Refer to the datasheet for specific pin assignments (e.g., trigger inputs, outputs, and power pins).

Service Policies and Others

After-Sales & Settlement Related

Payment

Payment Method

TT/Wire Transfer

Paypal

Western Union

Money Gram

For alternative payment channels, please reach out to us at:

[email protected]

Shipping & Packing

Shipping Method

Fedex

UPS

DHL

TNT

Packing

AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.

Warranty

365-Day Product Quality Guarantee

We promise to provide 365 days quality assurance service for all our products.

After Sales Service

Returns and exchanges are supported, provided the items remain in their original condition.

Ratings and Reviews

S

S**a
06/29/2025

4

super fast good seller+++++++
D

D**o
01/31/2022

7

I have not checked the capacitance, but seems to be OK..
G

G**n
12/06/2020

17

Excellent module. I connected it just from the battery 18650 + 2 speaker and charge board. Plays norms. Speakers of 3 w.

Write a Review

You need to log in to reply.

Reference Price（USD）

Request For Price

Quantity

Unit Price

Ext. Price

$0.344

$0.34

500+

$0.199

$99.50

1000+

$0.190

$190.00

10+

$0.278

$2.78

30+

$0.250

$7.50

100+

$0.215

$21.50

*The prices above are for reference only.

100,000+ Inventory
One-stop services
Best
Price
Quality Assurance

Service Support

Email: [email protected]

Teams: [email protected]

Tel: +852 95804164

Qualification

Payment Methods

Shipping Information

Shipped From:
HK warehouse
Expected Shipping Date:
to

(HKT)
Expected Quotation Date:
(HKT)
Supplier Lead-Time:
Call for availability

*Lead times apply to standard orders and are based on business days only. Please contact us for details.

Top Sellers

STM32F103C8T6

4,270+

STM32F103C8T6 with 37 LQFP-48 package
$0.649
TP4056

7,793+

ROHS Compliant 1A Battery Management ICs for Lithium Ion/Polymer Batteries in 4.35V~6V Range
$0.032
ESP8266

2,129+

Access your WiFi network with the ESP8266 WiFi Module, a self-contained SOC with TCP/IP protocol stack integration

NE555

2,365+

100kHz operation frequency with low power consumption for long-lasting performance
PC817

3,573+

DC Input, Transistor Output Optocoupler with V Isolati
SIM800L

3,187+

High-Speed GPRS Capabilities and Reliable GSM Communication in One Small Packag

Recommended For You

5,452 PCS

SN74LVC1G32DBVR

10uA 1.65V~5.5V 1 4ns@5V,50pF ORGate SOT-23-5 Gates ROHS

Rohs :

True

Lifecycle Status :

ACTIVE

Technology Family:

LVC

Supply Voltage (min) (V):

1.65

Supply Voltage (max) (V):

5.5

Number Of Channels:

[email protected]

live:.cid.ab6b29428937b76

+852 95804164

6,738 PCS

SN74LV14APWR

Schmitt Trigger 6 20uA 10.6ns@5V,50pF 2V~5.5V TSSOP-14 Inverters ROHS

Rohs :

True

Lifecycle Status :

Active

Technology Family:

LV-A

Supply Voltage (min) (V):

Supply Voltage (max) (V):

5.5

Number Of Channels:

[email protected]

live:.cid.ab6b29428937b76

+852 95804164

9,943 PCS

SN74AHC1G08DBV3

2V~5.5V 1uA 1 7.9ns@5V,50pF AND Gate SOT-23-5 Gates ROHS

Rohs :

True

Lifecycle Status :

Active

Technology Family:

AHC

Supply Voltage (min) (V):

Supply Voltage (max) (V):

5.5

Number Of Channels:

[email protected]

live:.cid.ab6b29428937b76

+852 95804164

7,072 PCS

SN74ACT14PWR

Schmitt Trigger 6 11.5ns@5V,50pF 2uA 4.5V~5.5V TSSOP-14 Inverters ROHS

Rohs :

True

Lifecycle Status :

ACTIVE

Technology Family:

ACT

Supply Voltage (min) (V):

4.5

Supply Voltage (max) (V):

5.5

Number Of Channels:

[email protected]

live:.cid.ab6b29428937b76

+852 95804164

7,072 PCS

SN74HC00AN

Digital logic device for complex circuit designs; reliable and efficient

Rohs :

True

Lifecycle Status :

Active

Logic Function:

NAND

Number Of Gates:

4 Gate

Logic Family:

Number Of Input Lines:

8 Input

[email protected]

live:.cid.ab6b29428937b76

+852 95804164

5,777 PCS

SN74LVC1G08DPWR

This AND Gate IC enables precise control over electronic circuits

Rohs :

True

Lifecycle Status :

Active

Technology Family:

LVC

Supply Voltage (min) (V):

1.65

Supply Voltage (max) (V):

5.5

Number Of Channels:

[email protected]

live:.cid.ab6b29428937b76

+852 95804164

6,177 PCS

SN74LVC2G04DRLR

Suitable for converting logic signals in electronic circuits

Rohs :

True

Lifecycle Status :

Active

Technology Family:

LVC

Supply Voltage (min) (V):

1.65

Supply Voltage (max) (V):

5.5

Number Of Channels:

[email protected]

live:.cid.ab6b29428937b76

+852 95804164

5,745 PCS

SN74AUP1G08DRLR

Small form factor package with temperature range of -40 to 85 degrees Celsius

Rohs :

True

Lifecycle Status :

Active

Technology Family:

AUP

Supply Voltage (min) (V):

0.8

Supply Voltage (max) (V):

3.6

Number Of Channels:

[email protected]

live:.cid.ab6b29428937b76

+852 95804164

ESD
Tape and Reel
Cut Tape
Tube or Tray