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SN54121J

The Texas Instruments SN54121J is a monostable multivibrator with Schmitt-trigger inputs. It offers programmable output pulse width and operates over a wide temperature range.

✓ Total Stock: 278 pcs

$ Price Range: $10.11

SN54121J Available from 2 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Fe Components ✓ Non-Authorised Inventory information	272 pcs On Request	272 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Partservice ✓ Non-Authorised Inventory information	6 pcs On Request	6 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

SN54121J Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	Unclassified
Manufacturer Name	Texas Instruments
AEC Qualified	No
Automotive Grade	No
Industrial Grade	No
Lead Style	Dip
Medical Grade	No
Military Grade	No

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SN54121J Description

Short technical summary and product information.

The Texas Instruments SN54121J is a monostable multivibrator featuring dual negative-transition-triggered inputs and a single positive-transition-triggered inhibit input. It provides complementary output pulses with a pulse width that can be programmed from 40 nanoseconds to 28 seconds using external timing components. With no external components, a typical output pulse of 30-35 nanoseconds is achieved, suitable for d-c triggered reset signals.

This device boasts internal compensation for virtual temperature independence and jitter-free operation up to 90% duty cycle. The Schmitt-trigger input circuitry on the B input provides excellent noise immunity, allowing triggering from slow input transition rates. High immunity to VCC noise is also provided by internal latching circuitry.

The SN54121J operates within a temperature range of -55 to 125°C and is available in a 14-pin CDIP (J) package, supplied in tubes of 25 units. Output rise and fall times are TTL compatible and independent of pulse length, ensuring stable performance in various applications.

SN54121J Quick Information

Product Type: Monostable Multivibrator

Canonical Name: SN54121J Monostable Multivibrator

Subcategory: Multivibrators

SN54121J Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

SN54121J Estimated Pricing

Qty	Low	High
1+	$10.11	$10.11

Estimated market price range - modelled values for guidance only, not live distributor offers.

SN54121J Features

Programmable output pulse width.
Schmitt-trigger inputs for noise immunity.
Jitter-free operation up to 90% duty cycle.
Wide operating temperature range.
TTL compatible outputs.

SN54121J Applications

Pulse generation circuits.
Timing delay applications.
Event triggering.
Reset signal generation.

SN54121J FAQs

7 frequently asked questions generated from this part’s specifications.

What is the operating temperature range for the SN54121J?

The operating temperature range is -55 to 125 °C.

What is the typical output pulse width with an internal resistor (Rint)?

The typical output pulse width with an internal resistor is 35 ns.

What is the programmable output pulse width range using external components?

The output pulse width can be programmed from 40 ns to 28 seconds using external components.

What is the typical noise immunity for the B input?

The typical noise immunity for the B input is 1.2 V.

What is the typical noise immunity to VCC noise?

The typical noise immunity to VCC noise is 1.5 V.

What is the maximum duty cycle for jitter-free operation?

Jitter-free operation is maintained up to 90% duty cycle.

What package type is the SN54121J supplied in?

The SN54121J is supplied in a 14-pin CDIP (J) package.