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Texas Instruments SN74LV221AQPWRG4Q1
- Part No.:
- SN74LV221AQPWRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Multivibrators
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV221AQPWRG4Q1.pdf
- Description:
- IC MULTIVIBRATOR 13.2NS 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,169
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Product details
Overview
SN74LV221AQPWRG4Q1 from Texas Instruments is a dual monostable multivibrator with Schmitt-trigger inputs, designed for automotive applications (AEC-Q100 qualified), operating from 2 V to 5.5 V, featuring programmable pulse duration via external R/C networks and overriding clear functionality. It delivers jitter-free triggering on slow input transitions and supports mixed-mode voltage operation across all ports.
For engineers reviewing the SN74LV221AQPWRG4Q1 datasheet, SN74LV221AQPWRG4Q1 pinout, SN74LV221AQPWRG4Q1 application, or SN74LV221AQPWRG4Q1 equivalent, key selection considerations include its AEC-Q100 qualification, ±1% output pulse-duration variation (Δtw), Ioff partial-power-down support, and compatibility with SN74AHC123A/SN74AHCT123A layouts where retriggering is unused.
Technical Context
This device implements two independent edge-triggered monostable circuits, each with separate negative-edge (A) and positive-edge (B) trigger inputs plus an overriding active-high CLR input. Pulse width is determined by external Rext and Cext components connected to dedicated pins (Rext/Cext, Cext), with timing governed by tw = K × Rext × Cext (K ≈ 1.0 for Cext ≥ 1000 pF).
Schmitt-trigger hysteresis on A, B, and CLR inputs ensures robust noise immunity and eliminates false triggering from slow-rising/falling signals. Glitch-free power-up reset guarantees Q low / Q high at startup without external reset circuitry, and Ioff protection prevents backflow current during partial power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables direct interface with 2.5 V, 3.3 V, and 5 V logic domains without level shifters |
| Operating Temp | –40°C to 125°C - certified for under-hood automotive environments per AEC-Q100 Grade 1 |
| Output Pulse Variation | ±1% Δtw - tight unit-to-unit consistency in pulse duration under identical R/C conditions |
| Input Hysteresis | Schmitt-trigger on A/B/CLR - tolerates slow input edges (e.g., RC-filtered signals) without chatter |
| Ioff Support | Active at VCC = 0 V - disables outputs to prevent damaging current flow when powered down |
| Propagation Delay | 7.4 ns (min) at 5 V - ensures fast response for timing-critical edge detection and pulse shaping |
| Timing Resolution | 90 μs to 1.1 ms (adjustable) - covers wide range of delay needs using standard R/C values (e.g., 10 kΩ + 0.01 μF) |
Pinout & Package
TSSOP-16 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A | Negative-edge trigger input | Triggers output pulse on falling edge; Schmitt-triggered for noise immunity |
| 1B, 2B | Positive-edge trigger input | Triggers output pulse on rising edge; Schmitt-triggered for noise immunity |
| 1CLR, 2CLR | Active-high override clear | Forces Q low / Q high immediately, terminating ongoing pulse regardless of A/B state |
| 1Q, 2Q | In-phase output | Active-high pulse output; TTL-compatible rise/fall times independent of pulse width |
| 1Q, 2Q | Complementary output | Active-low pulse output; synchronized with 1Q/2Q and mutually exclusive |
| 1Cext, 2Cext | Timing capacitor connection | Connects external capacitor (Cext) between this pin and Rext/Cext to set pulse duration |
| 1Rext/Cext, 2Rext/Cext | Shared timing resistor/capacitor node | Connects external resistor (Rext) between this pin and VCC; also ties to Cext for timing network |
| GND (Pin 8), VCC (Pin 16) | Power supply terminals | Decoupling required: high-frequency capacitor between VCC and GND per application note |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Validated for automotive use (Grade 1, –40°C to 125°C), including stress testing and reliability screening |
| Mixed-Voltage Interface | Accepts 2-V to 5.5-V inputs while powered from any VCC in that range - simplifies inter-voltage-domain signal conditioning |
| Glitch-Free Power-Up | Outputs initialize to known Q = L / Q = H state without external reset - eliminates boot-time race conditions |
| Three Trigger Modes | Supports A↓, B↑, or CLR↑ activation - provides design flexibility for different edge-sensing requirements |
| Variable Pulse Width | Adjustable from ~90 μs to >1 ms using standard R/C combinations - replaces fixed-delay ICs or discrete 555-based designs |
Applications
| Engine Control Unit Timing | ADAS Sensor Pulse Conditioning |
|---|---|
Use Scenario: Generating precise, jitter-free delay pulses for fuel injector firing sequencing or camshaft position synchronization in engine management systems. IC Role / Device Role / Timing Role: Dual monostable providing two independent, temperature-stable delays with automotive-grade reliability and AEC-Q100 qualification. Use Value: ±1% pulse variation ensures consistent valve timing across temperature and unit variance, critical for emissions compliance and torque control. | Use Scenario: Converting noisy, slow-rising radar or camera sensor enable signals into clean, fixed-duration strobes for time-of-flight measurement windows. IC Role / Device Role / Timing Role: Schmitt-triggered monostable suppressing EMI-induced glitches while delivering deterministic pulse width for sensor gating. Use Value: Input hysteresis rejects <50 ns noise spikes; programmable R/C allows tuning to exact sensor integration time (e.g., 100 μs). |
| Infotainment System Debounce | Body Control Module Reset Coordination |
Use Scenario: Debouncing mechanical switch inputs (e.g., door lock buttons, HVAC controls) in vehicle infotainment panels exposed to vibration and ESD. IC Role / Device Role / Timing Role: Monostable generating stable 10–100 ms output pulses to replace software debounce or RC+MCU solutions. Use Value: Eliminates MCU polling overhead and firmware complexity; Ioff support enables safe integration into partially powered subsystems. | Use Scenario: Synchronizing power-on reset sequences across multiple microcontrollers in body control modules (BCM), ensuring orderly initialization. IC Role / Device Role / Timing Role: Dual monostable generating staggered, glitch-free reset pulses with controlled delay between sub-systems. Use Value: Power-up reset guarantee ensures deterministic Q/Q states; dual outputs allow independent timing for MCU1 and MCU2 reset lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar monostable multivibrator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHC123APWR | Non-automotive grade; operates only up to 85°C; no AEC-Q100 qualification; identical pinout and logic function | Suitable for industrial/commercial systems without extended temperature or automotive reliability requirements | Select when cost sensitivity outweighs automotive qualification and extended temperature range |
| SN74LV123APWR | Same LV family but non-Q1 variant; rated –40°C to 105°C (not 125°C); lacks AEC-Q100 certification; same TSSOP-16 pinout | Applicable in non-automotive embedded systems requiring 3.3 V operation and moderate temperature range | Choose if full AEC-Q100 and 125°C operation are unnecessary, and lower cost is prioritized |
Compared with SN74AHC123APWR and SN74LV123APWR, the SN74LV221AQPWRG4Q1 uniquely delivers AEC-Q100 Grade 1 qualification, guaranteed operation to 125°C, and tighter ±1% pulse-duration matching - making it the only option for safety-critical automotive timing where thermal stability and unit-to-unit consistency are mandatory.
Availability
SN74LV221AQPWRG4Q1 is available at Aetrix Electronics and suitable for engine control units, ADAS sensor interfaces, infotainment switch debouncing, and body control module reset coordination requiring stable component supply across automotive production lifecycles.
Supply support for SN74LV221AQPWRG4Q1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and automotive-grade silicon, with leadership in high-reliability interface and timing solutions.
The SN74LV221A-Q1 belongs to TI's automotive-qualified logic portfolio, engineered specifically for robust timing generation in harsh-temperature vehicle subsystems where deterministic pulse behavior and long-term reliability are essential.
FAQ
What is the maximum operating temperature for the SN74LV221AQPWRG4Q1?
The SN74LV221AQPWRG4Q1 is rated for continuous operation from –40°C to +125°C and is AEC-Q100 qualified for automotive Grade 1 applications. This specification is validated across process corners and lifetime reliability testing, making it suitable for under-hood environments such as engine control modules and transmission control units where ambient temperatures exceed 105°C.
Does the SN74LV221AQPWRG4Q1 support partial power-down operation?
Yes, the SN74LV221AQPWRG4Q1 includes Ioff circuitry that actively disables outputs when VCC = 0 V, preventing damaging current backflow through the device during partial power-down scenarios. This feature is explicitly characterized in the datasheet with Ioff ≤ 10 μA at 3.3 V and ensures safe integration into multi-rail automotive systems where subsystems power up/down asynchronously.
Can the SN74LV221AQPWRG4Q1 replace the SN74AHC123A in existing designs?
The SN74LV221AQPWRG4Q1 has identical pin assignments to the SN74AHC123A and SN74AHCT123A, enabling drop-in replacement in layouts where the retrigger feature is not used. However, designers must verify that the AEC-Q100 qualification, wider temperature range (–40°C to 125°C vs. –40°C to 85°C), and LV-family voltage thresholds meet system requirements before substitution.
How is output pulse duration calculated for the SN74LV221AQPWRG4Q1?
Output pulse duration (tw) is calculated using tw = K × Rext × Cext, where Rext is connected between Rext/Cext and VCC, and Cext is connected between Cext and Rext/Cext. For Cext ≥ 1000 pF, K = 1.0; for smaller values, K is derived from Figure 7 in the datasheet. Measured tw ranges from 90 μs (10 kΩ + 0.01 μF) to 1.1 ms (10 kΩ + 0.1 μF) at 25°C.
What packaging and tape-and-reel details apply to the SN74LV221AQPWRG4Q1?
The SN74LV221AQPWRG4Q1 is supplied in a TSSOP-16 (PW) package with 2000 units per large tape-and-reel. Reel dimensions are 330 mm diameter × 12.4 mm width; pin 1 orientation is Quadrant Q1. The device features NIPDAU lead finish, RoHS compliance, and JEDEC MO-153 registration, with MSL Level-1 rating for unlimited floor life at ≤30°C/60% RH.
SN74LV221AQPWRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Monostable
- Independent Circuits:
- 2
- Schmitt Trigger Input:
- Yes
- Propagation Delay:
- 13.2 ns
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 2 V ~ 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74LV221AQPWRG4Q1 FAQ
1.How can I place an order for SN74LV221AQPWRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV221AQPWRG4Q1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74LV221AQPWRG4Q1 reliable?
The price and inventory of SN74LV221AQPWRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV221AQPWRG4Q1 is usually 5 days.
3.What payment methods are accepted for SN74LV221AQPWRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV221AQPWRG4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV221AQPWRG4Q1?
SN74LV221AQPWRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV221AQPWRG4Q1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74LV221AQPWRG4Q1?
For technical support, including SN74LV221AQPWRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV221AQPWRG4Q1 requirements.
6.How does Aetrix verify that SN74LV221AQPWRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74LV221AQPWRG4Q1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LV221AQPWRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74LV221AQPWRG4Q1?
All SN74LV221AQPWRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV221AQPWRG4Q1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74LV221AQPWRG4Q1 part is unused and in its original packaging.
Return procedure for SN74LV221AQPWRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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