My Inquiry
My Account
Texas Instruments SN74AC8541QDGSRQ1
- Part No.:
- SN74AC8541QDGSRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
SN74AC8541QDGSRQ1.pdf
- Description:
- AUTOMOTIVE EIGHT-CHANNEL 1.5V-TO
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74AC8541QDGSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive octal buffer/driver with Schmitt-trigger inputs and dual active-low 3-state enable pins (OE1, OE2). It operates from 1.5V to 6V, delivers ±24mA continuous output drive at 5V, achieves 6ns max propagation delay (5V/50pF), and drives 50Ω transmission lines - used in body control modules for signal conditioning and bus isolation.
For engineers reviewing the SN74AC8541QDGSRQ1 datasheet, SN74AC8541QDGSRQ1 pinout, SN74AC8541QDGSRQ1 application, or SN74AC8541QDGSRQ1 equivalent, key selection criteria include Schmitt-trigger noise immunity, dual independent 3-state control, wettable-flank VQFN-20 packaging for AOI-compatible solder joint inspection, and automotive-grade thermal performance up to +125°C.
Technical Context
This device implements eight independent CMOS buffers with hysteresis-enabled Schmitt-trigger inputs (ΔVT = 0.5V min at 5V), enabling robust operation with slow-rising or noisy signals in automotive environments. Each channel features balanced push-pull outputs capable of sourcing/sinking equal current.
Output state is controlled by two active-low enable pins (OE1 and OE2) requiring both to be low for active drive; any high enables high-impedance mode. The architecture supports simultaneous 3-state control across all eight channels while maintaining rail-to-rail input voltage tolerance up to 6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 6V - supports wide-input automotive power rails including 3.3V, 5V, and legacy 1.8V logic domains. |
| Max Propagation Delay | 6ns at 5V/50pF - ensures timing-critical signal routing in ADAS sensor interfaces and infotainment data paths. |
| Output Drive Strength | ±24mA continuous at 5V - sufficient to drive multiple CMOS loads or terminate 50Ω transmission lines without external buffering. |
| Input Hysteresis (ΔVT) | 0.5V minimum at 5V - rejects >500mV peak-to-peak noise on slow-switching signals like door latch sensors or HVAC controls. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and cabin-mounted ECUs. |
| ESD Rating | HBM ±2000V, CDM ±1000V - meets automotive system-level ESD immunity requirements without additional protection circuitry. |
| Package Type | VQFN-20 (RKS), 4.5mm × 2.5mm with wettable flanks - enables automated optical inspection of solder joints in high-reliability SMT assembly. |
Pinout & Package
VQFN-20 (RKS) package with 0.5mm pitch, 4.5mm × 2.5mm body size, and exposed thermal pad (connectable to GND or left floating). Wettable flanks support AOI-compatible side-fillet formation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1, OE2 | Active-low 3-state enable inputs | Both must be low to enable outputs; provides redundant or split-control capability for fault-tolerant designs. |
| A1–A8 | Independent Schmitt-trigger inputs | Accept 0–6V inputs; tolerate slow edges and noise without oscillation or excessive dynamic current. |
| Y1–Y8 | CMOS push-pull outputs with 3-state | Drive high/low actively when enabled; enter high-Z when either OE is high - prevents bus contention. |
| VCC | Positive supply | Supplies all internal logic and output drivers; requires local 100nF decoupling per TI layout guidelines. |
| GND | Ground reference | Return path for all output sink current and supply leakage; connects to thermal pad for improved thermal dissipation. |
| Thermal Pad | Exposed copper pad (RKS only) | Enhances thermal transfer to PCB; may be connected to GND plane for electrical and thermal benefit. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs with 0.5V hysteresis | Eliminates need for external RC filtering on noisy switch inputs (e.g., seat position sensors) while reducing dynamic power vs. standard CMOS. |
| Dual independent 3-state enables (OE1/OE2) | Enables fail-safe output disable via redundant control paths - critical for ISO 26262-compliant safety mechanisms. |
| Wettable-flank VQFN-20 package | Supports automated optical inspection of solder fillets, improving manufacturing yield and field reliability in automotive production. |
| Rail-to-rail input voltage tolerance (0–6V) | Allows direct interfacing with mixed-voltage subsystems (e.g., 12V sensor analog front-ends via level-shifting resistors) without clamping diodes. |
| ±75mA short-burst output capability | Handles transient load demands such as LED strobe drivers or solenoid precharge without violating SOA limits. |
Applications
| Body Control Module Signal Conditioning | ADAS Sensor Data Isolation |
|---|---|
|
Use Scenario: Buffering and debouncing door lock/unlock switch signals subject to EMI and mechanical bounce in vehicle door modules. IC Role / Device Role / Timing Role: Octal Schmitt-trigger buffer with dual 3-state control isolates microcontroller GPIOs from noisy mechanical contacts while enabling software-controlled bus release. Use Value: Eliminates external RC filters and reduces firmware debounce overhead; hysteresis rejects >500mV noise spikes common in 12V automotive harnesses. |
Use Scenario: Driving LVDS or parallel camera sensor data lines from image signal processors in surround-view systems. IC Role / Device Role / Timing Role: High-speed octal driver with 6ns tpd and 50Ω line driving capability conditions pixel clock and data signals before transmission over flex cables. Use Value: Maintains signal integrity across 15cm+ traces without external termination; ±24mA drive sustains edge rates into capacitive loads up to 50pF. |
| Infotainment Display Interface | Powertrain ECU Reset Coordination |
|
Use Scenario: Enabling/disabling backlight PWM signals and touch controller I²C lines during display sleep/wake transitions in head units. IC Role / Device Role / Timing Role: 3-state octal buffer synchronizes peripheral power sequencing using OE1/OE2 to gate multiple signal groups with single MCU pins. Use Value: Prevents bus contention during partial system resets; rail-to-rail input allows direct connection to 3.3V or 5V display controllers without level shifters. |
Use Scenario: Holding CAN transceiver standby pins and fuel injector driver enable lines in known states during MCU reset sequences in engine control units. IC Role / Device Role / Timing Role: Schmitt-trigger octal buffer with guaranteed high-Z on OE assertion maintains safe default states during boot-up and brown-out recovery. Use Value: Dual OE inputs allow independent control of safety-critical vs. non-critical peripherals; −40°C to +125°C operation ensures functionality during cold cranking and hot soak. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC8T245RHLR | Translating 8-bit bus switch (1.65–5.5V), no Schmitt inputs, higher ICC (40µA vs. 20µA), 3.5ns tpd at 3.3V | Used where voltage translation between 1.8V/3.3V domains is required; unsuitable for noisy switch debouncing due to lack of hysteresis | Select when bidirectional level shifting is needed; avoid for automotive switch interfaces requiring noise immunity |
| SN74AHC541QPWRQ1 | Non-Schmitt octal buffer, same AEC-Q100 Grade 1 rating, 7.5ns tpd at 5V, ±8mA drive at 5V (vs. ±24mA) | Lower drive strength limits use to light-load applications; lacks hysteresis for noise-prone environments | Choose for cost-sensitive, low-noise subsystems where Schmitt-triggering is unnecessary; verify noise margin in final layout |
Compared with SN74AC8541QDGSRQ1, SN74LVC8T245RHLR adds voltage translation but removes Schmitt-triggering and automotive thermal margin, while SN74AHC541QPWRQ1 retains AEC-Q100 qualification but sacrifices noise immunity and output drive - making SN74AC8541QDGSRQ1 optimal for high-noise, high-drive automotive signal conditioning.
Availability
SN74AC8541QDGSRQ1 is available at Aetrix Electronics and suitable for automotive body control modules, ADAS sensor interfaces, infotainment display subsystems, and powertrain ECU reset coordination requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AC8541QDGSRQ1 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 leader specializing in analog, embedded processing, and automotive ICs, with decades of experience delivering AEC-Q100-qualified components for safety-critical vehicle systems.
The SN74AC8541QDGSRQ1 belongs to TI's automotive logic portfolio designed specifically for signal integrity, noise immunity, and functional safety in body electronics, chassis, and ADAS subsystems - emphasizing robustness over raw speed.
FAQ
What is the maximum operating temperature range for the SN74AC8541QDGSRQ1?
The SN74AC8541QDGSRQ1 is qualified per AEC-Q100 Grade 1 with an operating free-air temperature range of −40°C to +125°C. This rating is validated across all electrical parameters in the datasheet, including propagation delay, output drive, and input threshold stability, ensuring reliable operation in under-hood and cabin-mounted automotive ECUs.
Does the SN74AC8541QDGSRQ1 require external pull-up or pull-down resistors on unused inputs?
Yes - all unused inputs of the SN74AC8541QDGSRQ1 must be terminated to either VCC or GND to prevent floating nodes and undefined logic states. A 10kΩ resistor is recommended per TI application guidance, as it balances leakage current limits, transition rate control, and power consumption while maintaining Schmitt-trigger noise rejection.
Can both OE1 and OE2 be used independently to control different subsets of outputs on the SN74AC8541QDGSRQ1?
No - OE1 and OE2 are logically ANDed internally; both must be low to enable any output. They do not provide per-channel or group-based control. This dual-enable architecture is designed for redundancy and fault detection, not independent output partitioning. For segmented control, discrete buffers or a different part number would be required.
What is the purpose of the thermal pad on the RKS (VQFN-20) package of the SN74AC8541QDGSRQ1?
The exposed thermal pad on the SN74AC8541QDGSRQ1's RKS package enhances heat dissipation from the silicon die to the PCB ground plane. TI recommends connecting it to GND for both thermal and electrical benefits, though it may be left floating if board layout constraints prohibit grounding - doing so increases junction-to-board thermal resistance by ~30%.
How does the Schmitt-trigger input hysteresis of the SN74AC8541QDGSRQ1 improve noise immunity in automotive applications?
The SN74AC8541QDGSRQ1 provides ≥0.5V hysteresis (ΔVT) at 5V supply, meaning input signals must swing at least 500mV peak-to-peak to toggle output state. This rejects common-mode noise, contact bounce, and EMI-induced glitches on long harness runs - critical for reliable operation with door switches, seat sensors, and HVAC controls in electrically noisy vehicle environments.
SN74AC8541QDGSRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-TFSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.5V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VSSOP
SN74AC8541QDGSRQ1 FAQ
1.How can I place an order for SN74AC8541QDGSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AC8541QDGSRQ1 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 SN74AC8541QDGSRQ1 reliable?
The price and inventory of SN74AC8541QDGSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC8541QDGSRQ1 is usually 5 days.
3.What payment methods are accepted for SN74AC8541QDGSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC8541QDGSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AC8541QDGSRQ1?
SN74AC8541QDGSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AC8541QDGSRQ1 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 SN74AC8541QDGSRQ1?
For technical support, including SN74AC8541QDGSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC8541QDGSRQ1 requirements.
6.How does Aetrix verify that SN74AC8541QDGSRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74AC8541QDGSRQ1 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 SN74AC8541QDGSRQ1 meets industry standards.
7.What is the process for return or replacement of SN74AC8541QDGSRQ1?
All SN74AC8541QDGSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC8541QDGSRQ1, 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 SN74AC8541QDGSRQ1 part is unused and in its original packaging.
Return procedure for SN74AC8541QDGSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AC8541QDGSRQ1 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
