My Inquiry
My Account
Texas Instruments SN74AHCT541NSR
- Part No.:
- SN74AHCT541NSR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74AHCT541NSR.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,244
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74AHCT541NSR from Texas Instruments is an octal non-inverting buffer/driver with 3-state outputs, designed for bus line driving and memory address register buffering in 5-V digital systems. It features TTL-compatible inputs, ±8 mA output drive capability, 6.5 ns typical propagation delay (CL = 15 pF), and operates across –40°C to 125°C.
For engineers reviewing the SN74AHCT541NSR datasheet, SN74AHCT541NSR pinout, SN74AHCT541NSR application, or SN74AHCT541NSR equivalent, key selection considerations include its dual 4-channel 3-state control (OE1/OE2), SOIC-20 package compatibility, industrial temperature range, and strict 5-V supply operation with no mixed-voltage interface support.
Technical Context
The SN74AHCT541NSR implements two independent 4-bit 3-state output groups controlled by OE1 and OE2 - each a 2-input AND gate with active-low enables. When either enable is high, all eight outputs enter high-impedance state; when both are low, outputs replicate inputs non-inverted.
Its logic family is AHCT (Advanced High-Speed CMOS TTL-compatible), ensuring interoperability with legacy TTL signal levels while maintaining CMOS power efficiency. Input thresholds (VIH = 2 V, VIL = 0.8 V) and output drive (VOH ≥ 3.8 V at IOH = –8 mA, VOL ≤ 0.44 V at IOL = 8 mA) are fully specified at VCC = 4.5–5.5 V and TA = –40°C to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 4.5 V to 5.5 V - requires stable 5-V rail; not 3.3-V tolerant |
| Propagation Delay (tPLH/tPHL) | 6.5 ns max (CL = 15 pF) - supports >100 MHz bus toggle rates in short traces |
| Output Drive Strength | ±8 mA - sufficient to drive standard 50-Ω transmission lines or 10 TTL loads |
| Input Voltage Compatibility | TTL-level: VIH ≥ 2 V, VIL ≤ 0.8 V - directly interfaces 74LS/74F logic without level shifters |
| ESD Robustness | HBM ±2000 V, CDM ±1000 V - meets JEDEC JESD22-A114 & JESD22-C101 for production handling |
| Operating Temperature | –40°C to +125°C - qualified for industrial and extended-temperature embedded control |
| Power Dissipation Capacitance | 12 pF - enables accurate dynamic power estimation at 1 MHz switching |
Pinout & Package
SOP-20 (NS) package: 12.80 mm × 7.50 mm body, 24.4 mm × 24.4 mm tape-and-reel box footprint, RoHS-compliant NiPdAu lead finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low 3-state enables - independently control Y1–Y4 (OE1) and Y5–Y8 (OE2) |
| 2–9 | A1–A8 | Non-inverting data inputs - TTL-compatible; must be tied to VCC/GND if unused |
| 10 | GND | Digital ground reference - requires low-inductance connection to system ground plane |
| 11–18 | Y1–Y8 | 3-state buffered outputs - high-impedance when OE1 or OE2 = HIGH; otherwise Yn = An |
| 20 | VCC | 5-V power supply - requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Two independent 4-bit 3-state groups | Enables selective bus isolation - e.g., separate control of address vs. data segments |
| TTL-compatible input thresholds | Eliminates need for external level-shifting circuitry when interfacing with legacy 74LS logic |
| High noise immunity | Input hysteresis and 0.4 V noise margin (VIL = 0.8 V, VIH = 2.0 V) suppress false triggering |
| Low quiescent current | ICC ≤ 40 µA max - suitable for low-power standby modes in always-on industrial controllers |
| Robust latch-up immunity | Exceeds 250 mA per JESD17 - prevents destructive latch-up during transient overvoltage events |
Applications
| Memory Address Buffering | Parallel Bus Isolation |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or EPROM in an industrial PLC. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control ensures clean address propagation and prevents bus contention during DMA cycles. Use Value: 6.5 ns propagation delay and ±8 mA drive maintain setup/hold timing margins across 10 cm PCB traces at 25 MHz. | Use Scenario: Isolating two 8-bit peripheral buses (e.g., UART + SPI peripherals) sharing a common data path in a factory HMI. IC Role / Device Role / Timing Role: Dual OE-controlled 4-bit groups allow independent enable/disable of bus segments without software coordination. Use Value: Independent OE1/OE2 pins eliminate need for external logic gates or additional GPIOs to manage bus arbitration. |
| Legacy System Interface | Industrial I/O Expansion |
Use Scenario: Interfacing a modern ARM-based controller (5-V tolerant GPIO) to legacy 74LS-based backplane logic in test equipment. IC Role / Device Role / Timing Role: Level translator and fanout buffer - accepts LS TTL outputs and drives multiple LS inputs with guaranteed VIH/VIL margins. Use Value: TTL-compatible inputs eliminate external pull-ups; 10-TTL-load drive capability replaces discrete transistor arrays. | Use Scenario: Expanding GPIO count for sensor monitoring in a DIN-rail mounted RTU, where space-constrained SOP-20 fits tight board layouts. IC Role / Device Role / Timing Role: Output expander with 3-state capability - allows shared bus access among multiple sensor modules via OE control. Use Value: SOP-20 package (12.8 × 7.5 mm) provides 8 buffered outputs in <100 mm² area, reducing BOM count vs. dual 74AHCT244 solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT244NSR | Octal buffer with separate A→Y and B→Y directions; identical VCC, timing, and package | Unidirectional flow only; lacks independent OE grouping - all 4 Y outputs share one OE | Choose when bidirectional bus control is unnecessary and simpler enable logic suffices |
| SN74LVC541APWR | 3.3-V supply only (1.65–3.6 V); lower drive (±24 mA), faster tPD (3.5 ns), different input thresholds | Not pin-compatible; requires level translation for 5-V systems; unsuitable for direct TTL replacement | Choose only for new 3.3-V designs prioritizing speed and lower power - not a drop-in replacement |
Compared with SN74AHCT244NSR, SN74AHCT541NSR offers finer-grained bus control via dual OE pins; compared with SN74LVC541APWR, it maintains full 5-V TTL interoperability but trades off speed and voltage flexibility for legacy compatibility.
Availability
SN74AHCT541NSR is available at Aetrix Electronics and suitable for industrial control systems, legacy equipment upgrades, and embedded bus interface designs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for SN74AHCT541NSR 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 logic ICs, with decades of expertise in industrial-grade interface solutions.
The SN74AHCT541NSR belongs to TI's legacy 74AHCT logic family, engineered specifically for robust 5-V bus interfacing in harsh environments - emphasizing noise immunity, wide temperature operation, and TTL compatibility over ultra-high speed.
FAQ
What is the maximum operating temperature for SN74AHCT541NSR?
The SN74AHCT541NSR is rated for continuous operation from –40°C to +125°C ambient temperature. This industrial-grade specification is validated per TI's production testing and aligns with the recommended operating conditions table in the SCLS269Q datasheet. The SOP-20 package's thermal resistance (RθJA = 60°C/W) supports reliable performance at full temperature range under typical PCB copper pour conditions.
Does SN74AHCT541NSR support 3.3-V input logic levels?
No, SN74AHCT541NSR does not reliably recognize 3.3-V logic levels as valid inputs. Its VIH minimum is 2.0 V and VIL maximum is 0.8 V at VCC = 4.5–5.5 V - optimized for TTL (0.8 V/2.0 V) and 5-V CMOS signaling. Applying 3.3-V signals may result in marginal or undefined switching behavior; use SN74LVC541 or level translators for mixed-voltage systems.
Can SN74AHCT541NSR outputs drive a 50-Ω transmission line directly?
Yes, SN74AHCT541NSR outputs can drive a 50-Ω load with acceptable signal integrity. At IOL = 8 mA and VOL ≤ 0.44 V, the effective output impedance is ~55 Ω, closely matching 50-Ω lines. For best results, place a series damping resistor (e.g., 33 Ω) near the driver output, as recommended in TI's layout guidelines (Figure 7-1), to suppress reflections on longer traces.
Is SN74AHCT541NSR pin-compatible with SN74AHCT541N (PDIP-20)?
Yes, SN74AHCT541NSR (SOP-20) shares identical pin numbering, function mapping, and electrical specifications with SN74AHCT541N (PDIP-20). Both follow the standard 20-pin logic IC pinout: OE1 (1), A1 (2), ..., VCC (20). Mechanical dimensions differ, but PCB layout adaptation is limited to footprint change - no netlist or schematic modification required.
What happens if both OE1 and OE2 are left floating on SN74AHCT541NSR?
If OE1 or OE2 floats on SN74AHCT541NSR, the corresponding output group enters an undefined state due to internal bias uncertainty - potentially causing partial or intermittent 3-state behavior, increased ICC, or bus contention. TI explicitly requires unused inputs to be tied to VCC or GND; for OE pins, tie to VCC via a pullup resistor (e.g., 10 kΩ) to guarantee high-impedance startup and power-down safety.
SN74AHCT541NSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 20-SOIC (0.209", 5.30mm 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:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
SN74AHCT541NSR FAQ
1.How can I place an order for SN74AHCT541NSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT541NSR 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 SN74AHCT541NSR reliable?
The price and inventory of SN74AHCT541NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT541NSR is usually 5 days.
3.What payment methods are accepted for SN74AHCT541NSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT541NSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHCT541NSR?
SN74AHCT541NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT541NSR 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 SN74AHCT541NSR?
For technical support, including SN74AHCT541NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT541NSR requirements.
6.How does Aetrix verify that SN74AHCT541NSR is sourced from the original manufacturer or authorized distributors?
All SN74AHCT541NSR 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 SN74AHCT541NSR meets industry standards.
7.What is the process for return or replacement of SN74AHCT541NSR?
All SN74AHCT541NSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT541NSR, 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 SN74AHCT541NSR part is unused and in its original packaging.
Return procedure for SN74AHCT541NSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AHCT541NSR 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…
