SN74HCS541PWR - Octal Buffer Schmitt 3-State TSSOP-20 | TI
MPN: SN74HCS541PWR ✓ פעילSN74HCS541PWR סקירה
What is an octal buffer/line driver? It is a digital logic IC providing eight independent buffer channels capable of driving bus lines or long PCB traces. The 3-state outputs allow each device to release the bus into a high-impedance state, enabling multi-device bus sharing, while Schmitt-trigger inputs add hysteresis that converts slow or noisy input edges into clean logic transitions. The SN74HCS541 belongs to the HCS (High-speed CMOS with Schmitt-trigger) logic family, combining CMOS low power with TTL-compatible drive.
Key features include the 2 V to 6 V operating range for 3.3 V and 5 V mixed-voltage systems, typical 0.4 V input hysteresis at 4.5 V for superior noise immunity, dual active-low output enables (OE1 and OE2, both must be low to activate outputs), and only 20 uA typical quiescent current at 6 V. Outputs sink or source up to 6 mA at 4.5 V, suitable for driving LEDs, relays, or additional logic inputs.
Fabricated in silicon-gate CMOS, the device balances switching speed with low power dissipation. The flow-through pinout places inputs on one side and outputs on the opposite side, simplifying PCB routing and reducing crosstalk in bus-oriented layouts.
Typical applications include microcontroller bus buffering, memory address/data line driving, sensor signal conditioning, and interfacing 3.3 V logic to 5 V domains in industrial automation and automotive-adjacent systems.
Design tip: control the OE pins carefully to avoid bus contention, place 0.1 uF decoupling capacitors close to VCC/GND, and keep input rise times below 500 ns at 2 V and 200 ns at 6 V for best performance.
חלופות תחליף ישיר עבור SN74HCS541PWR — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם SN74HCS541PWR (אותו גורם צורה וטביעת רגל) — שונים ב Function, Output Enable, Output Type, Packaging.
SN74HCS541QPWRQ1
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←SN74HC541PWR
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
SN74HCS595PWR
⚡ אותה מארזה ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
74HC541PW,112
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
SN74HCS541PWR דירוגים מרביים ומאפיינים חשמליים
| פונקציה | Octal buffer / line driver |
| Input Type | Schmitt-trigger |
| Logic Family | HCS (High-speed CMOS Schmitt) |
| ערוצים | 8-bit per element, 1 element |
| סוג פלט | 3-state, non-inverting |
| Supply Voltage Range | 2 V to 6 V |
| Input Hysteresis | 0.4 V typical at 4.5 V |
| Output Drive Current | 6 mA at 4.5 V (sink and source) |
| זרם מנוחה | 20 uA typical at 6 V |
| Output Enable | OE1 and OE2, both active-low |
| טמפרטורת פעולה | -40C to +125C |
| מארז | 20-TSSOP (PW) |
| סוג הרכבה | Surface Mount |
| Pinout Style | Flow-through |
| סטטוס RoHS | Compliant |
| Packaging | Tape & Reel (PWR suffix) |
תצורת פינים של SN74HCS541PWR
| פין 1 | OE1 — Output enable 1 (active low) |
| פין 2 | A1 — Data input 1 |
| פין 3 | A2 — Data input 2 |
| פין 4 | A3 — Data input 3 |
| פין 5 | A4 — Data input 4 |
| פין 6 | A5 — Data input 5 |
| פין 7 | A6 — Data input 6 |
| פין 8 | A7 — Data input 7 |
| פין 9 | A8 — Data input 8 |
| פין 10 | GND — Ground |
| פין 11 | Y1 — Buffered output 1 (3-state) |
| פין 12 | Y2 — Buffered output 2 (3-state) |
| פין 13 | Y3 — Buffered output 3 (3-state) |
| פין 14 | Y4 — Buffered output 4 (3-state) |
| פין 15 | Y5 — Buffered output 5 (3-state) |
| פין 16 | Y6 — Buffered output 6 (3-state) |
| פין 17 | Y7 — Buffered output 7 (3-state) |
| פין 18 | Y8 — Buffered output 8 (3-state) |
| פין 19 | OE2 — Output enable 2 (active low) |
| פין 20 | VCC — Supply voltage, 2 V to 6 V |
יישומים טיפוסיים
SN74HCS541PWR מתאים עבור 6 יישוםs: Microcontroller Bus Buffering, Memory Address and Data Line Driving, Slow Signal Conditioning in Industrial Automation, 3.3 V to 5 V Logic Domain Interfacing, LED and Relay Drive Strobing, Automotive-Adjacent Control Systems.
Microcontroller Bus Buffering
The SN74HCS541PWR buffers eight address or data lines between an MCU and shared peripherals. Its 6 mA drive at 4.5 V strengthens weakened signals on long PCB traces, while the dual active-low enables let a second device share the same bus via high-impedance outputs. Schmitt-trigger inputs tolerate ringing on longer interconnects. Place 0.1 uF decoupling close to VCC and use the flow-through pinout to keep traces short and crosstalk low.
מומלץ
Memory Address and Data Line Driving
When interfacing parallel memories or external latches, the SN74HCS541PWR drives address lines from a controller with clean, fast edges. The 2 V to 6 V range supports both 3.3 V and 5 V memory systems. Outputs default to high-impedance when either OE pin is high, enabling power-up tri-state during MCU reset. Evaluate propagation delay budget at your operating voltage when adding buffers to address paths.
מומלץ
Slow Signal Conditioning in Industrial Automation
Industrial sensor outputs, RC timers, and optocoupler outputs often have rise times in the microseconds - too slow for standard CMOS inputs, which can oscillate in the threshold region. The SN74HCS541PWR's Schmitt-trigger inputs, with 0.4 V typical hysteresis at 4.5 V, snap these edges into clean logic levels while the 3-state outputs let one processor at a time read the conditioned lines. Keep rise times within the datasheet limits and decouple VCC locally.
מומלץ
3.3 V to 5 V Logic Domain Interfacing
Operating up to 6 V, the SN74HCS541PWR accepts 3.3 V logic levels from a low-voltage MCU and drives 5 V logic or loads. Its CMOS thresholds scale with VCC, and Schmitt hysteresis remains effective across the range. Typical use is translating control or data lines from a 3.3 V processor into 5 V industrial I/O or legacy TTL subsystems, using the 3-state outputs for bus sharing during handoff.
מומלץ
LED and Relay Drive Strobing
With 6 mA sink/source capability at 4.5 V per output, the SN74HCS541PWR directly drives LED indicators through resistors or small transistor drivers for relays. The eight independent channels with a common enable pair allow banked strobing: both OE pins low to enable the group, high to blank all outputs simultaneously. Schmitt inputs ensure clean strobe edges from noisy controller lines.
מומלץ
Automotive-Adjacent Control Systems
For non-safety automotive-adjacent equipment such as test fixtures and factory controllers in vehicle plants, the standard SN74HCS541PWR works to -40C to +125C. When AEC-Q100 qualification is required, the SN74HCS541QPWRQ1 drops into the same footprint with identical function. The wide 2 V to 6 V range tolerates regulated 5 V rails with headroom for transient sag, and the 20 uA quiescent current suits low-power standby nodes.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור SN74HCS541PWR — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | SN74HCS541QPWRQ1 | SN74HC541PWR | 74HC541PW,112 | MC74HC541ADWG |
|---|---|---|---|---|---|
| Package | 20-TSSOP (PW) | 20-TSSOP (PW) - same | 20-TSSOP (PW) - same | 20-TSSOP (PW) - same | SOIC-20 wide - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors | Microchip Technology |
| Schmitt-Trigger Inputs | Yes (0.4 V typ hysteresis at 4.5 V) | Yes | No | No | No |
| Supply Voltage Range | 2 V to 6 V | 2 V to 6 V | 2 V to 6 V | 2 V to 6 V | 2 V to 6 V |
| Output Drive | 6 mA at 4.5 V | 6 mA at 4.5 V | 6 mA at 4.5 V | 6 mA at 4.5 V | 6 mA at 4.5 V |
| Automotive Grade | No | Yes (AEC-Q100) | No | No | No |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +85C |
מבדילים עיקריים
- Schmitt-trigger inputs for noisy/slow signals (לעומתSN74HC541PWR)
- Automotive drop-in variant available (לעומתSN74HCS541QPWRQ1)
- Cross-brand equivalents lack hysteresis (לעומת74HC541PW,112)
הערות תכנון
Never enable outputs while another bus driver is active - bus contention can exceed the absolute maximum output current. Sequence OE1/OE2 so a new driver enables only after the previous driver has tri-stated. During MCU reset, hold both OE pins high (pull-ups recommended) so outputs remain high-impedance until the controller is ready.
Place a 0.1 uF ceramic decoupling capacitor within 3 mm of the VCC (pin 20) and GND (pin 10) pins, with an additional bulk 1 uF to 10 uF per board region. The flow-through pinout lets inputs and outputs route on opposite board sides - keep input and output traces separated to reduce crosstalk on parallel bus lines.
Respect the maximum recommended input transition (rise/fall) times - roughly 500 ns at 2 V and 200 ns at 6 V per the HCS family datasheet - unless using the Schmitt-trigger inputs of this HCS version. Unused inputs must not float: tie them to VCC or GND to avoid increased quiescent current and oscillation.
מידע על תאימות
RoHS compliant per TI product page. Use SN74HCS541QPWRQ1 for AEC-Q100 qualified automotive designs.
