SN74HC541DWRIn StockTexas Instruments
SN74HC541DWR is a 20-pin octal buffer/line driver with 3-state outputs from Texas Instruments. Key specs: 2V–6V supply, 25 MHz, SOIC-20W. From $0.37 in stock, 1 pc MOQ, ships worldwide.
- Manufacturer
- Texas Instruments
- Package
- SOIC-20-Wide
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74HC541DWR Datasheet PDF
- Category
- logic-buffers-drivers
- Price
- From $0.2956(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal buffer/line driver with 3-state outputs for high-impedance bus isolation
- Wide supply voltage range 2V–6V, compatible with 3.3V and 5V logic systems
- 25 MHz typical propagation speed with 8 ns typical tpd at 5V
- Low power HC CMOS technology with TTL-compatible inputs
- SOIC-20 Wide (DWR) package for easy PCB layout and automated assembly
Applications
Commonly used in microcontroller address/data bus buffering, FPGA I/O expansion, and memory interface circuits where bidirectional isolation is needed. The 3-state outputs allow multiple drivers to share a common bus without contention. Also widely applied in industrial control panels and communication interface boards requiring 5V logic drive strength.
Specifications
| Supply Voltage | 2 – 6V |
| Propagation Delay (tpd) | 8ns |
| Output Drive Current (IOH) | -7.8mA |
| Operating Temperature | -40 to +85°C |
| Number of Channels | 8 |
| Logic Family | HC CMOS |
| Interface | 3-State Bus |
| Package | SOIC-20-Wide |
Compliance & Regulatory
| RoHS Status | Compliant |
| Moisture Sensitivity Level | MSL MSL1 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74HC541DWR:
Higher-speed AHCT upgrade with TTL-compatible inputs, same SOIC-20W footprint, suitable for 3.3V/5V mixed-signal applications
Frequently Asked Questions
How does the SN74HC541DWR differ from the SN74HC244?
Both are octal buffers, but the SN74HC541DWR has two separate active-low output-enable pins (OE1, OE2) that can disable all 8 outputs to high-impedance state, making it ideal for bus isolation. The SN74HC244 uses the same pinout family but has separate 4-bit enable groupings. The HC541 also features non-inverting buffers with a flow-through pinout (inputs on one side, outputs on the other) simplifying PCB routing.
Can the SN74HC541DWR drive 3.3V and 5V systems simultaneously?
Yes. With a 3.3V supply (VCC = 3.3V), output levels meet 3.3V logic thresholds, and TTL-compatible inputs accept signals from 5V sources as long as VIH is within spec. For mixed-voltage designs, pair with a level shifter or use separate VCC domains. Maximum VCC is 6V, so the device is inherently 5V tolerant when powered at 5V.
What package does the DWR suffix indicate and what are the PCB footprint dimensions?
The DWR suffix indicates a 20-pin SOIC Wide-Body (SOIC-20W) package with 7.5 mm body width and 1.27 mm pin pitch. The land pattern follows JEDEC MS-013 standard. Body length is 12.8 mm and the package height is 2.65 mm maximum, making it suitable for space-constrained designs.
Which components are compatible drop-in alternatives to the SN74HC541DWR?
Pin-compatible alternatives include the 74HCT541 series (5V-optimized TTL-input variant), Nexperia 74HC541D,652 (SOIC-20W), and ON Semiconductor MC74HC541ADW. For higher drive strength consider the SN74AHCT541 (AHCT series, faster with TTL inputs) or SN74LVC541A for 1.65V–3.6V low-voltage applications.
How to calculate power dissipation for the SN74HC541DWR in a 5V bus design?
Static ICC at 5V is typically 80 uA max. Dynamic power Pd = VCC x C_L x f x N_outputs. For 8 outputs driving 50 pF at 10 MHz at 5V: Pd = 5V x 50 pF x 10 MHz x 8 = 20 mW. Add static power (5V x 80 uA = 0.4 mW) for a total of approximately 20.4 mW, well within the package thermal limit of 600 mW at 25°C.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.7390 | $0.74 |
| 25+ | $0.6280 | $15.70 |
| 100+ | $0.5080 | $50.80 |
| 101+ | $0.5000 | $50.50 |
| 136+ | $0.3695 | $50.25 |
| 542+ | $0.2956 | $160.22 |
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