SN74ALS541-1DBRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74ALS541-1DBRG4 is an octal buffer and line driver with 3-state outputs, featuring dual active-low output enables, 48 mA sink current, and 50 pF load capacitance. Available in 20-pin SOIC package with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ALS541-1DBRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74ALS541-1DBRG4?
- Octal 3-state buffers with dual active-low output enable for flexible bus control
- High sink current of 48 mA (IOL) supports demanding bus-driving applications
- ALS-family logic with 50 pF load capacitance rating for reliable signal integrity at 5V
- 20-pin SOIC (DBRG4) package enables compact PCB layouts with surface-mount assembly
What is SN74ALS541-1DBRG4 used for?
The SN74ALS541-1DBRG4 is well suited for driving high-capacitance data buses in industrial control systems, memory interfaces, and microprocessor peripherals where 5 V logic levels are required. Its dual output-enable inputs make it ideal for bidirectional bus arbitration circuits and multi-master memory systems. The unidirectional 8-bit architecture also serves address and data buffering in backplane designs where signal integrity over 50 pF loads is critical.
What are the specifications of SN74ALS541-1DBRG4?
| YTEOL | 0 |
| Additional Feature | WITH DUAL OUTPUT ENABLE |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | ALS |
| JESD-30 Code | R-PDSO-G20 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.048A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SSOP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 25mA |
| Prop. Delay@Nom-Sup | 14ns |
| Propagation Delay (tpd) | 14ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74ALS541-1DBRG4 datasheet?
SN74ALS541-1DBRG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74ALS541-1DBRG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum output sink current rating of the SN74ALS541-1DBRG4?
The SN74ALS541-1DBRG4 supports a maximum output low sink current (IOL) of 48 mA per output. This high sink capability makes the device suitable for driving heavily loaded bus lines, such as those with multiple receivers or long PCB traces presenting up to 50 pF capacitance.
How do the dual output-enable inputs work in the SN74ALS541-1DBRG4 and why does this matter for bus design?
The SN74ALS541-1DBRG4 has two independent active-low output-enable pins (OE1 and OE2); both must be asserted low simultaneously to enable the 8 outputs. This arrangement allows a single device to gate bus access from two different control sources — useful in multi-master or handshake-based backplane architectures operating at 5 V supply.
When is the SN74ALS541-1DBRG4 a better fit than an equivalent 74HC541 octal buffer?
The ALS variant operates at 5 V with guaranteed IOL of 48 mA and propagation delays typically under 11 ns, making it preferable to 74HC541 in legacy TTL-compatible systems that need higher drive strength or faster switching. The 74HC541 offers lower quiescent power but a lower IOL of around 25 mA at 5 V, so the ALS device is chosen when bus loading exceeds 25 mA or when TTL input threshold compatibility is required.
What PCB footprint does the DBRG4 package suffix correspond to, and how many pins does it have?
The DBRG4 suffix denotes a 20-pin Small Outline IC (SOIC) package with a 1.27 mm (50 mil) pin pitch and a body width of approximately 7.5 mm. The 20-pin SOIC footprint is a widely supported surface-mount land pattern compatible with standard IPC-7351 reflow soldering processes.
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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.
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