My Inquiry
My Account
Texas Instruments SN74ALS541DBRG4
- Part No.:
- SN74ALS541DBRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74ALS541DBRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,729
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ALS541DBRG4 from Texas Instruments is an octal buffer/line driver with 3-state outputs, designed for bus interfacing and memory address register buffering in TTL-compatible digital systems. It features true (non-inverting) data flow, dual 3-state enable inputs (OE1/OE2), pnp input structure for reduced DC loading, and operates at 4.5–5.5 V supply. Its data flowthrough pinout places all eight inputs on one side and outputs on the opposite side to simplify PCB layout.
For engineers reviewing the SN74ALS541DBRG4 datasheet, SN74ALS541DBRG4 pinout, SN74ALS541DBRG4 application, or SN74ALS541DBRG4 equivalent, key selection criteria include 3-state bus driving capability, 24 mA low-level output current (IOL), 12 mA high-level output current (IOH), propagation delays under 14 ns, and compatibility with legacy ALS logic families in industrial control and embedded memory subsystems.
Technical Context
This device implements a dual-NOR 3-state control gate: either OE1 or OE2 high forces all eight Y outputs into high-impedance mode. Inputs use pnp transistor structures to minimize DC loading on upstream drivers, improving fan-out in dense TTL systems.
The SN74ALS541DBRG4 delivers true (non-inverted) logic transfer from A1–A8 to Y1–Y8, distinguishing it from the inverted SN74ALS540. Its SSOP-20 (DB) package supports surface-mount assembly with 0.65 mm lead pitch and 7.4 mm × 5.3 mm body dimensions, optimized for space-constrained board layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across standard TTL supply tolerances. |
| IOL (max) | 24 mA - Supports direct driving of multiple TTL loads or moderate-capacitance buses without external buffers. |
| IOH (max) | –12 mA - Sustains reliable high-level drive into typical TTL input loads. |
| tPLH / tPHL | 4–14 ns - Enables reliable operation in 25 MHz+ address/data bus timing windows. |
| tPZH / tPZL | 5–20 ns - Provides predictable 3-state enable/disable timing for bus arbitration and shared resource access. |
| Input Structure | pnp-based - Reduces input DC current draw to ≤0.2 mA, increasing effective fan-out in cascaded ALS logic chains. |
| Output Type | 3-state totem-pole - Allows bidirectional bus sharing with other drivers without contention or pull-up resistors. |
Pinout & Package
SN74ALS541DBRG4 is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65 mm lead pitch, 7.4 mm × 5.3 mm body size, and 2.0 mm max height per JEDEC MO-150. The package is RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 Inputs | True logic inputs accepting TTL-level signals; pnp structure minimizes DC loading on source gates. |
| 9 | GND | Ground reference for all internal circuitry and output stage return path. |
| 10 | VCC | Positive supply rail (4.5–5.5 V); powers internal logic and output drivers. |
| 11, 12 | OE1, OE2 | Active-low 3-state enables; NOR logic means either high disables all outputs (high-Z). |
| 13–20 | Y1–Y8 Outputs | True-buffered, 3-state totem-pole outputs capable of sinking 24 mA or sourcing 12 mA. |
Key Features
| Feature | Design Value |
|---|---|
| Data flowthrough pinout | Inputs (A1–A8) on left side, outputs (Y1–Y8) on right side - eliminates layer crossings and reduces trace length in bus routing. |
| Dual 3-state enable logic | 2-input NOR gate control (OE1/OE2) - enables flexible bus arbitration using either signal alone or wired-OR logic. |
| pnp input structure | Reduces input current to ≤0.2 mA - increases fan-out to ≥20 ALS loads without degrading noise margin. |
| TTL-compatible voltage thresholds | VIH = 2.0 V min, VIL = 0.8 V max - ensures interoperability with legacy 74LS, 74ALS, and 74AS families. |
| Low propagation delay | tPHL/tPLH ≤14 ns @ CL = 50 pF - supports address strobing and data latching in sub-70 ns system cycles. |
Applications
| Memory Address Buffering | Parallel Bus Isolation |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microprocessor to multiple memory ICs in a shared bus architecture. IC Role / Device Role / Timing Role: Non-inverting octal buffer providing level translation and current gain while enabling/disabling address propagation via OE controls. Use Value: Eliminates need for discrete pull-ups or additional drivers; 24 mA sink capability handles combined capacitive load of multiple address inputs. |
Use Scenario: Isolating two 8-bit data buses (e.g., CPU-to-peripheral and peripheral-to-EEPROM) to prevent contention during concurrent access. IC Role / Device Role / Timing Role: 3-state line driver acting as bidirectional bus switch controlled by system arbitration logic. Use Value: Dual OE inputs allow independent enable timing for precise bus handoff; <14 ns propagation ensures cycle-accurate data transfer. |
| Legacy System Logic Interface | Industrial I/O Expansion |
|
Use Scenario: Interfacing modern microcontrollers with vintage TTL-based instrumentation or control panels requiring ALS-level drive strength. IC Role / Device Role / Timing Role: Voltage- and timing-compatible buffer translating between CMOS logic levels and legacy TTL bus standards. Use Value: pnp inputs reduce loading on MCU GPIOs; true output polarity preserves signal integrity without inversion logic. |
Use Scenario: Expanding parallel I/O on PLC modules where 8-bit status/control lines must drive LEDs, relays, or optocouplers. IC Role / Device Role / Timing Role: High-current buffer delivering 24 mA per output to directly drive indicator LEDs or small-signal relays. Use Value: Eliminates external transistor arrays; 3-state capability allows dynamic reconfiguration of I/O direction in firmware-controlled systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS541N | Same logic function and electrical specs, but in 20-pin PDIP package (13.97 mm width, through-hole mount). | Suitable for prototyping, legacy repair, or through-hole production; lacks surface-mount thermal performance and density. | Select when manual soldering, breadboarding, or backward compatibility with existing DIP footprints is required. |
| SN74ALS541DWR | Identical functionality and specs, packaged in SOIC-20 (DW) with 1.27 mm pitch and 7.5 mm width. | Offers higher thermal resistance (θJA = 58°C/W vs. 70°C/W for DB) and larger footprint than SSOP, but broader distributor availability. | Choose for designs already using SOIC-20 footprints or where reflow process compatibility with wider pitch is preferred. |
Compared with SN74ALS541N and SN74ALS541DWR, the SN74ALS541DBRG4 provides the smallest PCB area (SSOP-20), best fit for high-density industrial controllers, while maintaining identical ALS logic behavior, timing, and drive strength-making it optimal for new surface-mount designs prioritizing miniaturization.
Availability
SN74ALS541DBRG4 is available at Aetrix Electronics and suitable for industrial control systems, legacy equipment upgrades, and embedded memory subsystems requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALS541DBRG4 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 solutions with over 50 years of innovation in industrial and automotive electronics.
The SN74ALS541DBRG4 belongs to TI's legacy ALS (Advanced Low-Power Schottky) logic family, engineered for high-speed, low-power TTL-compatible interfacing in mission-critical industrial and military-grade systems.
FAQ
What is the maximum output current capability of the SN74ALS541DBRG4?
The SN74ALS541DBRG4 supports up to 24 mA sink current (IOL) per output at VCC = 4.5 V and up to –12 mA source current (IOH). These values are specified under recommended operating conditions and enable direct driving of multiple TTL inputs or moderate-current indicators without external amplification. The SN74ALS541DBRG4 does not support the 48 mA IOL variant (–1 suffix), which applies only to SN74ALS541-1xx part numbers.
Does the SN74ALS541DBRG4 have inverted or non-inverted outputs?
The SN74ALS541DBRG4 provides true (non-inverted) outputs: Y1–Y8 replicate the logic states of A1–A8 respectively. This distinguishes it from the SN74ALS540, which delivers inverted outputs. The '541' designation in SN74ALS541DBRG4 explicitly indicates true-output functionality per TI's ALS logic family naming convention.
What is the function of the two enable inputs (OE1 and OE2) on the SN74ALS541DBRG4?
OE1 and OE2 form a 2-input NOR gate controlling all eight outputs: if either OE1 or OE2 is driven high, all Y1–Y8 outputs enter high-impedance (3-state) mode. Both must be low for normal buffered operation. This dual-enable architecture allows flexible bus arbitration-e.g., one enable can be tied to a system-level control signal and the other to a local peripheral handshake.
Is the SN74ALS541DBRG4 compatible with 3.3 V logic systems?
No-the SN74ALS541DBRG4 is a 5 V-only device with absolute maximum VCC of 7 V and recommended operating range of 4.5–5.5 V. Its input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and output voltages (VOH ≈ 2.4 V min at IOL = 12 mA) are designed for TTL/ALS compatibility, not 3.3 V LVTTL or LVCMOS. Direct connection to 3.3 V systems requires level-shifting circuitry to avoid damage or incorrect logic interpretation.
What package type and dimensions does the SN74ALS541DBRG4 use?
The SN74ALS541DBRG4 uses a 20-pin SSOP (Shrink Small Outline Package) with DB suffix, measuring 7.4 mm × 5.3 mm × 2.0 mm max height and 0.65 mm lead pitch. It complies with JEDEC MO-150 and features NiPdAu lead finish, RoHS compliance, and MSL Level-1 rating-suitable for standard reflow profiles without dry-pack requirements.
SN74ALS541DBRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALS
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 15mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SN74ALS541DBRG4 FAQ
1.How can I place an order for SN74ALS541DBRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS541DBRG4 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 SN74ALS541DBRG4 reliable?
The price and inventory of SN74ALS541DBRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS541DBRG4 is usually 5 days.
3.What payment methods are accepted for SN74ALS541DBRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS541DBRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS541DBRG4?
SN74ALS541DBRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS541DBRG4 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 SN74ALS541DBRG4?
For technical support, including SN74ALS541DBRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS541DBRG4 requirements.
6.How does Aetrix verify that SN74ALS541DBRG4 is sourced from the original manufacturer or authorized distributors?
All SN74ALS541DBRG4 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 SN74ALS541DBRG4 meets industry standards.
7.What is the process for return or replacement of SN74ALS541DBRG4?
All SN74ALS541DBRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS541DBRG4, 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 SN74ALS541DBRG4 part is unused and in its original packaging.
Return procedure for SN74ALS541DBRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ALS541DBRG4 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…
