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onsemi MC74ACT241DWR2G
- Part No.:
- MC74ACT241DWR2G
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC74ACT241DWR2G.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,268
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Product details
Overview
MC74ACT241DWR2G from onsemi is an octal 3-state buffer/line driver with dual independent output-enable controls (OE1, OE2), TTL-compatible inputs, ±24 mA output drive capability, and SOIC-20W package. It functions as a memory address driver or bus-oriented transmitter/receiver in high-density PC board designs.
For engineers reviewing the MC74ACT241DWR2G datasheet, pinout, applications, or equivalent options, key selection criteria include dual 4-bit 3-state control, 5 V operation, propagation delays under 10 ns, output drive strength, and SOIC-20W thermal resistance (96 °C/W).
Technical Context
The MC74ACT241DWR2G implements two independent 4-bit non-inverting buffers, each with dedicated 3-state enable (OE1 for pins 12/14/16/18; OE2 for pins 3/5/7/9). Inputs accept TTL-level signals (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.5 V), and outputs drive ±24 mA while maintaining VOH ≥ 4.4 V and VOL ≤ 0.44 V under load.
Its AC performance includes tPLH/tPHL ≤ 10.0 ns (CL = 50 pF, VCC = 5.0 V), tPZH/tPZL ≤ 10.0 ns, and tPHZ/tPLZ ≤ 11.5 ns - enabling reliable use in 5 V bus systems requiring fast enable/disable transitions and low propagation skew across all eight channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V logic rails and tolerance to supply ripple. |
| Output Drive | ±24 mA - supports direct connection to multiple TTL loads or moderate-capacitance buses without external buffering. |
| Propagation Delay | ≤10.0 ns - enables synchronization in high-speed address/data paths up to ~100 MHz system timing. |
| 3-State Enable Time | ≤10.0 ns - allows rapid bus arbitration and dynamic channel switching in multiplexed architectures. |
| Input Compatibility | TTL-level - eliminates need for level-shifting when interfacing with legacy 74LS/74ALS logic families. |
| ESD Rating | >2000 V HBM - provides robust handling during PCB assembly and field service in industrial environments. |
| Thermal Resistance | 96 °C/W (SOIC-20W) - supports continuous operation at full drive strength up to +85 °C ambient. |
Pinout & Package
MC74ACT241DWR2G is housed in a Pb-free SOIC-20W (Case 751D) package with 1.27 mm pitch, 12.8 mm × 7.5 mm body, and 2.5 mm height. Pin 1 is top-left corner (notch-marked), with GND (Pin 10) and VCC (Pin 20) placed diagonally opposite for optimal decoupling layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 8, 11, 13, 15, 17, 19 | Data input / Output terminals (DA1–DA4, YB1–YB4, DB1–DB4, YA1–YA4) | Eight bidirectional I/O pairs grouped into two 4-bit banks; non-inverting signal path with 3-state control per bank. |
| 3, 5, 7, 9 | YB1–YB4 outputs (Bank B) | Outputs enabled by OE2; driven low/high or high-Z based on OE2 state and corresponding DA inputs. |
| 12, 14, 16, 18 | YA1–YA4 outputs (Bank A) | Outputs enabled by OE1; independently controllable from Bank B, supporting split-bus isolation. |
| 10 | GND | Signal and power return reference; must be low-inductance connection to minimize ground bounce. |
| 20 | VCC | +5 V supply rail; requires local 0.1 µF ceramic decoupling adjacent to pin. |
| 11, 13 | OE1, OE2 | Active-low enables for Bank A and Bank B respectively; both must be low to activate outputs; high = high-impedance state. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state enables | OE1 and OE2 allow simultaneous or staggered control of two 4-bit data groups - essential for memory-mapped I/O partitioning and bus segment isolation. |
| ±24 mA output sink/source | Drives up to 10 standard TTL loads per output - eliminates need for external drivers in mid-density address/data bus applications. |
| TTL-compatible input thresholds | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.5 V - ensures interoperability with legacy 74LS, 74ALS, and microcontroller GPIOs without level translation. |
| Low propagation delay (≤10 ns) | Enables reliable timing closure in 5 V systems operating at >50 MHz clock domains - critical for memory address latching and clock distribution. |
| Pb-free SOIC-20W package | RoHS-compliant, JEDEC-standard footprint with 96 °C/W θJA - simplifies compliance and thermal design for industrial and automotive control modules. |
Applications
| Memory Address Buffering | Microcontroller Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory with tight timing margins. IC Role / Device Role / Timing Role: Non-inverting octal buffer with dual 3-state control isolates MCU address bus from memory during DMA cycles. Use Value: Ensures clean, low-skew address transitions (<10 ns delay) and prevents bus contention via independent OE1/OE2 gating. | Use Scenario: Interfacing an 8-bit MCU with parallel peripherals (LCD controller, ADC, FPGA configuration port). IC Role / Device Role / Timing Role: Bidirectional bus driver that conditions and isolates data/control signals between MCU and peripheral. Use Value: ±24 mA drive sustains signal integrity across 10 cm traces; TTL compatibility avoids level-shifter components. |
| Industrial PLC Backplane | Legacy System Bus Expansion |
Use Scenario: Expanding I/O capacity in modular PLC racks using shared 5 V backplane with multiple slot-addressed devices. IC Role / Device Role / Timing Role: Octal line driver providing isolated, high-current drive to backplane address/data lines per slot. Use Value: Dual OE control allows per-slot enable/disable without affecting neighboring modules; SOIC-20W supports conformal coating. | Use Scenario: Upgrading aging 74LS241-based systems where board space and pinout are constrained. IC Role / Device Role / Timing Role: Drop-in replacement for LS241 with enhanced speed, drive, and noise immunity. Use Value: Identical pinout and function enables retrofit without PCB change; 5× lower ICC quiescent current reduces system power budget. |
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 |
|---|---|---|---|
| SN74ACT241DWR | Same architecture, identical AC/DC specs, TI-branded SOIC-20 package; slightly higher ICC (10 µA vs 8 µA typical). | Direct pinout match; validated for TI-based designs with existing layout and test fixtures. | Select when sourcing from TI-authorized channels or maintaining TI-family BOM consistency. |
| 74VHC241M | Higher VCC range (2–5.5 V); lower drive (±8 mA); faster max speed (tPD = 7.5 ns), but no dual-OE - single OE controls all 8 outputs. | Suitable for wide-supply battery-powered systems, but lacks independent bank control required for segmented bus arbitration. | Choose only if single-enable operation suffices and supply voltage may drop below 4.5 V. |
Compared with SN74ACT241DWR and 74VHC241M, the MC74ACT241DWR2G uniquely delivers dual independent 3-state enables in a Pb-free SOIC-20W package with guaranteed ±24 mA drive and <10 ns propagation - making it optimal for memory-mapped I/O partitioning and industrial backplane isolation where bank-level control is mandatory.
Availability
MC74ACT241DWR2G is available at Aetrix Electronics and suitable for memory address buffering, microcontroller bus interface, and industrial PLC backplane applications requiring stable component supply, RoHS compliance, and long-term manufacturability.
Supply support for MC74ACT241DWR2G 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient technologies for automotive, industrial, cloud, medical, and IoT applications.
The MC74ACT241DWR2G belongs to the 74ACT advanced CMOS logic family, engineered for high-speed, low-power 5 V digital interfacing with TTL compatibility - targeting dense PCB layouts in industrial control and legacy-system upgrades.
FAQ
What is the maximum operating temperature range for the MC74ACT241DWR2G?
The MC74ACT241DWR2G is rated for operation from −40 °C to +85 °C across all package types. This range is validated per the Recommended Operating Conditions table in the official datasheet, and applies to both DC and AC performance specifications including propagation delay, output drive, and 3-state leakage. The SOIC-20W package's 96 °C/W thermal resistance ensures junction temperature remains within safe limits (TJ ≤ 140 °C) under full load at +85 °C ambient.
Does the MC74ACT241DWR2G support mixed-voltage interfacing?
No, the MC74ACT241DWR2G is specified only for 5 V operation (VCC = 4.5 V to 5.5 V) and does not support mixed-voltage I/O. Its inputs are TTL-compatible (VIH = 2.0 V min, VIL = 0.8 V max), but output voltage levels are referenced strictly to VCC - VOH ≥ 4.4 V and VOL ≤ 0.44 V at VCC = 5.5 V. Interfacing with 3.3 V logic requires external level-shifting circuitry or a different device such as the 74LVC241.
How are the two output-enable controls (OE1 and OE2) used in practice?
In the MC74ACT241DWR2G, OE1 controls outputs YA1–YA4 (pins 12, 14, 16, 18), while OE2 controls YB1–YB4 (pins 3, 5, 7, 9). Both are active-low. This allows independent gating of two 4-bit data groups - for example, OE1 can isolate memory address bits A0–A3 while OE2 enables data bits D0–D3 during a read cycle. The truth tables confirm that each bank enters high-impedance when its respective OE is high, regardless of data input states.
Is the MC74ACT241DWR2G pin-compatible with older 74LS241 devices?
Yes, the MC74ACT241DWR2G uses the same SOIC-20 pinout as the 74LS241 and shares identical terminal assignments for all inputs, outputs, VCC, and GND. However, it is not a direct functional drop-in: the MC74ACT241DWR2G has dual independent OE controls (OE1/OE2), whereas the 74LS241 uses a single OE. To retain full functionality, OE2 must be tied low or controlled separately; otherwise, only half the outputs will operate as expected.
What decoupling capacitance is recommended for the MC74ACT241DWR2G?
A minimum of 0.1 µF ceramic capacitor placed as close as possible to the VCC (Pin 20) and GND (Pin 10) pins is required for stable operation of the MC74ACT241DWR2G. For systems with high-frequency switching or multiple devices on the same rail, adding a bulk 4.7 µF–10 µF tantalum or aluminum electrolytic capacitor nearby improves low-frequency supply stability. Layout best practices mandate short, low-inductance traces between the capacitor pads and IC pins to suppress switching noise and ground bounce.
MC74ACT241DWR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ACT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
MC74ACT241DWR2G FAQ
1.How can I place an order for MC74ACT241DWR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74ACT241DWR2G 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 MC74ACT241DWR2G reliable?
The price and inventory of MC74ACT241DWR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74ACT241DWR2G is usually 5 days.
3.What payment methods are accepted for MC74ACT241DWR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74ACT241DWR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74ACT241DWR2G?
MC74ACT241DWR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74ACT241DWR2G 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 MC74ACT241DWR2G?
For technical support, including MC74ACT241DWR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74ACT241DWR2G requirements.
6.How does Aetrix verify that MC74ACT241DWR2G is sourced from the original manufacturer or authorized distributors?
All MC74ACT241DWR2G 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 MC74ACT241DWR2G meets industry standards.
7.What is the process for return or replacement of MC74ACT241DWR2G?
All MC74ACT241DWR2G units undergo pre-shipment inspection (PSI). If there is an issue with MC74ACT241DWR2G, 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 MC74ACT241DWR2G part is unused and in its original packaging.
Return procedure for MC74ACT241DWR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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