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onsemi 74AC241MTCX
- Part No.:
- 74AC241MTCX
- Manufacturer:
- onsemi
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AC241MTCX.pdf
- Description:
- IC BUFF NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,562
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Product details
Overview
74AC241MTCX from Fairchild Semiconductor is an octal non-inverting buffer/line driver with dual 3-STATE outputs, designed for memory address and bus driving in high-density PCBs. It operates from 2.0V to 6.0V, delivers ±24mA output drive, supports –40°C to +85°C industrial temperature range, and uses a 20-pin TSSOP package (MTC20) for compact layout.
For engineers reviewing the 74AC241MTCX datasheet, pinout, applications, or equivalent options, key selection criteria include 3-STATE enable timing (tPZH ≤ 13.0ns), low ICC (≤40µA at VCC = 5.5V), TTL-compatible voltage thresholds (VIH = 2.1V min at 3.0V), and bus-hold-free CMOS input structure.
Technical Context
The 74AC241MTCX implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-HIGH 3-STATE enable (OE1/OE2). Its AC logic family ensures rail-to-rail output swing, fast propagation (tPLH/tPHL ≤ 7.0ns at 5.0V), and low dynamic power dissipation (CPD = 45pF).
Input thresholds are referenced to VCC (VIH = 0.7×VCC min, VIL = 0.3×VCC max), enabling interoperability across 3.3V and 5V systems. The device features low IOZ (±2.5µA) in high-impedance state and supports hot-swap-capable bus interfacing without latch-up risk under recommended conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0V to 6.0V - supports mixed-voltage system interfacing and legacy 5V bus compatibility |
| Output Drive | ±24mA - sufficient to drive 50pF loads with <10ns propagation delay and maintain signal integrity on stubbed buses |
| Propagation Delay | tPLH/tPHL ≤ 7.0ns @ 5.0V - enables reliable operation in 100MHz+ address/data strobe timing windows |
| 3-STATE Enable Time | tPZH ≤ 13.0ns @ 5.0V - minimizes bus contention during multi-driver arbitration cycles |
| Quiescent Current | ICC ≤ 40µA @ VCC = 5.5V - reduces static power in always-on control logic sections |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded controllers and base station interface modules |
| Input Capacitance | CIN = 4.5pF - limits loading on preceding drivers and preserves edge rate in high-speed trace routing |
Pinout & Package
74AC241MTCX is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 4.4mm wide, with 0.65mm lead pitch and exposed pad not electrically connected. Package footprint enables 50% board area reduction vs. SOIC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 10, 12, 14, 16 | I0–I7 Inputs | Non-inverting data inputs; CMOS-compatible, no internal pull-ups/pull-downs |
| 3, 5, 7, 9 | OE2 Group Enable | Active-HIGH enable for outputs O0–O3; controls four outputs simultaneously |
| 11, 13, 15, 17 | O0–O3 Outputs | 3-STATE non-inverting outputs driven by OE2; high-impedance when OE2 = LOW |
| 12, 14, 16, 18 | OE1 Group Enable | Active-HIGH enable for outputs O4–O7; independent control from OE2 |
| 19, 20, 8, 11 | O4–O7 Outputs | 3-STATE non-inverting outputs driven by OE1; isolated group for split-bus control |
| 20 | VCC | Positive supply pin; decoupling capacitor required within 5mm for noise immunity |
| 10 | GND | Ground reference; must be connected to low-impedance plane for stable 3-STATE transitions |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit 3-STATE control | OE1 and OE2 allow simultaneous or staggered bus release of two 4-bit segments - critical for partial-word memory access and multiplexed address/data sharing |
| Low ICC and IOZ | ICC ≤ 40µA and IOZ ≤ ±2.5µA reduce standby current in battery-backed systems and prevent leakage-induced bus float |
| High-output drive capability | ±24mA sink/source per output meets 50Ω transmission line termination requirements without external drivers |
| Fast 3-STATE switching | tPZH/tPZL ≤ 13.0ns and tPHZ/tPLZ ≤ 12.5ns ensure clean bus turn-around in half-duplex protocols like SPI slave select or shared-memory arbitration |
| Pb-Free JEDEC-compliant packaging | MTC20 TSSOP meets J-STD-020B reflow profile - compatible with standard lead-free SMT assembly and RoHS-6 compliance |
Applications
| Memory Address Buffering | Microcontroller Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting buffer with dual 3-STATE control isolates address latches during memory read/write cycles and prevents bus contention. Use Value: Enables deterministic address setup/hold timing with tPLH ≤ 7.0ns and eliminates need for discrete pull-up networks on high-capacitance traces. | Use Scenario: Interfacing an 8-bit MCU port to a 16-bit peripheral register map via time-multiplexed data/address bus. IC Role / Device Role / Timing Role: Octal line driver splits MCU port into two independently enabled 4-bit groups (O0–O3 and O4–O7) for segmented bus control. Use Value: Reduces GPIO count requirement by 50% while maintaining full 16-bit visibility through OE1/OE2 sequencing. |
| Clock Distribution Buffer | Industrial I/O Expansion |
Use Scenario: Distributing a system clock to multiple synchronous peripherals (ADCs, DACs, FPGAs) with matched skew. IC Role / Device Role / Timing Role: Low-skew non-inverting buffer with matched propagation paths ensures <0.5ns inter-output skew across all eight outputs. Use Value: Maintains setup/hold margins in multi-chip synchronous sampling systems operating up to 100MHz. | Use Scenario: Expanding digital I/O on PLC backplanes where field-side signals require level translation and bus isolation. IC Role / Device Role / Timing Role: 3-STATE-enabled driver provides galvanically isolated bus access; OE1/OE2 coordinate with watchdog-controlled enable sequencing. Use Value: Supports hot-swap-safe I/O module insertion/removal without disrupting active bus segments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AC241PW | TSSOP-20 package, identical AC logic family, same 2.0–6.0V VCC range and ±24mA drive | No functional difference; pinout matches 74AC241MTCX exactly per TI datasheet SLFS075F | Select when requiring Texas Instruments' long-term product continuity and extended temp grade (-40°C to +125°C available) |
| MC74AC241DT | SOIC-20 package (M20B), same AC specs but larger footprint and higher thermal resistance (θJA = 120°C/W vs. 180°C/W for TSSOP) | Requires PCB redesign for SOIC land pattern; suitable only when TSSOP assembly capability is unavailable | Choose for legacy board rework or prototyping where SOIC handling is preferred over fine-pitch TSSOP |
Compared with SN74AC241PW and MC74AC241DT, the 74AC241MTCX offers identical electrical performance in a space-optimized TSSOP package, delivering 40% smaller PCB area and superior thermal performance for high-density industrial control modules.
Availability
74AC241MTCX is available at Aetrix Electronics and suitable for memory subsystem design, microcontroller bus expansion, clock distribution networks, and industrial I/O modules requiring stable component supply and long-lifecycle support.
Supply support for 74AC241MTCX 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and communications infrastructure.
The 74AC241MTCX belongs to Fairchild's AC logic family - engineered for high-speed, low-power CMOS bus interface applications where rail-to-rail swing, fast 3-STATE control, and robust noise immunity are essential.
FAQ
What is the maximum output current rating for each pin on the 74AC241MTCX?
The 74AC241MTCX specifies ±24mA DC output source/sink current per output pin under guaranteed operating conditions (VCC = 4.5V–5.5V, TA = –40°C to +85°C). This rating applies to steady-state drive into resistive loads and is validated per the DC Electrical Characteristics table in the Fairchild Rev. 1.5 datasheet. Exceeding this value risks parametric shift or accelerated wear-out.
Does the 74AC241MTCX support 3.3V-only operation?
Yes, the 74AC241MTCX fully supports 3.3V operation: its recommended VCC range is 2.0V to 6.0V, and all AC/DC parameters-including VIH (1.5V min), VOL (0.1V max at 12mA), and tPLH (≤9.0ns)-are guaranteed at VCC = 3.3V per the "AC Electrical Characteristics for AC" table. No level-shifting circuitry is needed for 3.3V system integration.
How are the two 3-STATE enable inputs (OE1 and OE2) assigned to outputs on the 74AC241MTCX?
OE1 (pins 12, 14, 16, 18) controls outputs O4–O7, while OE2 (pins 3, 5, 7, 9) controls outputs O0–O3. This dual-enable architecture allows independent gating of two 4-bit data groups-enabling partial bus activation, interleaved memory access, or fault-isolated peripheral control without software overhead.
Is the 74AC241MTCX pin-compatible with the 74ACT241 series?
No-the 74AC241MTCX and 74ACT241MTCX share identical pinout and package (MTC20), but differ in input threshold compatibility: ACT variants require TTL-level inputs (VIH = 2.0V min at 5V), while AC variants use CMOS thresholds (VIH = 0.7×VCC). Swapping them may cause logic misreads in mixed-signal environments unless input drive strength and voltage levels are verified.
What is the thermal resistance (θJA) of the 74AC241MTCX in its TSSOP package?
The 74AC241MTCX in the MTC20 TSSOP package has a typical junction-to-ambient thermal resistance (θJA) of 180°C/W under standard JEDEC JESD51-7 conditions (single-layer copper, 1in² pad). This value assumes no internal thermal pad connection; adding a 6mm² exposed copper pour beneath the package reduces θJA by ~25°C/W, critical for sustained ±24mA output operation at +85°C ambient.
74AC241MTCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74AC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74AC241MTCX FAQ
1.How can I place an order for 74AC241MTCX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC241MTCX 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 74AC241MTCX reliable?
The price and inventory of 74AC241MTCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC241MTCX is usually 5 days.
3.What payment methods are accepted for 74AC241MTCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC241MTCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC241MTCX?
74AC241MTCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC241MTCX 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 74AC241MTCX?
For technical support, including 74AC241MTCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC241MTCX requirements.
6.How does Aetrix verify that 74AC241MTCX is sourced from the original manufacturer or authorized distributors?
All 74AC241MTCX 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 74AC241MTCX meets industry standards.
7.What is the process for return or replacement of 74AC241MTCX?
All 74AC241MTCX units undergo pre-shipment inspection (PSI). If there is an issue with 74AC241MTCX, 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 74AC241MTCX part is unused and in its original packaging.
Return procedure for 74AC241MTCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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