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onsemi 74ACTQ16541MTDX
- Part No.:
- 74ACTQ16541MTDX
- Manufacturer:
- onsemi
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ACTQ16541MTDX.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,959
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Product details
Overview
74ACTQ16541MTDX from Fairchild Semiconductor is a 16-bit non-inverting buffer/line driver with 3-STATE outputs, byte-controlled via dual independent OE inputs (OE1/OE2 for lower/upper byte), rated for 4.5–5.5 V operation, sourcing/sinking ±24 mA per output, and guaranteed pin-to-pin output skew ≤4.3 ns under 50 pF load. It serves as a memory/address bus driver in high-density digital systems.
For engineers reviewing the 74ACTQ16541MTDX datasheet, pinout, applications, or equivalent options, key selection criteria include simultaneous switching noise immunity (VOLP ≤0.8 V, VOHP ≤VOH+1.5 V), dynamic input thresholds (VIHD ≥2.0 V, VILD ≤0.8 V), and TSSOP-48 package compatibility with JEDEC MO-153 footprint.
Technical Context
The 74ACTQ16541MTDX implements two independent 8-bit buffer sections, each with dedicated active-low Output Enable (OEn) control, enabling selective 8-bit or full 16-bit bus driving without inter-byte timing coupling. Its FACT Quiet Series architecture incorporates GTO output control to suppress ground bounce and supply droop during multi-output switching.
AC performance is load-dependent: propagation delays range from 3.0 ns (tPLH, CL=50 pF) to 14.3 ns (tPLH, 16 outputs switching, CL=250 pF); 3-STATE enable/disable times are specified at 2.6–8.7 ns (CL=50 pF), while pin-to-pin skew is guaranteed ≤4.3 ns across all data-to-output transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL/CMOS logic rails and margin against supply ripple. |
| Output Drive | ±24 mA per output - Supports direct drive of 50 Ω transmission lines or fan-out to ≥10 LSTTL loads. |
| Propagation Delay | 3.0–7.8 ns (CL = 50 pF) - Enables reliable operation in sub-100 MHz address/data bus applications. |
| Pin-to-Pin Skew | ≤4.3 ns - Guarantees deterministic timing alignment across all 16 outputs for synchronous bus interfaces. |
| Quiet Output Noise | VOLP ≤0.8 V, VOHP ≤VOH+1.5 V - Limits simultaneous switching noise to preserve signal integrity on shared VCC/GND planes. |
| Dynamic Input Thresholds | VIHD ≥2.0 V, VILD ≤0.8 V - Provides robust noise immunity against crosstalk and ground bounce in dense PCB layouts. |
| Package | TSSOP-48 (JEDEC MO-153, 6.1 mm wide) - Surface-mount footprint optimized for automated assembly and thermal dissipation in compact systems. |
Pinout & Package
74ACTQ16541MTDX is housed in a 48-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 6.1 mm body width, 0.5 mm lead pitch, with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OEn (OE1, OE2) | Active-low byte enable | Separate controls for I0–I7/O0–O7 (OE1) and I8–I15/O8–O15 (OE2); shorting enables full 16-bit operation. |
| I0–I15 | Non-inverting data inputs | Directly pass logic state to corresponding outputs when respective OEn is LOW; high-impedance when OEn HIGH. |
| O0–O15 | 3-STATE buffered outputs | Drive external bus/load when enabled; present high-impedance state (Z) when disabled-no contention on shared lines. |
| VCC, GND | Power and ground terminals | Dual VCC/GND pairs (pins 1/24/48 and 2/25/47) reduce switching noise coupling and improve decoupling effectiveness. |
Key Features
| Feature | Design Value |
|---|---|
| FACT Quiet Series technology | Guaranteed simultaneous switching noise suppression (VOLP/VOLV, VOHP/VOHV) verified per Figure 1 test setup. |
| GTO output control | Reduces ground bounce and supply droop by controlling output transition timing relative to internal clock edges. |
| Byte-wise 3-STATE control | Independent OE1/OE2 allows interleaved or staggered bus access-critical for memory banking and multi-master arbitration. |
| Guaranteed output skew | ≤4.3 ns max tOST ensures deterministic timing across all 16 outputs, eliminating setup/hold violations in parallel buses. |
| High-drive capability | ±24 mA output current supports direct connection to unterminated 50 Ω traces or legacy TTL loads without external buffers. |
Applications
| Memory Address Bus Driver | PCI/ISA Local Bus Transceiver |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory in embedded control systems. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-STATE outputs isolates CPU address bus during DMA cycles and enables multi-device sharing. Use Value: Guaranteed ≤4.3 ns output skew ensures address validity across all bits simultaneously, preventing memory access corruption. |
Use Scenario: Bidirectional data buffering between a 32-bit host processor and legacy 16-bit peripheral cards on ISA or PCI-X edge connectors. IC Role / Device Role / Timing Role: Byte-controlled line driver/receiver manages direction and timing of data transfers without external direction logic. Use Value: Independent OE1/OE2 allows separate control of low/high byte lanes-enabling 8-bit or 16-bit transfers with precise timing alignment. |
| High-Density Backplane Interface | Test Equipment Signal Conditioning |
|
Use Scenario: Fan-out and level-shifting of clock or strobe signals across multiple daughterboards in telecom backplanes. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer maintains signal integrity over long trace lengths and multiple loads. Use Value: ±24 mA drive strength and quiet switching (VOLP ≤0.8 V) prevent jitter accumulation and ground bounce-induced bit errors. |
Use Scenario: Conditioning digital stimulus signals in ATE systems before routing to DUT pins with variable capacitive loading. IC Role / Device Role / Timing Role: Programmable 3-STATE driver provides on-demand signal isolation and impedance matching for test vector sequencing. Use Value: Dynamic input thresholds (VIHD ≥2.0 V, VILD ≤0.8 V) ensure reliable triggering despite probe capacitance and cable reflections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT16541DGGR | TI part in same TSSOP-48 package; identical pinout and DC specs, but AC timing slightly looser (tPLH max 8.5 ns vs. 7.8 ns @50 pF). | Valid for cost-sensitive industrial designs where 0.7 ns delay margin is acceptable; lacks Fairchild's GTO noise control architecture. | Select when sourcing flexibility is prioritized and noise-critical timing margins are not required. |
| 74LVC16244APAG | 3.3 V only (1.65–3.6 V), lower drive (±24 mA still met), but no guaranteed skew spec and no quiet-series noise characterization. | Suitable for mixed-voltage 3.3 V systems; requires level translation if interfacing with 5 V buses-adds component count and timing uncertainty. | Choose only for 3.3 V-native designs where 5 V tolerance and deterministic skew are not required. |
Compared with SN74ACT16541DGGR and 74LVC16244APAG, the 74ACTQ16541MTDX uniquely delivers guaranteed 4.3 ns skew, GTO-controlled quiet switching, and 5 V operation-all in a JEDEC MO-153 TSSOP package-making it irreplaceable in noise-sensitive, timing-critical 5 V bus architectures.
Availability
74ACTQ16541MTDX is available at Aetrix Electronics and suitable for memory subsystems, industrial backplanes, test instrumentation, and legacy bus interface designs requiring stable component supply, long-term lifecycle support, and consistent electrical performance across temperature and voltage ranges.
Supply support for 74ACTQ16541MTDX 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 leading designer of high-performance analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy ACTQ logic family remains widely deployed in industrial and telecom infrastructure.
The 74ACTQ16541MTDX belongs to Fairchild's ACTQ (Advanced CMOS TTL-Quiescent) logic series, engineered specifically for low-noise, high-speed 5 V bus driving in mission-critical digital systems where simultaneous switching noise and timing skew must be strictly bounded.
FAQ
What is the operating voltage range for the 74ACTQ16541MTDX?
The 74ACTQ16541MTDX operates over a supply voltage range of 4.5 V to 5.5 V. This range ensures compatibility with standard 5 V logic systems while providing margin against supply rail variation. Operation outside this range may cause functional failure or permanent damage, as absolute maximum ratings specify VCC from –0.5 V to +7.0 V but reliable operation is only guaranteed within the recommended 4.5–5.5 V window per the datasheet.
Does the 74ACTQ16541MTDX support independent control of its upper and lower bytes?
Yes, the 74ACTQ16541MTDX features two independent active-low Output Enable inputs: OE1 controls outputs O0–O7 (lower byte), and OE2 controls O8–O15 (upper byte). This allows selective activation of either 8-bit segment or both together-enabling flexible bus partitioning, memory banking, or staggered data transfers without external logic.
What is the maximum guaranteed output skew for the 74ACTQ16541MTDX?
The 74ACTQ16541MTDX guarantees a maximum pin-to-pin output skew (tOST) of 4.3 ns under standard conditions (VCC = 5.0 V, TA = –40°C to +85°C, CL = 50 pF). This specification applies to any combination of rising/falling transitions across all 16 outputs and is critical for maintaining setup/hold timing in synchronous parallel buses.
How does the 74ACTQ16541MTDX mitigate simultaneous switching noise?
The 74ACTQ16541MTDX uses Fairchild's FACT Quiet Series technology with GTO (Ground Transition Optimization) output control to minimize ground bounce and supply droop. Measured noise parameters include VOLP ≤0.8 V and VOHP ≤VOH+1.5 V under worst-case switching conditions (Figure 1 test setup), directly supporting signal integrity in high-density PCB layouts.
Is the 74ACTQ16541MTDX pin-compatible with other 16-bit ACT buffer families?
The 74ACTQ16541MTDX shares identical pinout and function with the 74ACT16541 and 74ACTQ16541SSC variants-differing only in package (TSSOP vs. SSOP). However, it is not pin-compatible with non-Q variants like 74ACT16244, which has different OE architecture (four 4-bit enables) and no guaranteed skew or quiet-series noise specs.
74ACTQ16541MTDX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ACTQ
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- 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:
- 48-TSSOP
74ACTQ16541MTDX FAQ
1.How can I place an order for 74ACTQ16541MTDX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACTQ16541MTDX 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 74ACTQ16541MTDX reliable?
The price and inventory of 74ACTQ16541MTDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACTQ16541MTDX is usually 5 days.
3.What payment methods are accepted for 74ACTQ16541MTDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACTQ16541MTDX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACTQ16541MTDX?
74ACTQ16541MTDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACTQ16541MTDX 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 74ACTQ16541MTDX?
For technical support, including 74ACTQ16541MTDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACTQ16541MTDX requirements.
6.How does Aetrix verify that 74ACTQ16541MTDX is sourced from the original manufacturer or authorized distributors?
All 74ACTQ16541MTDX 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 74ACTQ16541MTDX meets industry standards.
7.What is the process for return or replacement of 74ACTQ16541MTDX?
All 74ACTQ16541MTDX units undergo pre-shipment inspection (PSI). If there is an issue with 74ACTQ16541MTDX, 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 74ACTQ16541MTDX part is unused and in its original packaging.
Return procedure for 74ACTQ16541MTDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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