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onsemi 74VCX16240MTDX
- Part No.:
- 74VCX16240MTDX
- Manufacturer:
- onsemi
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74VCX16240MTDX.pdf
- Description:
- IC BUFFER INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,329
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Product details
Overview
74VCX16240MTDX from Fairchild Semiconductor is a low-voltage 16-bit inverting buffer/line driver with 3.6V-tolerant I/O, designed for memory/address bus driving and clock distribution in 1.2V–3.6V systems. It features nibble-level 3-STATE control (four independent OE inputs), 2.5 ns max propagation delay at 3.3V, ±24 mA output drive, and power-off high-impedance protection.
For engineers reviewing the 74VCX16240MTDX datasheet, pinout, applications, or equivalent options, key selection criteria include 3.6V I/O tolerance across mixed-voltage interfaces, sub-3 ns timing at 3.3V, 48-pin TSSOP package compatibility, and live-insertion support in hot-swap backplane designs.
Technical Context
The 74VCX16240MTDX implements sixteen independent inverting buffers grouped into four 4-bit nibbles, each controlled by its own active-low Output Enable (OEn) input. This architecture enables selective 4-bit bus gating without affecting other data lanes.
It operates across 1.2V–3.6V VCC while maintaining full 3.6V tolerance on all inputs and outputs-enabling safe interfacing with higher-voltage logic domains. Its patented noise/EMI reduction circuitry and <30 ps output skew (tOSHL/tOSLH) ensure signal integrity in high-speed parallel bus applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.2V to 3.6V - supports dual-supply and voltage-scalable system designs |
| I/O Voltage Tolerance | Up to 3.6V - allows direct connection to 3.3V or 2.5V buses without level shifters |
| tPD (max) | 2.5 ns at VCC = 3.3V, CL = 30 pF - meets timing budgets for 300+ MHz bus operation |
| IOH/IOL Drive | ±24 mA at VCC = 3.0V–3.6V - drives 50 Ω transmission lines or multiple CMOS loads |
| Power-off High-Z | Inputs/outputs enter high-impedance state when VCC = 0V - prevents back-driving during power sequencing |
| ESD Rating | 2000V HBM - exceeds JEDEC JS-001 Class 2 for robust board handling |
| Operating Temp | –40°C to +85°C - qualified for industrial temperature environments |
Pinout & Package
74VCX16240MTDX is housed in a 48-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 6.1 mm wide, with 0.5 mm lead pitch. Pin mapping follows standard 74-series bus driver layout with symmetrical I/O grouping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1 | Nibble 1 Output Enable (Active LOW) | Controls O0–O3; enables independent 4-bit bus segment gating |
| OE2 | Nibble 2 Output Enable (Active LOW) | Controls O4–O7; supports partial bus isolation in multi-drop systems |
| OE3 | Nibble 3 Output Enable (Active LOW) | Controls O8–O11; allows hierarchical enable/disable of address/data nibbles |
| OE4 | Nibble 4 Output Enable (Active LOW) | Controls O12–O15; facilitates modular bus expansion and test access |
| I0–I15 | Inverting Input Terminals | Accept 1.2V–3.6V logic levels; invert and drive corresponding outputs |
| O0–O15 | Inverting 3-STATE Output Terminals | Deliver inverted signals with ±24 mA drive; enter high-Z when OE = HIGH |
| VCC, GND | Power Supply Pins (x2 VCC, x2 GND) | Dual VCC/GND pairs reduce switching noise and improve PSRR |
Key Features
| Feature | Design Value |
|---|---|
| Nibble-selectable 3-STATE control | Four independent OE inputs allow dynamic partitioning of 16-bit bus into four 4-bit zones |
| 3.6V-tolerant I/O at 1.2V–3.6V VCC | Eliminates external level translators when interfacing with legacy 3.3V peripherals |
| Live insertion support | Power-off high-Z and ESD-hardened I/O enable safe hot-plug operation in modular backplanes |
| Low-noise switching | Patented EMI reduction circuitry limits ground bounce and crosstalk in dense PCB layouts |
| Sub-3 ns propagation delay | 2.5 ns tPD at 3.3V ensures setup/hold margin for DDR2/DDR3 address/control buses |
Applications
| Memory Interface Buffering | Industrial Backplane Driver |
|---|---|
Use Scenario: Driving 16-bit SRAM or Flash address/data buses in low-power embedded controllers. IC Role / Device Role / Timing Role: Inverting buffer with 3-STATE control acts as bidirectional bus isolator and voltage-level translator. Use Value: Enables direct interface between 1.8V microcontroller and 3.3V memory using single-supply 74VCX16240MTDX without level shifters. |
Use Scenario: Hot-swappable module interconnect in programmable logic controller (PLC) backplanes. IC Role / Device Role / Timing Role: Nibble-gated line driver provides isolated bus segments with live-insertion safety. Use Value: OE1–OE4 allow firmware-controlled activation of individual I/O banks during module insertion, preventing bus contention. |
| Clock Distribution Fanout | Test Access Port Driver |
Use Scenario: Low-skew fanout of system clock or reset signals to multiple ASICs/FPGAs. IC Role / Device Role / Timing Role: Inverting buffer with matched tPHL/tPLH delivers synchronized clock edges across 16 outputs. Use Value: 0.5 ns max output-to-output skew (tOSLH/tOSHL) maintains <100 ps jitter budget for 100 MHz clocks. |
Use Scenario: JTAG boundary-scan test access port (TAP) signal buffering in high-density PCBs. IC Role / Device Role / Timing Role: Inverting buffer isolates test controller from device pins during normal operation. Use Value: Power-off high-Z behavior ensures TCK/TMS/TDI remain floating-safe when main VCC is off during debug sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16240ADGGR | 3.6V I/O tolerance only at VCC ≥ 2.7V; no power-off high-Z guarantee below 1.65V | Limited low-voltage operation (min VCC = 1.65V vs. 1.2V); less suitable for ultra-low-power sleep modes | Prefer 74VCX16240MTDX where 1.2V operation or guaranteed power-off isolation is required |
| 74ALVC16240PW | Higher ICC (100 µA typical vs. 20 µA), no ESD rating published, 3.6V tolerance not specified | Not qualified for mixed-voltage hot-swap use; lacks documented live-insertion support | Choose 74VCX16240MTDX for industrial backplane or battery-powered systems needing ESD robustness and low ICC |
Compared with SN74LVC16240ADGGR and 74ALVC16240PW, the 74VCX16240MTDX uniquely combines 1.2V operation, guaranteed power-off high-Z, 2000V HBM ESD, and 3.6V I/O tolerance - making it the only option qualified for ultra-low-voltage hot-swap and mixed-rail industrial bus interfaces.
Availability
74VCX16240MTDX is available at Aetrix Electronics and suitable for memory interface buffering, industrial backplane drivers, and clock distribution fanout requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74VCX16240MTDX 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 VCX logic family emphasized low-voltage operation and mixed-signal interoperability.
The 74VCX16240MTDX belongs to Fairchild's VCX low-voltage logic series, engineered specifically for power-sensitive industrial and communications systems requiring 3.6V-tolerant I/O and sub-3 ns timing at 1.2V–3.6V supply rails.
FAQ
What is the minimum operating voltage for the 74VCX16240MTDX?
The 74VCX16240MTDX operates down to 1.2V VCC, with full functionality including 3.6V I/O tolerance, 24 mA drive capability, and 3-STATE control. At 1.2V, output drive drops to 100 pA (quiescent), but logic thresholds remain valid per VIH/VIL specs. This makes the 74VCX16240MTDX suitable for ultra-low-power sleep states where other 16-bit buffers fail to meet timing or drive requirements.
Does the 74VCX16240MTDX support live insertion?
Yes, the 74VCX16240MTDX supports live insertion and withdrawal per datasheet Note 1. Its power-off high-impedance inputs and outputs prevent back-driving during hot-swap events. To ensure reliable high-Z during power-up/down, OE should be tied to VCC via a pull-up resistor - minimum value determined by driver current-sourcing capability - a requirement explicitly validated for the 74VCX16240MTDX in industrial backplane applications.
How many independent output-enable controls does the 74VCX16240MTDX have?
The 74VCX16240MTDX has four independent active-low Output Enable inputs: OE1, OE2, OE3, and OE4. Each controls a 4-bit nibble (O0–O3, O4–O7, O8–O11, O12–O15 respectively), enabling granular bus segmentation. These can be shorted together for full 16-bit operation, but the native nibble-level control is a defining feature of the 74VCX16240MTDX architecture.
What is the maximum propagation delay of the 74VCX16240MTDX at 3.3V?
The maximum propagation delay (tPHL/tPLH) of the 74VCX16240MTDX is 2.5 ns at VCC = 3.3V ±0.3V, CL = 30 pF, and RL = 500 Ω. This value is measured across all 16 channels and confirmed in the AC Electrical Characteristics table. The 74VCX16240MTDX achieves this performance while maintaining <0.5 ns output-to-output skew, critical for synchronous bus timing.
Is the 74VCX16240MTDX pin-compatible with standard 74-series 16-bit buffers?
The 74VCX16240MTDX uses a 48-pin TSSOP package (MTD48) with pin assignments matching industry-standard 16-bit inverting buffer layouts - including dedicated OE groups, symmetrical I/O pairing, and dual VCC/GND. While functionally identical to 74VCX16240 variants, it is not pin-compatible with non-VCX families (e.g., 74LVC16240) due to differing OE pin counts and internal nibble architecture - a distinction confirmed in Fairchild's connection diagram and logic symbol for the 74VCX16240MTDX.
74VCX16240MTDX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VCX
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74VCX16240MTDX FAQ
1.How can I place an order for 74VCX16240MTDX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VCX16240MTDX 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 74VCX16240MTDX reliable?
The price and inventory of 74VCX16240MTDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCX16240MTDX is usually 5 days.
3.What payment methods are accepted for 74VCX16240MTDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCX16240MTDX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VCX16240MTDX?
74VCX16240MTDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VCX16240MTDX 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 74VCX16240MTDX?
For technical support, including 74VCX16240MTDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCX16240MTDX requirements.
6.How does Aetrix verify that 74VCX16240MTDX is sourced from the original manufacturer or authorized distributors?
All 74VCX16240MTDX 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 74VCX16240MTDX meets industry standards.
7.What is the process for return or replacement of 74VCX16240MTDX?
All 74VCX16240MTDX units undergo pre-shipment inspection (PSI). If there is an issue with 74VCX16240MTDX, 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 74VCX16240MTDX part is unused and in its original packaging.
Return procedure for 74VCX16240MTDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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