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onsemi 74VCX162827MTDX
- Part No.:
- 74VCX162827MTDX
- Manufacturer:
- onsemi
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74VCX162827MTDX.pdf
- Description:
- IC BUF NON-INVERT 3.6V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,845
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Product details
Overview
74VCX162827MTDX from Fairchild Semiconductor is a low-voltage 20-bit non-inverting buffer/line driver with byte-level 3-STATE control, 3.6V-tolerant I/O, integrated 26Ω output series resistors, and 3.4 ns max propagation delay at 3.3V - used in memory address bus driving, clock distribution, and high-speed LVCMOS interface applications.
For engineers reviewing the 74VCX162827MTDX datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, byte-wise enable logic, TSSOP-56 package details, live-insertion support, and real-world timing behavior under 1.4V–3.6V VCC operation.
Technical Context
The 74VCX162827MTDX implements two independent 10-bit buffers (I0–I9 → O0–O9 and I10–I19 → O10–O19), each controlled by dual active-low NOR-gated enables (OE1/OE2 for byte 1; OE3/OE4 for byte 2). All outputs feature built-in 26Ω series termination to suppress transmission-line reflections without external resistors.
It operates across 1.4V–3.6V VCC while maintaining full 3.6V I/O tolerance - enabling safe interfacing between 1.8V/2.5V/3.3V domains and legacy 3.3V systems. Power-off high-impedance behavior and ±12 mA drive strength at 3.0V support hot-swap and bus-sharing use cases.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.4V to 3.6V - supports mixed-voltage system integration and battery-powered low-power designs |
| I/O Voltage Tolerance | −0.5V to +3.6V - allows safe connection to 3.3V buses even when powered at 1.8V |
| tPD (max) | 3.4 ns at VCC = 3.3V, CL = 30 pF - enables >200 MHz bus operation in short-trace layouts |
| Output Drive | ±12 mA at VCC = 3.0V - sufficient to drive 50Ω transmission lines or 10 TTL loads |
| Output Series Resistor | 26Ω (integrated) - eliminates need for external source-series termination on PCB |
| Power-off Hi-Z | Inputs and outputs enter high-impedance state when VCC = 0V - prevents back-driving during power sequencing |
| IOZ Leakage | ±10 µA at 3.6V - ensures minimal bus leakage in 3-STATE mode across temperature range |
Pinout & Package
74VCX162827MTDX is housed in a 56-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 6.1 mm wide, with 0.5 mm lead pitch. Thermal pad not present; standard surface-mount reflow profile applies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OEn (OE1–OE4) | Active-low byte enable input | NOR logic: both enables must be LOW to activate corresponding 10-bit output byte |
| I0–I19 | Buffer input | 20 single-ended CMOS inputs with 3.6V tolerance; no internal pull-up/down |
| O0–O19 | Non-inverting 3-STATE output | Includes 26Ω series resistor; drives up to ±12 mA; enters Hi-Z when any OE is HIGH |
| VCC | Positive supply | Single 1.4V–3.6V rail powers all logic and output stages |
| GND | Ground reference | Common return for inputs, outputs, and supply; decoupling required per JEDEC MO-153 layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Byte-wise 3-STATE control | Two independent 10-bit sections, each with dual OE pins for flexible bus partitioning and partial enable |
| Integrated 26Ω output termination | Eliminates four external 26Ω resistors per byte - reduces BOM count and PCB area in high-pin-count interfaces |
| Live insertion support | Power-off high-impedance and 3.6V-tolerant I/O allow safe hot-plug into powered backplanes or motherboards |
| Low-noise switching | Patented EMI reduction circuitry limits simultaneous switching noise (SSN) during multi-bit transitions |
| Wide voltage interoperability | Operates from 1.4V while accepting 0–3.6V input levels - bridges 1.8V SoCs to 3.3V peripherals without level shifters |
Applications
| Memory Address Buffering | Low-Voltage Clock Distribution |
|---|---|
Use Scenario: Driving 20-bit address bus from a 1.8V microcontroller to multiple 3.3V SRAM chips on a shared bus. IC Role / Device Role / Timing Role: Non-inverting buffer with byte-selectable 3-STATE control isolates memory banks and prevents contention. Use Value: Integrated 26Ω resistors suppress ringing on 10 cm traces; 3.6V I/O tolerance avoids external level shifters. |
Use Scenario: Distributing a 100 MHz system clock from a 2.5V PLL to four 3.3V FPGA clock inputs with matched skew. IC Role / Device Role / Timing Role: Low-skew (<0.75 ns) 20-bit fanout buffer with controlled edge rates. Use Value: tOSLH/tOSHL ≤ 0.75 ns at 1.8V ensures <100 ps inter-output skew - critical for synchronous clock tree design. |
| Hot-Swappable Module Interface | LVCMOS Bus Transceiver |
Use Scenario: Backplane slot interface where daughter cards are inserted/removed while main system remains powered. IC Role / Device Role / Timing Role: Bidirectional bus driver with power-off Hi-Z and live-insertion support. Use Value: IOFF leakage <10 µA and guaranteed Hi-Z at VCC = 0V prevent back-powering or signal corruption during insertion. |
Use Scenario: Isolating a 20-bit data path between a 1.4V ASIC and 3.3V peripheral ASIC in an industrial controller. IC Role / Device Role / Timing Role: Voltage-tolerant unidirectional line driver enabling mixed-supply communication. Use Value: VIH/VIL thresholds scale with VCC (e.g., VIH = 0.65×VCC at 1.65V), ensuring robust logic recognition across full supply range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | 16-bit (not 20-bit); no integrated series resistors; 3.6V I/O tolerant; 3.3 ns tPD at 3.3V | Lacks byte-wise enable (uses 4× 4-bit groups); requires external 22–33Ω resistors for clean edges | Select when 16-bit width suffices and board space allows discrete termination |
| 74ALVC162827PAG | Same 20-bit function and pinout; higher drive (±24 mA); no integrated 26Ω resistors; 2.5 ns tPD | Requires external series termination; better for longer traces or higher capacitive loads (>50 pF) | Choose for improved speed and drive strength where layout permits added resistors |
Compared with SN74LVC16244ADGGR and 74ALVC162827PAG, the 74VCX162827MTDX uniquely combines 20-bit width, byte-level 3-STATE control, and monolithic 26Ω termination - reducing component count and layout complexity in space-constrained, mixed-voltage embedded systems.
Availability
74VCX162827MTDX is available at Aetrix Electronics and suitable for memory subsystems, clock distribution networks, hot-pluggable modules, and LVCMOS bus interfaces requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance.
Supply support for 74VCX162827MTDX 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 designer of high-performance analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.
The VCX logic family - including the 74VCX162827MTDX - was engineered for ultra-low-voltage operation (down to 1.4V) with robust 3.6V I/O tolerance, targeting portable, battery-powered, and multi-rail embedded systems.
FAQ
What is the function of OE1–OE4 on the 74VCX162827MTDX?
The 74VCX162827MTDX uses OE1 and OE2 as NOR-gated enables for the first 10-bit byte (O0–O9), and OE3 and OE4 for the second byte (O10–O19). Both enables in a pair must be LOW to activate that byte's outputs; if either is HIGH, the corresponding outputs enter high-impedance. This architecture enables fine-grained bus control without external logic.
Does the 74VCX162827MTDX require external series resistors for signal integrity?
No - the 74VCX162827MTDX integrates 26Ω series resistors directly into each output (O0–O19), eliminating the need for external termination components. This simplifies layout, reduces BOM cost, and ensures consistent impedance matching for typical FR-4 PCB traces up to 10 cm in length.
Can the 74VCX162827MTDX operate at 1.4V VCC while interfacing with 3.3V signals?
Yes - the 74VCX162827MTDX supports VCC as low as 1.4V and tolerates input/output voltages up to 3.6V. At 1.4V VCC, VIH is 0.35×VCC (≈0.49V) and VIL is 0.35×VCC, allowing reliable detection of 3.3V logic levels without level-shifting circuitry.
What is the maximum output skew specification for the 74VCX162827MTDX?
The 74VCX162827MTDX specifies output-to-output skew (tOSLH/tOSHL) of ≤0.75 ns at VCC = 1.8V ±0.15V and CL = 15 pF. At 3.3V, skew is ≤0.5 ns. This tight skew enables precise timing alignment across all 20 outputs in clock fanout or parallel data path applications.
Is the 74VCX162827MTDX suitable for hot-swap applications?
Yes - the 74VCX162827MTDX supports live insertion and withdrawal per datasheet Note 1. Its power-off high-impedance behavior, 3.6V-tolerant I/O, and low IOFF leakage (<10 µA) prevent bus contention or back-driving when inserted into a powered system, making it ideal for modular backplane designs.
74VCX162827MTDX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VCX
- Package/Case:
- 56-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:
- 10
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 1.4V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
74VCX162827MTDX FAQ
1.How can I place an order for 74VCX162827MTDX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VCX162827MTDX 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 74VCX162827MTDX reliable?
The price and inventory of 74VCX162827MTDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCX162827MTDX is usually 5 days.
3.What payment methods are accepted for 74VCX162827MTDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCX162827MTDX transactions.
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4.How is shipping managed for 74VCX162827MTDX?
74VCX162827MTDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VCX162827MTDX 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 74VCX162827MTDX?
For technical support, including 74VCX162827MTDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCX162827MTDX requirements.
6.How does Aetrix verify that 74VCX162827MTDX is sourced from the original manufacturer or authorized distributors?
All 74VCX162827MTDX 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 74VCX162827MTDX meets industry standards.
7.What is the process for return or replacement of 74VCX162827MTDX?
All 74VCX162827MTDX units undergo pre-shipment inspection (PSI). If there is an issue with 74VCX162827MTDX, 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 74VCX162827MTDX part is unused and in its original packaging.
Return procedure for 74VCX162827MTDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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