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onsemi 74VCX162240DT
- Part No.:
- 74VCX162240DT
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
74VCX162240DT.pdf
- Description:
- BUS DRIVER, ALVC/VCX/A SERIES
- Quantity:
- Payment:
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Inventory:16,926
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Product details
Overview
74VCX162240DT from onsemi is an inverting 16-bit buffer IC with 26 Ω series output resistors, designed for low-voltage operation at 1.65–3.6 V supply and 3.6 V-tolerant I/O. It features nibble-level 3-state control (four independent OE inputs), ±12 mA drive at 3.0 V, and 3.3 ns max propagation delay at 3.3 V - used in voltage-level translation between 1.8/2.5/3.3 V domains in memory interface and bus isolation circuits.
For engineers reviewing the 74VCX162240DT datasheet, pinout, applications, or equivalent options, key selection criteria include 3.6 V I/O tolerance, per-nibble OE control, integrated 26 Ω series termination, IOFF protection at VCC = 0 V, and TSSOP-48 package compatibility with high-density PCB layouts.
Technical Context
The 74VCX162240DT implements four independent 4-bit inverting buffers, each controlled by a dedicated Output Enable (OE1–OE4) input. Its architecture integrates 26 Ω series resistors on all 16 outputs to suppress switching noise without external components.
It supports live insertion/withdrawal via IOFF circuitry that forces high-impedance outputs when VCC = 0 V, and guarantees 3.6 V tolerance on all I/O pins regardless of VCC level (1.65–3.6 V), enabling safe interfacing across mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables direct use in 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| I/O Voltage Tolerance | 3.6 V - allows safe connection to 3.3 V busses even when powered at 1.8 V or 2.5 V. |
| Propagation Delay | 3.3 ns max (VCC = 3.0–3.6 V) - supports >200 MHz bus operation with tight timing margins. |
| Output Drive | ±12 mA at 3.0 V - sufficient to drive 50 Ω transmission lines or multiple CMOS loads without external buffers. |
| Static Supply Current | 20 µA - reduces quiescent power in always-on subsystems such as standby interfaces. |
| IOFF Leakage | 10 µA at VCC = 0 V - ensures true high-Z isolation during hot-swap or power sequencing. |
| Input Capacitance | 6 pF - minimizes loading on upstream drivers and preserves signal integrity in high-speed routing. |
Pinout & Package
TSSOP-48 package (Case 1201), 12.5 mm × 6.1 mm body, 0.5 mm pitch, exposed pad not present, JEDEC-compliant footprint with pin 1 indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1–OE4 | Nibble Output Enable Inputs | Active-low controls for D0:3/O0:3, D4:7/O4:7, D8:11/O8:11, D12:15/O12:15 - enables granular bus partitioning. |
| D0–D15 | Data Inputs | Inverting inputs driving corresponding O0–O15 outputs; accept 3.6 V signals regardless of VCC. |
| O0–O15 | 3-State Inverting Outputs | Include integrated 26 Ω series resistors - reduce ringing and EMI without discrete termination. |
| VCC (Pins 7, 21, 30, 42) | Power Supply | Four distributed VCC pins minimize IR drop and improve noise immunity in wide-bus applications. |
| GND (Pins 5, 10, 15, 27, 38, 44) | Ground | Six GND pins provide low-inductance return paths for all 16 outputs and support clean signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Per-nibble 3-state control | Four independent OE inputs allow selective activation of 4-bit segments - simplifies partial bus gating in memory controllers. |
| Integrated 26 Ω output series resistors | Eliminates need for 16 external resistors - saves PCB area and reduces BOM count in high-pin-count buffers. |
| 3.6 V tolerant I/O at any VCC ≥1.65 V | Enables interoperability between 1.8 V ASICs and 3.3 V peripherals without external translators - lowers system cost. |
| IOFF protection at VCC = 0 V | Prevents back-powering and current leakage during hot-plug events - required for PCIe add-in card and modular backplane designs. |
| Near-zero static ICC (20 µA) | Reduces standby power in battery-backed or energy-sensitive systems such as portable test equipment. |
Applications
| Memory Interface Buffering | Bus Isolation in Mixed-Voltage Systems |
|---|---|
Use Scenario: Isolating DDR SDRAM address/control bus between 2.5 V memory controller and 3.3 V legacy peripheral logic. IC Role / Device Role / Timing Role: Inverting 16-bit buffer with per-nibble OE control provides directionally matched, noise-suppressed signal translation. Use Value: Integrated 26 Ω resistors eliminate trace-length matching constraints and reduce simultaneous switching noise by >40% vs. discrete resistor solutions. | Use Scenario: Interfacing a 1.8 V FPGA I/O bank to a 3.3 V sensor hub in industrial IoT gateway. IC Role / Device Role / Timing Role: Voltage-tolerant buffer translates logic levels while maintaining sub-4 ns propagation delay for real-time sensor data capture. Use Value: 3.6 V I/O tolerance prevents latch-up during power sequencing mismatches, and IOFF ensures safe hot-swap capability. |
| Hot-Swappable Module Backplanes | Low-Power Embedded Control Bus |
Use Scenario: Signal conditioning on a modular PLC backplane where cards are inserted/removed under power. IC Role / Device Role / Timing Role: 3-state buffer with IOFF protection isolates card-specific buses during insertion to prevent system-wide glitches. Use Value: IOFF leakage <10 µA at VCC = 0 V blocks fault currents during live insertion - meets IEC 61000-4-2 Level 4 ESD robustness requirements. | Use Scenario: Driving LED segment displays and keypad scan lines from a 1.8 V microcontroller in handheld medical device. IC Role / Device Role / Timing Role: Low-quiescent-current inverting buffer extends battery life while delivering ±8 mA drive at 2.5 V for bright display segments. Use Value: 20 µA ICC in all states reduces average system sleep current by >15 µA per enabled channel versus standard VCX buffers. |
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 | No integrated series resistors; 3.3 V max VCC; no IOFF spec; 4.4 ns max tPD at 3.3 V. | Lacks 3.6 V I/O tolerance and live-insertion support - unsuitable for mixed-voltage hot-swap systems. | Select only for cost-sensitive 3.3 V-only applications where external termination is acceptable. |
| 74ALVC162240PW | Same pinout but 2.7 V max VCC; no 1.8 V operation; higher ICC (100 µA); no IOFF guarantee. | Cannot operate at 1.65–1.95 V - excludes ultra-low-power 1.8 V SoC interfaces. | Use only if existing design uses ALVC family and 2.5 V nominal supply is fixed. |
Compared with SN74LVC16240ADGGR and 74ALVC162240PW, the 74VCX162240DT uniquely combines 1.65–3.6 V operation, 3.6 V I/O tolerance, integrated 26 Ω resistors, and IOFF - making it the sole option for robust, low-power, mixed-voltage bus buffering with zero external components.
Availability
74VCX162240DT is available at Aetrix Electronics and suitable for memory interface buffering, mixed-voltage bus isolation, and hot-swappable module backplanes requiring stable component supply, long-term lifecycle support, and consistent TSSOP-48 packaging.
Supply support for 74VCX162240DT 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 innovation for automotive, industrial, cloud, and intelligent edge applications.
The VCX logic family - including the 74VCX162240DT - was engineered specifically for low-voltage, high-speed, mixed-supply-system interfacing with emphasis on I/O tolerance, noise suppression, and power sequencing safety.
FAQ
What is the maximum operating frequency supported by the 74VCX162240DT?
The 74VCX162240DT does not specify a maximum clock frequency, but its 3.3 ns max propagation delay at 3.3 V implies reliable operation up to approximately 200 MHz for single-shot data transfers. For sustained bus cycling, timing margins must account for skew (≤0.75 ns), enable/disable delays (≤3.8 ns), and board-level signal integrity - typical validated use cases target ≤100 MHz DDR-style buses.
Can the 74VCX162240DT be used with a 1.8 V supply while interfacing to a 3.3 V microcontroller?
Yes. The 74VCX162240DT is explicitly rated for 3.6 V-tolerant inputs and outputs across its full 1.65–3.6 V VCC range. When powered at 1.8 V, it safely accepts and drives 3.3 V logic signals without damage or level-shifter circuitry - confirmed by absolute maximum ratings (VI/VO = –0.5 to +4.6 V) and recommended operating conditions (VI up to 3.6 V).
Does the 74VCX162240DT require external pull-up or pull-down resistors on its OE pins?
No. The OE inputs of the 74VCX162240DT have defined VIH/VIL thresholds across all VCC levels (e.g., VIH = 0.65×VCC min at 1.65–2.3 V), and internal input structure ensures stable logic levels without external biasing. Floating OE pins are prohibited per datasheet (note: "DO NOT FLOAT Inputs"); tie unused OE pins directly to VCC or GND using short traces.
How does the 26 Ω series resistor on each output affect signal integrity in high-speed routing?
The 26 Ω series resistor in the 74VCX162240DT acts as a source termination matched to typical PCB trace impedances (50–75 Ω), reducing reflections and overshoot. Measured dynamic parameters confirm this: VOLP is limited to 0.35 V (at 3.3 V), and VOHV reaches 2.65 V - indicating controlled edge rates and suppressed ringing without added layout complexity.
Is the 74VCX162240DT pin-compatible with other 16-bit buffers in the VCX family?
Yes - the 74VCX162240DT shares identical TSSOP-48 pinout, power/ground pin distribution, and functional pin mapping with 74VCX16240 (non-inverting) and 74VCX16373 (latch). However, logic inversion and OE assignment differ; verify truth tables before substitution. All three support same VCC range, I/O tolerance, and AC specs.
74VCX162240DT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74VCX162240DT FAQ
1.How can I place an order for 74VCX162240DT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VCX162240DT 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 74VCX162240DT reliable?
The price and inventory of 74VCX162240DT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCX162240DT is usually 5 days.
3.What payment methods are accepted for 74VCX162240DT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCX162240DT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VCX162240DT?
74VCX162240DT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VCX162240DT 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 74VCX162240DT?
For technical support, including 74VCX162240DT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCX162240DT requirements.
6.How does Aetrix verify that 74VCX162240DT is sourced from the original manufacturer or authorized distributors?
All 74VCX162240DT 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 74VCX162240DT meets industry standards.
7.What is the process for return or replacement of 74VCX162240DT?
All 74VCX162240DT units undergo pre-shipment inspection (PSI). If there is an issue with 74VCX162240DT, 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 74VCX162240DT part is unused and in its original packaging.
Return procedure for 74VCX162240DT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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