My Inquiry
My Account
onsemi 74VCXH16245DTR
- Part No.:
- 74VCXH16245DTR
- Manufacturer:
- onsemi
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74VCXH16245DTR.pdf
- Description:
- IC TXRX 16BIT CMOS BIDIR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,327
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74VCXH16245DTR from onsemi is a low-voltage 16-bit non-inverting transceiver with 3.6 V-tolerant I/O, designed for bidirectional data flow between 1.65–3.3 V logic domains in high-speed digital systems. It features byte-level control (two independent octal sections), active bushold inputs, and IOFF protection enabling live insertion. Used in voltage-level translation between mixed-supply ASIC/FPGA interfaces.
For engineers reviewing the 74VCXH16245DTR datasheet, pinout, applications, or equivalent options, key selection criteria include 3.6 V I/O tolerance across 1.65–3.3 V VCC operation, 2.5 ns max propagation delay at 3.3 V, ±24 mA drive strength, TSSOP-48 package compatibility, and bushold-enabled floating-input immunity.
Technical Context
The 74VCXH16245DTR implements dual independent 8-bit transceiver channels controlled by separate OE/T/R pairs, supporting simultaneous or isolated bus direction control. Its CMOS design incorporates IOFF circuitry to enforce high-impedance outputs when VCC = 0 V and bushold inputs that actively retain logic states without external pull resistors.
Propagation delay varies with supply voltage: 2.5 ns max at 3.0–3.6 V, 3.0 ns max at 2.3–2.7 V, and 6.0 ns max at 1.65–1.95 V. Output enable/disable times are specified up to 9.3 ns, and output-to-output skew remains ≤0.75 ns under all operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports interoperability across 1.8 V, 2.5 V, and 3.3 V logic families |
| I/O Voltage Tolerance | 3.6 V - enables safe connection to higher-voltage busses without level-shifting components |
| Max Propagation Delay | 2.5 ns at 3.0–3.6 V - ensures sub-nanosecond timing margins in high-frequency data paths |
| Output Drive Strength | ±24 mA at 3.0 V - drives heavy capacitive loads or multiple fanouts without signal degradation |
| Bushold Current | ±75 µA at 3.0 V - actively holds floating inputs at valid logic levels, eliminating external pull resistors |
| IOFF Leakage | 10 µA at VCC = 0 V - guarantees true high-Z isolation during power-down or hot-swap events |
| Quiescent ICC | 20 µA - minimizes standby power in battery-sensitive or always-on embedded systems |
Pinout & Package
TSSOP-48 (DT suffix, Case 1201) surface-mount package with 0.5 mm pitch, 12.5 mm × 6.1 mm body, and exposed thermal pad not present. Pin 1 marked via top-side dot; pins numbered counterclockwise from corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OEN1, OEN2 | Output Enable Inputs | Active-HIGH control per byte group - disables both A and B ports to high-impedance state when HIGH |
| T/R1, T/R2 | Transmit/Receive Inputs | Active-HIGH enables A→B data flow; active-LOW enables B→A - defines real-time bidirectional direction per octal |
| A0–A15 | Side A I/O Terminals | Bi-directional data ports for first (A0–A7) and second (A8–A15) byte groups - connect to local low-voltage bus |
| B0–B15 | Side B I/O Terminals | Bi-directional data ports for first (B0–B7) and second (B8–B15) byte groups - interface to 3.3 V or mixed-voltage bus |
| VCC (Pins 41, 30, 18) | Power Supply | Single 1.65–3.6 V rail powers entire device - no separate I/O or core supplies required |
| GND (Pins 45, 39, 34, 21) | Ground Reference | Four dedicated ground pins reduce ground bounce and improve noise immunity in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| 3.6 V tolerant I/O | Allows direct interfacing to 3.3 V busses while operating from 1.8 V or 2.5 V supply - eliminates external level shifters |
| Active bushold inputs | Retains last-valid logic state on unused or floating inputs - removes need for 10 kΩ pull-up/down resistors and saves board space |
| IOFF power-off protection | Maintains high-impedance outputs even when VCC = 0 V - prevents back-driving powered subsystems during hot-swap or partial power-down |
| Byte-selectable control | Independent OE/T/R pairs for A0–A7/B0–B7 and A8–A15/B8–B15 - enables flexible partitioning of 16-bit data paths |
| Near-zero static current | 20 µA quiescent ICC in all three logic states - reduces system-level power budget in always-on IoT edge nodes |
Applications
| PCI Express Slot Interface | FPGA I/O Expansion Bridge |
|---|---|
Use Scenario: Translating control/status signals between 1.8 V FPGA I/O banks and 3.3 V PCIe slot sideband lines (CLKREQ#, PERST#, WAKE#). IC Role / Device Role / Timing Role: Bidirectional voltage translator with direction control synchronized to PCIe link training sequences. Use Value: Eliminates discrete level shifters while maintaining 2.5 ns timing margin for 100 MHz sideband signaling. | Use Scenario: Extending FPGA GPIO count to drive 3.3 V industrial sensors and actuators via shared parallel bus. IC Role / Device Role / Timing Role: Configurable 16-bit I/O expander with per-byte direction control for time-multiplexed sensor read/write cycles. Use Value: Enables single-FPGA control of mixed-voltage peripherals without PCB layer routing for separate voltage domains. |
| Hot-Swappable Module Backplane | Low-Power Memory Subsystem |
Use Scenario: Isolating 2.5 V module controller from 3.3 V backplane data/address bus during insertion/removal. IC Role / Device Role / Timing Role: Live-insertion-safe transceiver with IOFF and bushold - maintains bus integrity during mechanical mating. Use Value: Prevents bus contention and latch-up during hot-swap; bushold holds control lines stable before VCC ramps. | Use Scenario: Interfacing 1.8 V microcontroller memory controller to 3.3 V SRAM or PSRAM devices. IC Role / Device Role / Timing Role: Asynchronous bidirectional data path translator with sub-3 ns propagation for burst-mode memory access. Use Value: Supports 100+ MHz random-access timing while consuming only 20 µA static current in idle memory wait states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit bidirectional transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | 3.3 V only VCC range (1.65–3.6 V not supported); no bushold; IOFF not guaranteed at VCC = 0 V | Lacks live-insertion support and floating-input immunity - requires external pull resistors and careful power sequencing | Select when cost is primary constraint and system operates strictly at 3.3 V with controlled power-up sequence |
| 74ALVC16245PW | Higher drive (±24 mA at 2.5 V), but only 3.6 V tolerant at VCC ≥ 2.3 V; no bushold; TSSOP-48 footprint identical | Not suitable for 1.8 V operation or uncontrolled floating inputs - limited to 2.5/3.3 V mixed-bus designs | Select when 2.5 V operation dominates and bushold is managed externally via firmware or layout |
Compared with SN74LVC16245ADGGR and 74ALVC16245PW, the 74VCXH16245DTR uniquely combines 1.65 V minimum VCC, guaranteed 3.6 V I/O tolerance across full voltage range, active bushold, and IOFF - making it the only option qualified for robust 1.8 V–3.3 V hot-swap interconnects.
Availability
74VCXH16245DTR is available at Aetrix Electronics and suitable for PCI Express sideband interfaces, FPGA I/O expansion bridges, hot-swappable backplane modules, low-power memory subsystems, and mixed-voltage industrial controllers requiring stable component supply and long-term lifecycle assurance.
Supply support for 74VCXH16245DTR 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The VCXH logic family targets ultra-low-voltage, high-speed bidirectional interfacing in mixed-supply systems - specifically engineered for seamless voltage translation and hot-plug reliability in next-generation embedded platforms.
FAQ
What is the minimum supply voltage required for reliable operation of the 74VCXH16245DTR?
The 74VCXH16245DTR operates reliably down to 1.65 V VCC, as confirmed in the Recommended Operating Conditions table. At this voltage, propagation delay is specified at 6.0 ns max and output drive is ±6 mA. Operation below 1.65 V risks undefined logic behavior and violates absolute maximum ratings - sustained use below this threshold is not supported.
Does the 74VCXH16245DTR support hot-swap functionality, and what features enable it?
Yes, the 74VCXH16245DTR supports live insertion and withdrawal per its datasheet Features section. This is enabled by three verified capabilities: IOFF circuitry that forces outputs to high-impedance when VCC = 0 V, 3.6 V-tolerant I/O pins that withstand bus voltages before power-up, and active bushold that stabilizes floating inputs without external components - collectively preventing bus contention during mechanical mating.
Can the 74VCXH16245DTR be used to translate between 1.8 V and 3.3 V logic without external level-shifting circuitry?
Yes, the 74VCXH16245DTR is explicitly designed for this purpose. Its 3.6 V-tolerant inputs and outputs allow direct connection to 3.3 V busses while operating from a 1.8 V VCC supply, as stated in the device description and Absolute Maximum Ratings. No external level shifters, resistors, or voltage translators are needed - the IC handles bidirectional translation natively.
What is the function of the bushold circuitry in the 74VCXH16245DTR, and how does it affect system design?
The bushold circuitry in the 74VCXH16245DTR actively retains the last-valid logic state on unused or floating inputs using internal feedback, eliminating the need for external pull-up or pull-down resistors. Per datasheet specifications, it delivers ±75 µA hold current at 3.0 V. This reduces BOM count, saves PCB area, and improves signal integrity by removing resistor-induced parasitics - especially critical in high-density FPGA carrier boards.
How many independent transceiver sections does the 74VCXH16245DTR contain, and how are they controlled?
The 74VCXH16245DTR contains two independent 8-bit transceiver sections: one for A0–A7/B0–B7 and another for A8–A15/B8–B15. Each section has dedicated Output Enable (OEN1/OEN2) and Transmit/Receive (T/R1/T/R2) inputs. Control lines can be tied together for unified 16-bit operation or driven separately to enable byte-granular direction and enable control - a capability confirmed in the Functional Description and Logic Diagram sections.
74VCXH16245DTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VCXH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74VCXH16245DTR FAQ
1.How can I place an order for 74VCXH16245DTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VCXH16245DTR 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 74VCXH16245DTR reliable?
The price and inventory of 74VCXH16245DTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCXH16245DTR is usually 5 days.
3.What payment methods are accepted for 74VCXH16245DTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCXH16245DTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VCXH16245DTR?
74VCXH16245DTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VCXH16245DTR 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 74VCXH16245DTR?
For technical support, including 74VCXH16245DTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCXH16245DTR requirements.
6.How does Aetrix verify that 74VCXH16245DTR is sourced from the original manufacturer or authorized distributors?
All 74VCXH16245DTR 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 74VCXH16245DTR meets industry standards.
7.What is the process for return or replacement of 74VCXH16245DTR?
All 74VCXH16245DTR units undergo pre-shipment inspection (PSI). If there is an issue with 74VCXH16245DTR, 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 74VCXH16245DTR part is unused and in its original packaging.
Return procedure for 74VCXH16245DTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74VCXH16245DTR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
