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onsemi 74VCXH16245DTRG
- Part No.:
- 74VCXH16245DTRG
- Manufacturer:
- onsemi
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74VCXH16245DTRG.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,542
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Product details
Overview
74VCXH16245DTRG 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 memory and bus interface applications. It supports byte-wise control (two independent octal sections), features active bushold inputs, IOFF protection at VCC = 0 V, and delivers ±24 mA drive at 3.0 V.
For engineers reviewing the 74VCXH16245DTRG datasheet, pinout, applications, or equivalent options, key selection criteria include voltage-level translation capability across 1.65/2.5/3.3 V systems, 3-state timing performance (≤2.5 ns propagation delay at 3.3 V), bushold input retention, and TSSOP-48 package compatibility with live insertion requirements.
Technical Context
The 74VCXH16245DTRG implements dual independent 8-bit transceiver channels controlled by separate OE1/T/R1 and OE2/T/R2 signals, enabling flexible bus partitioning. Its logic diagram confirms non-inverting bidirectional operation with active-HIGH transmit (T/Rn = HIGH enables A→B) and active-LOW receive (T/Rn = LOW enables B→A) modes.
It integrates IOFF circuitry that forces outputs into high-impedance when VCC = 0 V, ensuring signal isolation during power sequencing. Bushold inputs maintain valid logic states without external pull resistors, and 3.6 V tolerance on all I/O pins allows safe interfacing with higher-voltage busses while operating at 1.65–3.3 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports mixed-voltage system interoperability across 1.8 V, 2.5 V, and 3.3 V domains |
| I/O Voltage Tolerance | Up to 3.6 V - enables safe connection to 3.3 V busses without level shifters when powered at 1.8 V or 2.5 V |
| Propagation Delay (tPLH/tPHL) | 2.5 ns max at VCC = 3.0–3.6 V - ensures sub-400 MHz bus timing compliance in high-speed interfaces |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - drives standard 50 Ω transmission lines or multiple CMOS loads without buffering |
| Bushold Input Current | ±75 μA at VCC = 3.0 V - actively holds floating inputs at valid logic levels, eliminating external pull resistors |
| IOFF Leakage | 10 μA at VCC = 0 V - prevents back-driving powered-down sections during hot-swap or partial-power-down sequences |
| Quiescent ICC | 20 μA - minimizes standby power in battery-backed or always-on subsystems |
Pinout & Package
TSSOP-48 (DT suffix, Case 1201), 0.5 mm pitch, 12.5 mm × 6.1 mm body size, lead-free (Pb-free) finish per RoHS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OEn (OE1, OE2) | Output Enable Input | Active-HIGH control: HIGH places corresponding A/B ports in high-impedance state; required pull-up to VCC for reliable 3-state activation |
| T/Rn (T/R1, T/R2) | Transmit/Receive Control | Active-HIGH enables A→B data flow; active-LOW enables B→A - defines direction per byte group |
| A0–A15 | Side A I/O Port | Bidirectional data path for first (A0–A7) and second (A8–A15) byte groups - 3.6 V tolerant, bushold-enabled |
| B0–B15 | Side B I/O Port | Bidirectional data path mirroring A-side - electrically identical, independently controllable per byte |
| VCC (Pins 7, 21, 30, 42) | Power Supply | Single 1.65–3.6 V supply for entire device; four dedicated VCC pins reduce IR drop and improve noise immunity |
| GND (Pins 4, 10, 15, 19, 28, 34, 45) | Ground Reference | Seven ground pins provide low-inductance return paths and support simultaneous switching noise (SSN) mitigation |
Key Features
| Feature | Design Value |
|---|---|
| Byte-Controlled Dual Octal Architecture | Enables independent enable/direction control of A0–A7/B0–B7 and A8–A15/B8–B15 - supports split-bus or full-width operation without external logic |
| 3.6 V-Tolerant I/O with Live Insertion Support | Allows hot-plug operation in backplane or modular systems where 3.3 V busses remain active during 1.8 V/2.5 V module insertion/removal |
| Integrated Bushold Inputs | Eliminates need for 32 external pull-up/down resistors on A/B ports - reduces BOM count, PCB area, and layout complexity |
| IOFF Protection at VCC = 0 V | Prevents current leakage between powered and unpowered system sections - critical for power-gated SoC interconnects and FRU replacement |
| Low Dynamic Switching Noise | VOLP ≤ 0.8 V and VOHV ≥ 2.2 V at 3.3 V (CL = 30 pF) - maintains signal integrity under heavy capacitive loading and fast edge rates |
Applications
| Memory Subsystem Interface | Processor Bus Expansion |
|---|---|
Use Scenario: Interfacing a 1.8 V FPGA memory controller to a 3.3 V SDRAM module in embedded instrumentation. IC Role / Device Role / Timing Role: Bidirectional voltage-translating transceiver managing address/data/control signals between mismatched voltage domains. Use Value: Eliminates discrete level shifters while maintaining <2.5 ns propagation delay - preserves setup/hold timing margins for 100+ MHz SDRAM clocks. | Use Scenario: Extending a 2.5 V microprocessor local bus to peripheral modules operating at 3.3 V in industrial PLC backplanes. IC Role / Device Role / Timing Role: Byte-selectable bus transceiver enabling isolated enablement of I/O peripherals without affecting core processor timing. Use Value: Dual OE/T/R controls allow independent arbitration of two 8-bit peripheral lanes - simplifies bus grant logic and reduces gate count. |
| Hot-Swappable Module Interface | Low-Power Sensor Hub Interconnect |
Use Scenario: Connecting a removable 3.3 V sensor card to a 1.8 V host MCU in medical diagnostic equipment requiring field-replaceable modules. IC Role / Device Role / Timing Role: Live-insertion-capable transceiver providing electrical isolation and voltage translation during module insertion/removal. Use Value: IOFF and 3.6 V tolerance prevent bus contention and latch-up during hot-swap - meets IEC 61000-4-2 ESD and safety requirements. | Use Scenario: Aggregating data from eight 1.8 V digital sensors (I²C/SPI) to a 2.5 V application processor in wearable health monitors. IC Role / Device Role / Timing Role: Low-quiescent-current (20 μA) bidirectional buffer isolating sensor domain from processor domain while retaining signal fidelity. Use Value: Bushold inputs hold sensor bus lines stable during sleep mode - avoids wake-up glitches and extends battery life beyond 72 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | Lower VCC range (1.65–3.6 V same), but no bushold; IOFF not specified; 3.6 V tolerance only at VCC ≥ 2.3 V | Lacks bushold and guaranteed IOFF - requires external pull resistors and careful power sequencing | Select when cost sensitivity outweighs design simplicity and live-insertion requirements |
| 74ALVCH16245PAG | Wider VCC range (1.2–3.6 V); faster tPLH (1.9 ns at 3.3 V); no bushold; IOFF supported | Better speed/power trade-off at 3.3 V, but lacks bushold - increases BOM and layout overhead | Select for highest-speed 3.3 V-only systems where external termination is acceptable |
Compared with SN74LVC16245ADGGR and 74ALVCH16245PAG, the 74VCXH16245DTRG uniquely combines bushold, guaranteed IOFF, and full 3.6 V tolerance across its entire 1.65–3.6 V supply range - making it optimal for mixed-voltage, hot-swap, and low-BOM designs where reliability and layout simplicity are prioritized over marginal speed gains.
Availability
74VCXH16245DTRG is available at Aetrix Electronics and suitable for memory subsystem interfaces, processor bus expansion, hot-swappable module interconnects, low-power sensor hub designs, and industrial backplane applications requiring stable component supply and long-term lifecycle assurance.
Supply support for 74VCXH16245DTRG 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 low-voltage, high-speed, mixed-domain interfacing - specifically engineered for voltage translation, bus isolation, and live-insertion capability in space-constrained, power-sensitive embedded systems.
FAQ
What voltage levels does the 74VCXH16245DTRG support for VCC and I/O operation?
The 74VCXH16245DTRG operates with VCC from 1.65 V to 3.6 V and tolerates input/output voltages up to 3.6 V regardless of VCC level. This allows safe interfacing between 1.8 V, 2.5 V, and 3.3 V logic domains without external level shifters. The device is fully specified across this range, including propagation delay, drive strength, and bushold performance - all confirmed in the official onsemi datasheet Rev. 3.
How does the 74VCXH16245DTRG handle floating inputs, and is external termination required?
The 74VCXH16245DTRG includes active bushold circuitry on all A and B port inputs, which maintains a valid logic state without external pull-up or pull-down resistors. At VCC = 3.0 V, bushold provides ±75 μA holding current - sufficient to override typical PCB leakage and noise. Therefore, no external termination is required for unused or floating inputs, reducing BOM cost and PCB routing complexity.
Can the 74VCXH16245DTRG be used in hot-swap or live-insertion applications?
Yes, the 74VCXH16245DTRG supports live insertion and withdrawal per its datasheet. Key enablers include 3.6 V-tolerant I/O (preventing damage when connecting to active 3.3 V busses), IOFF functionality (outputs go high-impedance when VCC = 0 V), and robust ESD protection (>2000 V HBM). These features ensure electrical safety and signal integrity during module replacement in powered-backplane systems.
What is the recommended configuration for the Output Enable (OE) pins on the 74VCXH16245DTRG?
The OE1 and OE2 pins on the 74VCXH16245DTRG must be pulled up to VCC via external resistors to ensure reliable 3-state activation when inactive. The resistor value depends on the sink current capability of the driving logic - typically 4.7 kΩ to 10 kΩ. This requirement is explicitly noted in the datasheet to prevent unintended output leakage during power-up or reset conditions.
Does the 74VCXH16245DTRG support independent control of its two 8-bit sections?
Yes, the 74VCXH16245DTRG provides fully independent control of its two 8-bit sections via separate OE1/T/R1 (for A0–A7/B0–B7) and OE2/T/R2 (for A8–A15/B8–B15) signal pairs. This allows one byte group to transmit while the other receives, or to isolate portions of the bus - enabling flexible memory banking, peripheral arbitration, or fault containment without additional logic.
74VCXH16245DTRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VCXH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, 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:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74VCXH16245DTRG FAQ
1.How can I place an order for 74VCXH16245DTRG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VCXH16245DTRG 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 74VCXH16245DTRG reliable?
The price and inventory of 74VCXH16245DTRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCXH16245DTRG is usually 5 days.
3.What payment methods are accepted for 74VCXH16245DTRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCXH16245DTRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VCXH16245DTRG?
74VCXH16245DTRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VCXH16245DTRG 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 74VCXH16245DTRG?
For technical support, including 74VCXH16245DTRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCXH16245DTRG requirements.
6.How does Aetrix verify that 74VCXH16245DTRG is sourced from the original manufacturer or authorized distributors?
All 74VCXH16245DTRG 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 74VCXH16245DTRG meets industry standards.
7.What is the process for return or replacement of 74VCXH16245DTRG?
All 74VCXH16245DTRG units undergo pre-shipment inspection (PSI). If there is an issue with 74VCXH16245DTRG, 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 74VCXH16245DTRG part is unused and in its original packaging.
Return procedure for 74VCXH16245DTRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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