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onsemi MC74LCX16245DTR2
- Part No.:
- MC74LCX16245DTR2
- Manufacturer:
- onsemi
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
MC74LCX16245DTR2.pdf
- Description:
- IC TXRX 16BIT LV CMOS 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,202
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Product details
Overview
MC74LCX16245DTR2 from onsemi is a 16-bit non-inverting bidirectional transceiver with 5 V-tolerant I/O, operating from 1.65 V to 5.5 V supply, featuring 4.5 ns max propagation delay at 3.0 V, 24 mA balanced output drive, and dual byte-level control (OE1/T/R1 for A0–A7/B0–B7; OE2/T/R2 for A8–A15/B8–B15), used in low-voltage memory address/data bus interfacing between mixed-voltage domains.
For engineers reviewing the MC74LCX16245DTR2 datasheet, pinout, applications, or equivalent options, key selection criteria include 5 V-tolerant I/O compatibility with legacy TTL systems, high-speed 16-bit bidirectional data transfer under 1.65–5.5 V operation, and support for live insertion in hot-swap backplane designs.
Technical Context
The MC74LCX16245DTR2 implements two independent 8-bit transceiver sections, each controlled by dedicated Transmit/Receive (T/Rn) and Output Enable (OEn) inputs - enabling selective direction control and tri-state isolation per byte. Its 5.5 V absolute input voltage rating allows safe interfacing with 5 V logic while powered from as low as 1.65 V.
It features IOFF protection ensuring high-impedance outputs when VCC = 0 V, LVTTL/LVCMOS compatibility across supply range, and near-zero static ICC (20 µA) in all three logic states - critical for low-power embedded bus buffering and level translation in battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 5.5 V - enables direct interface between 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without external level shifters. |
| Max Propagation Delay | 4.5 ns at VCC = 3.0 V - supports high-speed memory and peripheral bus timing in sub-10 ns clock domains. |
| I/O Voltage Tolerance | 5.5 V absolute max input voltage - guarantees robust 5 V-tolerant operation even when VCC = 1.65 V or 2.5 V. |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - sufficient to drive 50 pF loads with clean edges and minimal signal degradation. |
| IOFF Leakage | <10 µA at VCC = 0 V - prevents back-driving and ensures safe power sequencing during hot-plug events. |
| Quiescent Supply Current | 20 µA typical - reduces system standby power in always-on bus interfaces and portable electronics. |
| ESD Rating (HBM) | >2000 V - meets industrial-grade ESD immunity requirements without external protection circuitry. |
Pinout & Package
TSSOP-48 package (Case 1201), 12.5 mm × 6.1 mm footprint, 0.5 mm pitch, Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1, OE2 | Byte-level Output Enable Inputs | Active-HIGH control: when HIGH, forces corresponding A/B port pair into high-impedance state - enables independent tri-state management of upper/lower bytes. |
| T/R1, T/R2 | Byte-level Transmit/Receive Inputs | Active-HIGH = A→B data flow; Active-LOW = B→A data flow - provides per-byte directional control without external logic. |
| A0–A15 | Side-A Bidirectional I/O Terminals | Function as inputs or 3-state outputs depending on T/Rn and OEn states - connect to low-voltage processor/memory address/data buses. |
| B0–B15 | Side-B Bidirectional I/O Terminals | Function as inputs or 3-state outputs depending on T/Rn and OEn states - interface to 5 V-tolerant peripherals or legacy TTL subsystems. |
| VCC, GND (×8 total) | Power and Ground Distribution | Multiple VCC/GND pins minimize ground bounce and supply noise - essential for stable 16-bit parallel switching at high speed. |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant I/O with 1.65 V VCC | Enables seamless interconnection between modern low-voltage SoCs and legacy 5 V peripherals without level-shifter ICs. |
| Live insertion support | IOFF protection and high-impedance shutdown at VCC = 0 V allow safe hot-plug into powered backplanes or modular systems. |
| 24 mA balanced sink/source drive | Ensures fast edge rates and reliable logic transitions across full 16-bit bus width under worst-case capacitive loading. |
| Low dynamic switching noise | Optimized internal layout and 8 dedicated GND pins reduce simultaneous switching output (SSO) noise in dense PCB layouts. |
| Sub-20 µA quiescent current | Minimizes standby power in always-on bus buffers for IoT gateways and battery-backed industrial controllers. |
Applications
| Memory Address Bus Interface | Hot-Swap Backplane Transceiver |
|---|---|
Use Scenario: Interfacing a 3.3 V microcontroller's address bus to a 5 V SRAM or EPROM module in an industrial PLC. IC Role / Device Role / Timing Role: Level-translating bidirectional address/data transceiver with 5 V-tolerant inputs and 3.3 V-compatible outputs. Use Value: Eliminates need for discrete level shifters while maintaining 4.5 ns propagation delay for cycle-accurate memory access timing. |
Use Scenario: Hot-pluggable I/O module in a telecom shelf where cards must be inserted/removed without powering down the backplane. IC Role / Device Role / Timing Role: Isolating and translating control/data signals between 1.8 V FPGA and 5 V backplane bus during insertion sequence. Use Value: IOFF protection ensures no back-current flows into unpowered card rails, preventing damage during partial power-up. |
| Low-Power Embedded Data Bus | Mixed-Voltage Microprocessor Expansion |
Use Scenario: Extending a 2.5 V ARM Cortex-M7 data bus to external peripherals operating at 3.3 V in a portable medical device. IC Role / Device Role / Timing Role: Low-quiescent-current bidirectional transceiver managing burst-mode data transfers between CPU and sensor hub. Use Value: 20 µA ICC in tri-state mode extends battery life in sleep cycles without sacrificing bus turnaround latency. |
Use Scenario: Adding a 5 V PCI Express-compatible peripheral interface to a 1.65 V RISC-V SoC development board. IC Role / Device Role / Timing Role: Voltage-domain bridging transceiver supporting both address latching and data strobing protocols. Use Value: Dual-byte control (OE1/T/R1 + OE2/T/R2) allows independent gating of address vs. data lanes for precise timing alignment. |
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 | Lower max VCC (3.6 V); no 5 V tolerance - requires external clamping for 5 V inputs. | Best suited for pure 3.3 V or lower systems; not recommended for mixed 5 V/low-V domains. | Select only if all connected logic stays ≤3.6 V and external 5 V protection is acceptable. |
| 74ALVC16245PW | Higher speed (3.1 ns tpd at 3.3 V); same 5 V tolerance but higher ICC (100 µA quiescent). | Preferred in ultra-low-latency test equipment or high-frequency instrumentation where power budget allows. | Choose when propagation delay <3.5 ns is mandatory and 5 V tolerance remains required. |
Compared with SN74LVC16245ADGGR and 74ALVC16245PW, the MC74LCX16245DTR2 uniquely balances 5 V tolerance, sub-5 ns delay, and ultra-low 20 µA quiescent current - making it optimal for mixed-voltage embedded systems where reliability, power, and timing co-constrain design.
Availability
MC74LCX16245DTR2 is available at Aetrix Electronics and suitable for memory address driving, hot-swap backplane interfacing, and low-power embedded data bus expansion requiring stable component supply and long-term industrial lifecycle support.
Supply support for MC74LCX16245DTR2 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 MC74LCX16245DTR2 belongs to the LCX family of low-voltage CMOS logic devices, designed specifically for high-speed, low-power, mixed-voltage bus interfacing in space-constrained and thermally sensitive embedded systems.
FAQ
What is the maximum operating temperature range for the MC74LCX16245DTR2?
The MC74LCX16245DTR2 is rated for operation from −40 °C to +125 °C ambient temperature, meeting extended industrial temperature requirements. This specification is validated across all electrical parameters in the datasheet's Recommended Operating Conditions table and applies to the TSSOP-48 package under standard PCB thermal conditions.
Does the MC74LCX16245DTR2 support live insertion when VCC = 0 V?
Yes, the MC74LCX16245DTR2 supports live insertion via its IOFF specification: when VCC = 0 V, all I/O pins enter a high-impedance state with leakage current limited to 10 µA maximum, preventing back-powering or latch-up during hot-plug events - a key feature confirmed in the DC Electrical Characteristics table.
Can the MC74LCX16245DTR2 drive a 50 pF load at 3.3 V with guaranteed timing?
Yes, the MC74LCX16245DTR2 guarantees 4.5 ns maximum propagation delay at VCC = 3.0 V with CL = 50 pF, as specified in the AC Electrical Characteristics table. At 3.3 V, performance improves further, and the 24 mA output drive ensures stable edge rates into 50 pF loads without external termination.
How many independent enable/control groups does the MC74LCX16245DTR2 have?
The MC74LCX16245DTR2 has two independent control groups: OE1/T/R1 manages A0–A7 and B0–B7 (lower byte), while OE2/T/R2 controls A8–A15 and B8–B15 (upper byte). This dual-byte architecture enables granular bus partitioning, such as separate address/data gating or split-memory bank control.
Is the MC74LCX16245DTR2 RoHS compliant and lead-free?
Yes, the MC74LCX16245DTR2 is Pb-free and RoHS compliant, as explicitly stated in the datasheet Features section and confirmed by the "G" suffix in the ordering code (MC74LCX16245DTR2G) and the "Pb-Free Package" marking diagram on page 6.
MC74LCX16245DTR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCX
- 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:
- 2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
MC74LCX16245DTR2 FAQ
1.How can I place an order for MC74LCX16245DTR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LCX16245DTR2 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 MC74LCX16245DTR2 reliable?
The price and inventory of MC74LCX16245DTR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LCX16245DTR2 is usually 5 days.
3.What payment methods are accepted for MC74LCX16245DTR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LCX16245DTR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LCX16245DTR2?
MC74LCX16245DTR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LCX16245DTR2 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 MC74LCX16245DTR2?
For technical support, including MC74LCX16245DTR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LCX16245DTR2 requirements.
6.How does Aetrix verify that MC74LCX16245DTR2 is sourced from the original manufacturer or authorized distributors?
All MC74LCX16245DTR2 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 MC74LCX16245DTR2 meets industry standards.
7.What is the process for return or replacement of MC74LCX16245DTR2?
All MC74LCX16245DTR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC74LCX16245DTR2, 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 MC74LCX16245DTR2 part is unused and in its original packaging.
Return procedure for MC74LCX16245DTR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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