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onsemi 74LCXH16245MTDX
- Part No.:
- 74LCXH16245MTDX
- Manufacturer:
- onsemi
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74LCXH16245MTDX.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,486
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Product details
Overview
74LCXH16245MTDX from ON Semiconductor is a low-voltage 16-bit bidirectional transceiver with bushold inputs, designed for bus interface between 2.5V/3.3V domains and 5V signal environments. It features dual-byte control (OE1/T/R1 and OE2/T/R2), 3-STATE outputs, 4.5 ns max propagation delay at VCC = 3.3V, ±24 mA output drive at 3.0V, and eliminates external pull-up resistors via active bushold circuitry. Used in memory expansion and mixed-voltage backplane interfaces.
For engineers reviewing the 74LCXH16245MTDX datasheet, pinout, applications, or equivalent options, key selection criteria include voltage translation capability (2.3–3.6V VCC), byte-level direction control, bushold input retention, 48-pin TSSOP package compatibility, and JESD78 latch-up compliance.
Technical Context
The 74LCXH16245MTDX implements two independent 8-bit bidirectional data paths (A0–A7/B0–B7 and A8–A15/B8–B15), each controlled by dedicated OE and T/R inputs. Its bushold circuitry actively maintains valid logic states on floating inputs without external biasing, reducing BOM count and board space.
It operates across 2.3V–3.6V supply range with guaranteed AC performance down to 2.3V, supports hot insertion via power-down high-impedance outputs, and integrates patented noise/EMI reduction circuitry to suppress switching transients during bus transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - Enables interoperability between 2.5V and 3.3V logic domains while tolerating 5V-tolerant I/Os. |
| Max Propagation Delay | 4.5 ns at VCC = 3.3V - Supports high-speed bus operation up to ~220 MHz clock-equivalent data rates. |
| Output Drive | ±24 mA at VCC = 3.0V - Sufficient to drive 50 Ω transmission lines or multiple CMOS loads without buffering. |
| Bushold Current | 45 µA min at VIN = 0.7V (2.3V VCC) - Ensures reliable input state retention under noise or open-bus conditions. |
| ESD Rating | HBM ≥ 2000V - Provides robust handling protection during PCB assembly and system integration. |
| Latch-up Immunity | JESD78 compliant - Guarantees immunity to destructive latch-up events under overvoltage stress. |
Pinout & Package
74LCXH16245MTDX is packaged in a 48-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1 mm wide, with 0.5 mm lead pitch and exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Side A bidirectional I/O with bushold | Connects to local bus segment; retains logic state when floating, eliminating pull-up resistors. |
| B0–B15 | Side B bidirectional I/O with bushold | Interfaces to remote or higher-voltage bus; supports 5V-tolerant signaling. |
| OE1, OE2 | Byte-select output enable inputs | Independently disable A/B ports per byte to isolate segments or reduce dynamic power. |
| T/R1, T/R2 | Byte-select direction control inputs | Determine data flow direction per 8-bit byte-critical for half-duplex memory or peripheral interfaces. |
| VCC, GND | Power and ground pins (4 each) | Distributed supply/ground connections minimize simultaneous switching noise and improve signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Bushold input circuitry | Actively holds unused or floating inputs at valid logic levels-removes need for 32 external pull-up resistors in full 16-bit configuration. |
| Byte-wise control architecture | Two independent OE/T/R pairs enable selective activation of upper/lower 8-bit lanes-reduces contention and simplifies arbitration logic. |
| Low-noise switching design | Patented EMI reduction circuitry limits di/dt during output transitions-meets stringent radiated emission requirements in dense PCB layouts. |
| Hot-insertion support | Power-down high-impedance outputs prevent bus contention during live card insertion-enables modular backplane systems. |
Applications
| Memory Expansion Interface | Industrial Backplane Bus |
|---|---|
Use Scenario: Adding SRAM or Flash memory to a 3.3V microcontroller with legacy 5V-compatible address/data bus. IC Role / Device Role / Timing Role: Voltage-translating bidirectional data buffer that isolates MCU I/O from memory bus loading and enables mixed-supply operation. Use Value: Eliminates level-shifter ICs and pull-up networks, reducing component count by ≥12 parts and PCB area by >15 mm² per interface. | Use Scenario: Interconnecting multiple 2.5V FPGA mezzanine cards to a 3.3V host controller via shared parallel backplane. IC Role / Device Role / Timing Role: Byte-controllable bus transceiver providing direction management, signal integrity preservation, and hot-swap isolation. Use Value: Enables independent lane enable/disable for diagnostics and reduces simultaneous switching noise by 50% vs. monolithic 16-bit alternatives. |
| Automotive Infotainment Hub | Test Equipment Data Acquisition |
Use Scenario: Bridging a 2.3V SoC processor to legacy 5V CAN/LIN transceivers and display controllers in head-unit designs. IC Role / Device Role / Timing Role: Low-voltage bidirectional interface with bushold ensuring deterministic reset-state behavior during power sequencing. Use Value: Guarantees safe default input states during brown-out conditions-prevents spurious writes to safety-critical peripherals. | Use Scenario: Connecting a 3.3V ARM-based controller to 16-bit ADC/DAC modules operating at 2.5V reference rails. IC Role / Device Role / Timing Role: Precision timing-controlled transceiver synchronizing data capture with sub-5 ns skew between channels. Use Value: Achieves <1 ns inter-channel skew (tOSLH/tOSHL) enabling coherent multi-channel sampling without external deskew calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ALVC16245QTR | No bushold; requires external pull-ups; 3.6V VCC max; 3.5 ns tPD at 3.3V | Lacks input state retention-unsuitable for systems with unpowered or intermittently driven buses. | Select when bushold is unnecessary and lower propagation delay is prioritized over floating-input robustness. |
| SN74LVC16245ADGGR | Single 16-bit OE/T/R control (no byte select); 3.6V VCC max; 4.2 ns tPD at 3.3V; no bushold | Less flexible direction control-requires additional logic for per-byte arbitration in segmented bus architectures. | Choose for cost-sensitive, non-segmented bus applications where simplified control suffices and layout space allows pull-up resistors. |
Compared with 74ALVC16245QTR and SN74LVC16245ADGGR, the 74LCXH16245MTDX uniquely delivers bushold-enabled floating-input immunity and true byte-level direction control-critical for reliable operation in partial-power-down or hot-plug systems where deterministic I/O states cannot be assumed.
Availability
74LCXH16245MTDX is available at Aetrix Electronics and suitable for memory expansion interfaces, industrial backplane buses, automotive infotainment hubs, and test equipment data acquisition systems requiring stable component supply and long-term obsolescence management.
Supply support for 74LCXH16245MTDX 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
ON Semiconductor is a global semiconductor manufacturer delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and edge applications.
The 74LCXH16245MTDX belongs to ON Semiconductor's legacy LCX logic family-designed specifically for low-voltage, high-speed bus interfacing with robust noise immunity and mixed-supply domain bridging capability.
FAQ
What is the function of bushold circuitry in the 74LCXH16245MTDX?
The bushold circuitry in the 74LCXH16245MTDX actively maintains the last-valid logic state on any floating or unterminated input (A0–A15, B0–B15, OE1, OE2, T/R1, T/R2), eliminating the need for external pull-up or pull-down resistors. This feature ensures deterministic I/O behavior during power-up, hot insertion, or bus idle periods-directly improving system reliability in modular or mixed-voltage designs using the 74LCXH16245MTDX.
Does the 74LCXH16245MTDX support 5V-tolerant inputs?
Yes, the 74LCXH16245MTDX supports 5V-tolerant inputs on all I/O pins (A0–A15 and B0–B15) when operated within its specified VCC range of 2.3V–3.6V. This allows seamless interfacing with legacy 5V logic while powered from modern low-voltage supplies-enabling backward compatibility without external level shifters in systems deploying the 74LCXH16245MTDX.
How does the byte-control architecture of the 74LCXH16245MTDX improve system design?
The 74LCXH16245MTDX provides separate OE1/T/R1 and OE2/T/R2 controls for its two 8-bit sections, allowing independent enable/disable and direction setting per byte. This enables selective bus segmentation, reduced dynamic power during partial transfers, and simplified arbitration in multi-master systems-offering greater flexibility than single-control transceivers like the SN74LVC16245ADGGR when implementing advanced protocols with the 74LCXH16245MTDX.
What is the maximum output drive capability of the 74LCXH16245MTDX?
The 74LCXH16245MTDX delivers ±24 mA output drive per I/O pin at VCC = 3.0V, sufficient to directly drive standard 50 Ω transmission lines or fan-out to ≥10 LVTTL loads. This high drive strength ensures signal integrity across longer traces or loaded buses without external buffers-making it suitable for demanding backplane and memory interface applications using the 74LCXH16245MTDX.
Is the 74LCXH16245MTDX compliant with industry reliability standards?
Yes, the 74LCXH16245MTDX meets JESD78 latch-up immunity specifications and achieves Human Body Model (HBM) ESD rating ≥2000V. These qualifications confirm robustness against electrical overstress during handling and operation-critical for manufacturing yield and field reliability in industrial and automotive applications deploying the 74LCXH16245MTDX.
74LCXH16245MTDX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCXH
- 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:
- 2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74LCXH16245MTDX FAQ
1.How can I place an order for 74LCXH16245MTDX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LCXH16245MTDX 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 74LCXH16245MTDX reliable?
The price and inventory of 74LCXH16245MTDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LCXH16245MTDX is usually 5 days.
3.What payment methods are accepted for 74LCXH16245MTDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LCXH16245MTDX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LCXH16245MTDX?
74LCXH16245MTDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LCXH16245MTDX 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 74LCXH16245MTDX?
For technical support, including 74LCXH16245MTDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LCXH16245MTDX requirements.
6.How does Aetrix verify that 74LCXH16245MTDX is sourced from the original manufacturer or authorized distributors?
All 74LCXH16245MTDX 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 74LCXH16245MTDX meets industry standards.
7.What is the process for return or replacement of 74LCXH16245MTDX?
All 74LCXH16245MTDX units undergo pre-shipment inspection (PSI). If there is an issue with 74LCXH16245MTDX, 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 74LCXH16245MTDX part is unused and in its original packaging.
Return procedure for 74LCXH16245MTDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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