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NXP Semiconductors 74ABT16245BDL,112
- Part No.:
- 74ABT16245BDL,112
- Manufacturer:
- NXP Semiconductors
- Package:
- -
- Datasheet:
-
74ABT16245BDL,112.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
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Inventory:1,181
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Product details
Overview
74ABT16245BDL,112 from Nexperia is a 16-bit 3-state bus transceiver in TSSOP48 package, designed for bidirectional data flow control between two 8-bit or one 16-bit parallel buses. It operates at 4.5–5.5 V, supports ±64 mA output drive, features dual direction (1DIR/2DIR) and dual output enable (1OE/2OE) controls, and includes IOFF circuitry for partial power-down protection-used in industrial backplane interfaces and legacy system bus expansion.
For engineers reviewing the 74ABT16245BDL,112 datasheet, 74ABT16245BDL,112 pinout, 74ABT16245BDL,112 application, or 74ABT16245BDL,112 equivalent, key selection criteria include its dual 8-bit segment control, TTL-compatible input thresholds, 2.0 ns typical propagation delay, IOFF-enabled hot-swap capability, and -40 °C to +85 °C industrial temperature rating.
Technical Context
The device implements two independent 8-bit transceiver sections sharing no internal logic coupling-each with dedicated DIR and OE inputs enabling asymmetric bus arbitration. Its BiCMOS output stage delivers asymmetrical drive strength (+64 mA sink / -32 mA source), optimized for driving terminated TTL loads while maintaining fast edge rates.
IOFF circuitry actively disables outputs when VCC = 0 V, limiting backflow current to ±100 μA, satisfying JESD78 Class II latch-up immunity (>500 mA) and enabling safe live insertion in multi-voltage backplanes. Input clamping (±1.2 V) and ESD robustness (HBM >2000 V, CDM >1000 V) support rugged board-level deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5 V TTL and CMOS systems without level-shifting. |
| Propagation Delay | tPLH/tPHL ≤ 3.5 ns @ VCC = 5.0 V - Enables reliable operation in high-speed 25+ MHz bus cycles. |
| Output Drive | -64 mA sink / +32 mA source - Drives eight standard TTL loads per 8-bit section without external buffers. |
| IOFF Leakage | ±100 μA @ VCC = 0 V - Prevents damaging back-current during hot-swap or partial power-down sequences. |
| Operating Temperature | -40 °C to +85 °C - Validated for industrial control cabinets and telecom line cards. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Survives handling and board assembly without special ESD precautions. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - Directly interfaces 5 V TTL logic without voltage translation. |
Pinout & Package
TSSOP48 (SOT362-1) package: plastic thin shrink small outline, 48 leads, 6.1 mm body width, 0.5 mm lead pitch, 1.2 mm max height-designed for high-density PCB layouts with thermal and noise isolation via multiple GND/VCC pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR (Pins 1, 24) | Direction control input | Active-HIGH signal selecting data flow direction per 8-bit section (A→B or B→A). |
| 1OE, 2OE (Pins 48, 25) | Output enable input | Active-LOW control enabling/disabling each 8-bit output bank independently. |
| 1A0–1A7 (Pins 47, 46, 44, 43, 41, 40, 38, 37) | Data I/O port A (Section 1) | First 8-bit bidirectional bus interface; electrically isolated from Section 2. |
| 1B0–1B7 (Pins 2, 3, 5, 6, 8, 9, 11, 12) | Data I/O port B (Section 1) | Complementary 8-bit bus for Section 1; paired with 1Ax under 1DIR/1OE control. |
| 2A0–2A7 (Pins 36, 35, 33, 32, 30, 29, 27, 26) | Data I/O port A (Section 2) | Second independent 8-bit bus; enables dual-bus arbitration in modular systems. |
| 2B0–2B7 (Pins 13, 14, 16, 17, 19, 20, 22, 23) | Data I/O port B (Section 2) | Paired with 2Ax under separate 2DIR/2OE control-no shared logic with Section 1. |
| VCC (Pins 7, 18, 31, 42) | Power supply | Four distributed VCC pins reduce switching noise and improve PSRR across wide bus activity. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths and minimize ground bounce on 16-bit transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 8-bit control | Enables simultaneous but non-interfering bus arbitration-e.g., CPU-to-peripheral and DMA-to-memory paths. |
| IOFF partial power-down | Guarantees <±100 μA off-state leakage when VCC = 0 V, eliminating backfeed risk during hot-swap maintenance. |
| Asymmetrical output drive | +32 mA source / -64 mA sink matches TTL input requirements while minimizing trace heating on dense PCBs. |
| Multiple VCC/GND distribution | Four VCC and eight GND pins suppress simultaneous switching noise (SSN) in high-fanout 16-bit applications. |
| Live insertion/extraction support | Validated mechanical and electrical tolerance for field-replaceable modules in telecom and industrial racks. |
Applications
| Industrial Backplane Interface | Legacy System Bus Expansion |
|---|---|
Use Scenario: Interfacing a modern microcontroller unit to a legacy ISA or VME bus in factory automation controllers. IC Role / Device Role / Timing Role: Bidirectional level-translating buffer isolating 3.3 V MCU I/O from 5 V bus signals while preserving timing integrity. Use Value: Eliminates need for discrete level shifters and reduces PCB layer count by integrating dual 8-bit control with IOFF safety. |
Use Scenario: Adding memory-mapped peripherals to an aging x86-based embedded controller without modifying core logic. IC Role / Device Role / Timing Role: 16-bit data path extender enabling synchronous read/write handshaking between CPU and add-on cards. Use Value: Supports 25 MHz bus clocking with sub-4 ns propagation delay, matching original system timing budgets. |
| Modular Telecom Line Card | Ruggedized Data Acquisition Module |
Use Scenario: Hot-swappable line card exchanging configuration and status data with a central shelf controller via parallel bus. IC Role / Device Role / Timing Role: Isolation transceiver managing bidirectional command/status transfers while preventing backfeed during insertion/removal. Use Value: IOFF circuitry ensures zero current injection into powered-backplane during live insertion-meeting NEBS GR-63-CORE requirements. |
Use Scenario: Sensor interface module aggregating analog-to-digital converter outputs onto a host processor's parallel data bus. IC Role / Device Role / Timing Role: Noise-immune 16-bit data latching element synchronizing burst-mode ADC reads with host polling cycles. Use Value: Eight GND pins and distributed VCC suppress ground bounce induced by simultaneous 16-bit sampling events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT16245DGGR | TI version in same TSSOP48 package; identical 4.5–5.5 V range and IOFF, but lower ESD (HBM 2000 V vs. Nexperia's >2000 V) and no CDM spec. | Valid for cost-sensitive industrial designs where CDM robustness is not required. | Select if sourcing TI-authorized channels; verify CDM compliance is unnecessary for target environment. |
| 74LVTH16245ADGG | Nexperia 3.3 V variant (2.7–3.6 V); lacks IOFF, lower drive (±24 mA), and narrower temp range (-40 °C to +85 °C same, but no JESD78 Class II latch-up data). | Suitable only for 3.3 V-only systems without hot-swap or mixed-voltage backplanes. | Choose only for pure 3.3 V designs; avoid where 5 V interoperability or live insertion is needed. |
Compared with SN74ABT16245DGGR, the 74ABT16245BDL,112 offers superior CDM ESD immunity and documented latch-up robustness; versus 74LVTH16245ADGG, it provides full 5 V operation, higher drive, and certified IOFF-making it the sole choice for mixed-voltage, hot-swap-capable industrial backplanes.
Availability
74ABT16245BDL,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system bus expansion, modular telecom line cards, and ruggedized data acquisition modules requiring stable component supply across extended product lifecycles.
Supply support for 74ABT16245BDL,112 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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions with focus on reliability, efficiency, and scalability for industrial, automotive, and consumer markets.
The 74ABT series targets high-speed 5 V TTL-compatible bus interfacing, emphasizing robustness, low noise, and hot-swap readiness for mission-critical infrastructure equipment.
FAQ
What is the maximum clock frequency supported by the 74ABT16245BDL,112 in a 16-bit bus application?
The device does not operate on a clock signal-it is asynchronous. Its 3.5 ns maximum propagation delay (tPLH/tPHL) supports reliable data transfer in bus systems running up to 25 MHz with standard setup/hold margins. Timing validation must be performed per actual layout and load conditions using the specified test circuit in Figure 5 of the datasheet.
Can 74ABT16245BDL,112 be used in mixed-voltage systems where one side operates at 3.3 V and the other at 5 V?
No-its absolute maximum input voltage is +7.0 V, but recommended operating input levels are referenced to its own VCC (4.5–5.5 V). Driving it with 3.3 V signals violates VIH minimum (2.0 V) margin and risks unreliable HIGH detection. Use a dedicated level translator like NTB0102 for true 3.3 V ↔ 5 V interfacing.
Does the IOFF feature require external biasing or control signals to activate?
No-IOFF is fully automatic and internal. When VCC drops to 0 V, the circuitry disables all outputs regardless of OE/DIR state, limiting backflow current to ±100 μA. No external components, pull-ups, or sequencing control are needed-activation is inherent to power removal.
How many ground connections are required for optimal noise performance in high-speed operation?
All eight GND pins (Pins 4, 10, 15, 21, 28, 34, 39, 45) must be connected to a low-impedance ground plane. This configuration minimizes ground loop inductance and suppresses simultaneous switching noise-critical for maintaining signal integrity at sub-4 ns edge rates across 16-bit parallel paths.
74ABT16245BDL,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- 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:
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- Qualification:
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74ABT16245BDL,112 FAQ
1.How can I place an order for 74ABT16245BDL,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT16245BDL,112 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 74ABT16245BDL,112 reliable?
The price and inventory of 74ABT16245BDL,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT16245BDL,112 is usually 5 days.
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5.How can I obtain technical support or documentation for 74ABT16245BDL,112?
For technical support, including 74ABT16245BDL,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT16245BDL,112 requirements.
6.How does Aetrix verify that 74ABT16245BDL,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT16245BDL,112 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 74ABT16245BDL,112 meets industry standards.
7.What is the process for return or replacement of 74ABT16245BDL,112?
All 74ABT16245BDL,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT16245BDL,112, 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 74ABT16245BDL,112 part is unused and in its original packaging.
Return procedure for 74ABT16245BDL,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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