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Texas Instruments 74ABT16543DGGRG4
- Part No.:
- 74ABT16543DGGRG4
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ABT16543DGGRG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,895
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Product details
Overview
74ABT16543DGGRG4 from Texas Instruments is a 16-bit registered transceiver with dual 8-bit bidirectional data paths, 3-state outputs, and independent A-to-B/B-to-A latch and output enable controls. It operates at 4.5–5.5 V, supports –32 mA high-drive IOH and 64 mA IOL, and is rated for –40°C to 85°C industrial temperature range. It is used in high-speed bus interface applications requiring temporary data latching and direction-controlled isolation.
For engineers reviewing the 74ABT16543DGGRG4 datasheet, 74ABT16543DGGRG4 pinout, 74ABT16543DGGRG4 application, or 74ABT16543DGGRG4 equivalent, this device serves as a logic-level bidirectional bus transceiver with registered flow-through architecture, distributed power/ground pins for noise reduction, and latch-enable timing critical for synchronous data capture in backplane or memory subsystem designs.
Technical Context
The 74ABT16543DGGRG4 implements two independent 8-bit D-type latch sections (A↔B), each with dedicated CE, LE, and OE inputs enabling asynchronous data capture and 3-state output control per direction. Its EPIC-IIB BiCMOS process delivers low ground bounce (<1 V VOLP) and latch-up immunity >500 mA per JESD-17.
It features flow-through pinout architecture minimizing PCB trace length, distributed VCC/GND pins reducing simultaneous switching noise, and TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V) with ±1 µA input leakage at 5.5 V. Propagation delays are specified at 1–5.7 ns (tPLH/tPHL) and enable/disable times at 1–7.9 ns (tPZH/tPZL) under 50-pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5-V TTL and mixed-voltage system interfaces. |
| Output Drive | –32 mA IOH / 64 mA IOL - Supports high-fanout bus loading and robust signal integrity on terminated lines. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and communications equipment. |
| Propagation Delay | 1.0–3.8 ns (tPLH/tPHL, CL = 50 pF) - Enables reliable operation in sub-250-MHz data transfer systems. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - Guarantees clean logic-level recognition across voltage tolerances and noise margins. |
| Thermal Resistance | θJA = 81°C/W (DGG package) - Defines maximum power dissipation limit under natural convection cooling. |
| Package | 56-pin TSSOP (DGG), 13.9 × 6.1 mm, 1.2 mm max height - Optimized for high-density PCB layouts with fine-pitch routing. |
Pinout & Package
74ABT16543DGGRG4 uses a 56-pin Thin Shrink Small-Outline Package (TSSOP-DGG) with 0.5-mm pitch, 13.9 mm × 6.1 mm body, and 1.2 mm maximum height. Pin 1 is located at top-left corner (Q1 quadrant) with beveled edge marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable (active-low) | Controls 3-state output drivers independently per 8-bit section and direction; must be pulled high via resistor during power-up to ensure Hi-Z state. |
| 1LEAB, 2LEAB, 1LEBA, 2LEBA | Latch Enable (active-low) | Samples and holds A or B port data on low-to-high transition; transparent when low, latched when high. |
| 1CEAB, 2CEAB, 1CEBA, 2CEBA | Chip Enable (active-low) | Enables data flow path: CEAB low permits A→B latching/output; CEBA low permits B→A latching/output. |
| A1–A8, B1–B8 (×2 sections) | Bidirectional Data Ports | Two independent 8-bit I/O ports supporting concurrent or split 16-bit operation; no internal direction control-external logic defines flow. |
| VCC (pins 7, 22, 35, 46) | Power Supply | Distributed VCC pins minimize IR drop and switching noise across the 16-bit bus interface. |
| GND (pins 4, 11, 18, 25, 32, 39, 44, 53) | Ground Reference | Eight GND pins provide low-inductance return paths, critical for maintaining signal integrity at high edge rates. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins placed on opposite sides of package to simplify layer routing and reduce crosstalk in dense PCB layouts. |
| Distributed VCC/GND pinning | Four VCC and eight GND pins evenly spaced across the 56-pin array suppress simultaneous switching noise and improve power delivery stability. |
| High-drive 3-state outputs | –32 mA IOH / 64 mA IOL drive strength enables direct connection to heavily loaded buses without external buffers. |
| Low ground bounce (VOLP) | Typical <1 V at VCC = 5 V, TA = 25°C - Reduces false triggering and timing jitter in adjacent logic circuits. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power, achieving <1 µA ICC standby current while sustaining nanosecond propagation. |
Applications
| Backplane Data Interface | Memory Subsystem Buffering |
|---|---|
|
Use Scenario: Bidirectional data transfer between processor and peripheral modules across a multi-slot backplane with shared address/data bus. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized latching of address/data on both directions, isolating timing domains between clocked master and asynchronous slaves. Use Value: Eliminates bus contention via independent OE/LE control per direction and ensures setup/hold compliance (tsu = 3.5 ns, th = 2 ns) for 20+ MHz parallel bus operation. |
Use Scenario: Interfacing a microcontroller's external memory bus to SRAM or Flash devices with differing access timing requirements. IC Role / Device Role / Timing Role: Direction-controlled bus repeater with register staging to absorb timing skew between controller and memory, decoupling write strobe and read enable paths. Use Value: Enables reliable 16-bit data transfers at up to 25 MHz using tPLH/tPHL ≤ 3.8 ns and supports hot-swap-safe Hi-Z initialization via pullup-enabled OE pins. |
| Industrial PLC I/O Expansion | Test Equipment Signal Routing |
|
Use Scenario: Isolating and buffering digital I/O signals between CPU module and modular field I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Latched transceiver managing bidirectional status/command exchange with ESD-hardened I/O ports and fail-safe power-up Hi-Z behavior. Use Value: Industrial temperature rating (–40°C to +85°C), latch-up immunity (>500 mA), and robust 3-state control prevent lockup during transient faults or hot insertion. |
Use Scenario: Reconfigurable signal path switching in automated test equipment where multiple DUT interfaces share common stimulus/measurement resources. IC Role / Device Role / Timing Role: Programmable bus gate with independent direction latching, allowing dynamic reassignment of 16-bit data lanes without FPGA intervention. Use Value: Pin-level control of CE/LE/OE enables real-time path reconfiguration with <5 ns enable/disable transitions, supporting multi-DUT parallel testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT16543DGGR | Identical electrical specs and pinout; differs only in RoHS-compliance marking (G4 suffix denotes lead-free NiPdAu finish). | No functional difference; suitable for same industrial temperature and high-drive bus applications. | Select SN74ABT16543DGGRG4 when full RoHS compliance and J-STD-020 Level-1 reflow profile are required. |
| SN74ABT16543DLR | Same logic function and AC/DC specs, but in 56-pin SSOP (DL) package with 0.65-mm pitch and larger footprint (15.4 × 7.5 mm). | Used where board assembly prefers SSOP over TSSOP, or where thermal margin requires lower θJA (74°C/W vs. 81°C/W). | Choose SN74ABT16543DLR for legacy SSOP-compatible footprints or higher-power derating needs. |
Compared with SN74ABT16543DGGR and SN74ABT16543DLR, the 74ABT16543DGGRG4 offers identical logic performance in a space-optimized TSSOP package with enhanced surface-mount reliability and standardized lead-free finish, making it preferred for new high-density industrial designs.
Availability
74ABT16543DGGRG4 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded computing applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 74ABT16543DGGRG4 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-speed interface ICs and industrial-grade reliability.
The 74ABT16543DGGRG4 belongs to TI's Widebus™ family of advanced logic devices, designed specifically for high-performance, low-noise bus interfacing in industrial, communications, and computing systems demanding precise timing control and robust signal integrity.
FAQ
What is the recommended power-up sequence for 74ABT16543DGGRG4 to avoid bus contention?
During power-up, tie all OEAB and OEBA inputs to VCC through a pullup resistor (value determined by driver sink capability) to force outputs into high-impedance state before logic levels stabilize. This prevents unintended driving of the bus while VCC ramps. The 74ABT16543DGGRG4 does not include internal power-on reset, so external OE control is mandatory for safe initialization. Always verify OE assertion timing relative to VCC monotonicity in your system.
Does 74ABT16543DGGRG4 support hot-swap operation?
The 74ABT16543DGGRG4 supports hot-swap operation only when OE inputs are actively held high (Hi-Z) prior to and during insertion. Its absolute maximum ratings allow VCC = 0 V with VI/VO ≤ 4.5 V (Ioff ≤ ±100 µA), and its 3-state outputs prevent back-driving. However, no built-in hot-swap current limiting exists-external current-limiting resistors or dedicated hot-swap controllers are required for safe live insertion into powered backplanes.
How does the flow-through pinout of 74ABT16543DGGRG4 improve PCB layout?
The flow-through pinout places A-port inputs on one side and B-port outputs on the opposite side (and vice versa), enabling straight-layer signal routing without vias or layer jumps. For the 74ABT16543DGGRG4 in TSSOP-DGG, this reduces trace length by up to 40% versus traditional Z-pattern layouts, lowers crosstalk, and simplifies impedance-controlled routing for 16-bit parallel buses operating above 20 MHz.
Can 74ABT16543DGGRG4 be used as two independent 8-bit transceivers?
Yes-the 74ABT16543DGGRG4 contains two fully independent 8-bit sections (Section 1: A1–A8/B1–B8; Section 2: A9–A16/B9–B16), each with dedicated CEAB/CEBA, LEAB/LEBA, and OEAB/OEBA controls. This allows concurrent A→B and B→A transfers on separate 8-bit channels, or asymmetric use (e.g., Section 1 as 8-bit A→B only, Section 2 as 8-bit B→A only), maximizing flexibility in resource-constrained designs.
What is the maximum data rate supported by 74ABT16543DGGRG4 in a typical application?
Based on tPLH/tPHL ≤ 3.8 ns and tsu/th ≤ 3.5 ns/2 ns at 5 V, the 74ABT16543DGGRG4 supports reliable 16-bit parallel data transfer up to 25 MHz (40-ns cycle time) under standard 50-pF load conditions. System-level timing margins depend on trace length, termination, and noise; for >20 MHz operation, controlled-impedance routing and local decoupling near VCC pins are essential for the 74ABT16543DGGRG4.
74ABT16543DGGRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
74ABT16543DGGRG4 FAQ
1.How can I place an order for 74ABT16543DGGRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT16543DGGRG4 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 74ABT16543DGGRG4 reliable?
The price and inventory of 74ABT16543DGGRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT16543DGGRG4 is usually 5 days.
3.What payment methods are accepted for 74ABT16543DGGRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT16543DGGRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT16543DGGRG4?
74ABT16543DGGRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT16543DGGRG4 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 74ABT16543DGGRG4?
For technical support, including 74ABT16543DGGRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT16543DGGRG4 requirements.
6.How does Aetrix verify that 74ABT16543DGGRG4 is sourced from the original manufacturer or authorized distributors?
All 74ABT16543DGGRG4 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 74ABT16543DGGRG4 meets industry standards.
7.What is the process for return or replacement of 74ABT16543DGGRG4?
All 74ABT16543DGGRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT16543DGGRG4, 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 74ABT16543DGGRG4 part is unused and in its original packaging.
Return procedure for 74ABT16543DGGRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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