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Texas Instruments 74FCT162H543CTPACT
- Part No.:
- 74FCT162H543CTPACT
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74FCT162H543CTPACT.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,295
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Product details
Overview
74FCT162H543CTPACT from Texas Instruments is a 16-bit latched transceiver with bus-hold inputs, 24 mA balanced output drivers, 5.1 ns propagation delay (transparent mode), and TSSOP-56 package. It operates at 5V ±10% across −40°C to +85°C and eliminates external pull-up/down resistors in high-density data bus applications such as industrial PLC backplanes and memory interface buffers.
For engineers reviewing the 74FCT162H543CTPACT datasheet, 74FCT162H543CTPACT pinout, 74FCT162H543CTPACT application, or 74FCT162H543CTPACT equivalent, key selection criteria include bus-hold functionality, 24 mA drive strength, Ioff partial-power-down support, and compatibility with 5V TTL/CMOS logic families in space-constrained industrial control systems.
Technical Context
This device implements two independent 8-bit D-type latched transceivers with separate Latch Enable (LEAB/LEBA) and Output Enable (OEAB/OEBA) controls per direction, enabling bidirectional flow-through data routing. Its bus-hold circuitry actively retains the last valid logic state on all A- and B-side data inputs when driven high-impedance, preventing floating nodes without external biasing.
The 24 mA balanced output drivers incorporate internal current-limiting resistors to minimize ground bounce (<0.6 V typical VOLP) and reduce need for external termination-critical for driving transmission lines and low-impedance backplanes while maintaining signal integrity under fast switching conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 5 V ±10% - supports standard 5V TTL/CMOS system rails with margin for supply variation |
| Propagation Delay | 5.1 ns max (transparent mode) - enables high-speed data transfer in real-time industrial interfaces |
| Output Drive | ±24 mA - sufficient to drive 50-Ω transmission lines or multiple CMOS loads without external buffers |
| Bus-Hold Current | ±1 mA typical - maintains stable input state during tri-state periods, removing need for 4.7-kΩ pull resistors |
| Ioff Support | Active at VCC = 0 V - prevents backflow current during partial power-down, protecting powered subsystems |
| ESD Rating | >2000 V HBM - ensures robustness against handling and board-level electrostatic discharge events |
| Operating Temp | −40°C to +85°C - qualified for extended industrial environments including factory automation and motor drives |
Pinout & Package
74FCT162H543CTPACT is housed in a 56-pin Thin Shrunk Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 0.5 mm pitch, 13.9–14.1 mm body width, and 1.2 mm max height. Pin 1 identifier located at top-left corner (Q1 quadrant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 1OEBA, 2OEAB, 2OEBA | A↔B Output Enable (active LOW) | Controls three-state output buffers independently per 8-bit channel; enables bidirectional isolation |
| 1CEAB, 1CEBA, 2CEAB, 2CEBA | A↔B Enable (active LOW) | Gates data flow direction; must be LOW to allow latch transparency or output activation |
| 1LEAB, 1LEBA, 2LEAB, 2LEBA | A↔B Latch Enable (active LOW) | Configures latches as transparent (LOW) or storage (LOW→HIGH edge); defines data capture timing |
| A1–A16, B1–B16 | Bidirectional Data I/O | Bus-hold enabled on all pins; retains last valid logic level when un-driven, eliminating floating inputs |
| VCC, GND (×4 each) | Power & Ground | Distributed supply/ground pins reduce simultaneous switching noise and improve decoupling effectiveness |
Key Features
| Feature | Design Value |
|---|---|
| Bus-Hold Inputs | Retains last active logic state on all 32 data pins without external resistors-reduces BOM count and PCB area |
| 24 mA Balanced Outputs | Matched sourcing/sinking capability minimizes ground bounce and undershoot on shared return paths |
| Ioff Partial-Power-Down | Disables outputs at VCC = 0 V, preventing damaging current flow between powered/unpowered system domains |
| Edge-Rate Control | Controlled slew rate reduces EMI and crosstalk in dense routing environments like multi-layer backplanes |
| Industrial Temp Range | −40°C to +85°C operation validated across full voltage range-suitable for harsh factory-floor deployments |
Applications
| Industrial PLC Backplane Interface | Memory Expansion Bus Buffer |
|---|---|
Use Scenario: Bidirectional data transfer between CPU module and I/O expansion cards in modular programmable logic controllers. IC Role / Device Role / Timing Role: Latched transceiver providing isolated, direction-controlled 16-bit data path with bus-hold protection during hot-swap events. Use Value: Eliminates need for external pull resistors on 32 bus lines, reducing component count and improving reliability during card insertion/removal. | Use Scenario: Interfacing microcontroller address/data buses to external SRAM or Flash memory arrays in embedded controllers. IC Role / Device Role / Timing Role: High-speed latch-based buffer isolating memory access timing from CPU core clock domain. Use Value: 5.1 ns propagation delay and 24 mA drive ensure setup/hold timing margins are met even at 20 MHz bus frequencies. |
| Automated Test Equipment (ATE) Signal Routing | Motor Drive Controller Data Hub |
Use Scenario: Multiplexing test signals between DUT interface boards and measurement instrumentation in rack-mounted ATE systems. IC Role / Device Role / Timing Role: Directionally configurable transceiver enabling flexible signal path reconfiguration via FPGA-controlled OE/LE signals. Use Value: Independent LE/OE controls per 8-bit segment allow precise timing alignment of stimulus/response data streams. | Use Scenario: Aggregating sensor feedback (encoder, current sense) and distributing control commands (PWM enable, fault flags) across multi-axis servo drives. IC Role / Device Role / Timing Role: Robust 16-bit data hub with bus-hold preserving command integrity during transient power faults or reset sequences. Use Value: Prevents spurious motor activation due to floating inputs during brown-out conditions-enhances functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar latched transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74FCT162543CTPACT | No bus-hold; identical 24 mA drive, 5.1 ns speed, TSSOP-56 package | Requires external pull-up/down resistors on all data lines; higher BOM cost and layout complexity | Select when bus-hold is unnecessary and legacy design reuse is prioritized |
| 74FCT16543CTPACT | 64 mA sink / 32 mA source drive; no bus-hold; higher ground bounce (1.0 V typical VOLP) | Better suited for high-capacitance loads (e.g., long traces, multiple loads); not optimized for transmission-line termination | Select when driving >100 pF loads or backplane stubs where stronger drive is required |
Compared with 74FCT162543CTPACT and 74FCT16543CTPACT, the 74FCT162H543CTPACT uniquely integrates bus-hold to eliminate external biasing while maintaining 24 mA balanced drive and lowest ground bounce-making it optimal for compact, high-reliability industrial bus interfaces where input stability is critical.
Availability
74FCT162H543CTPACT is available at Aetrix Electronics and suitable for industrial PLC backplanes, memory expansion interfaces, and motor drive controller data hubs requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for 74FCT162H543CTPACT 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 delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The 74FCT162H543CTPACT belongs to TI's FCT logic family-designed specifically for high-speed, low-noise 5V system interfacing with enhanced drive strength, bus-hold, and partial-power-down capability.
FAQ
What is the maximum propagation delay of the 74FCT162H543CTPACT in transparent mode?
The 74FCT162H543CTPACT has a maximum propagation delay of 5.1 ns in transparent mode (A-to-B or B-to-A), measured under industrial temperature range (−40°C to +85°C) and VCC = 4.5 V. This value is specified in the "Switching Characteristics" table of the official Texas Instruments datasheet SCCS059B, ensuring timing predictability in real-time control loops.
Does the 74FCT162H543CTPACT require external pull-up or pull-down resistors on its data inputs?
No, the 74FCT162H543CTPACT does not require external pull-up or pull-down resistors because it integrates bus-hold circuitry on all A- and B-side data inputs. As stated in the Functional Description section of the datasheet, this feature actively retains the last valid logic state when inputs float, eliminating the need for discrete biasing components and simplifying PCB layout.
What package type and dimensions does the 74FCT162H543CTPACT use?
The 74FCT162H543CTPACT uses a 56-pin Thin Shrunk Small Outline Package (TSSOP) with JEDEC MO-153 compliance, 0.5 mm lead pitch, 13.9–14.1 mm body width, and 1.2 mm maximum height. Its package drawing code is DGG, and it is RoHS-compliant with Green (no Sb/Br) finish and CU NIPDAU lead finish, per TI's Package Option Addendum.
How does the Ioff feature of the 74FCT162H543CTPACT protect system-level power domains?
The Ioff feature of the 74FCT162H543CTPACT disables all outputs when VCC = 0 V, preventing damaging current backflow from powered sections into unpowered ones. As confirmed in the datasheet's "Functional Description", this allows safe partial-power-down operation-critical in mixed-voltage systems like industrial controllers where subsystems may power up/down asynchronously without risking latch-up or overstress.
What is the output drive capability of the 74FCT162H543CTPACT, and how does it compare to standard TTL?
The 74FCT162H543CTPACT provides ±24 mA balanced output drive per pin, exceeding standard TTL (±16 mA) and enabling direct drive of 50-Ω transmission lines or multiple CMOS loads. Per the "Output Drive Characteristics" table in SCCS059B, this balanced sourcing/sinking reduces ground bounce to <0.6 V typical-significantly lower than the 1.0 V typical of the non-balanced 74FCT16543CTPACT variant.
74FCT162H543CTPACT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 56-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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
74FCT162H543CTPACT FAQ
1.How can I place an order for 74FCT162H543CTPACT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT162H543CTPACT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of 74FCT162H543CTPACT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT162H543CTPACT is usually 5 days.
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Once your 74FCT162H543CTPACT order is processed, you will receive an email with the shipment details and tracking number.
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5.How can I obtain technical support or documentation for 74FCT162H543CTPACT?
For technical support, including 74FCT162H543CTPACT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT162H543CTPACT requirements.
6.How does Aetrix verify that 74FCT162H543CTPACT is sourced from the original manufacturer or authorized distributors?
All 74FCT162H543CTPACT 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 74FCT162H543CTPACT meets industry standards.
7.What is the process for return or replacement of 74FCT162H543CTPACT?
All 74FCT162H543CTPACT units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT162H543CTPACT, 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 74FCT162H543CTPACT part is unused and in its original packaging.
Return procedure for 74FCT162H543CTPACT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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