My Inquiry
My Account
Texas Instruments 74FCT162543ATPACT
- Part No.:
- 74FCT162543ATPACT
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74FCT162543ATPACT.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,118
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74FCT162543ATPACT from Texas Instruments is a 16-bit balanced-output latched transceiver in 56-pin TSSOP package, operating at 5V ±10% with industrial temperature range (−40°C to +85°C). It features 24 mA balanced output drivers, typical ground bounce <0.6 V, and propagation delay of 6.5 ns in transparent mode - optimized for driving transmission lines and high-speed bus interfaces in embedded control systems.
For engineers reviewing the 74FCT162543ATPACT datasheet, 74FCT162543ATPACT pinout, 74FCT162543ATPACT application, or 74FCT162543ATPACT equivalent, key selection criteria include IOFF partial-power-down support, edge-rate controlled outputs for noise reduction, latch enable/output enable independence per 8-bit bank, and compatibility with 5V TTL/CMOS logic families in space-constrained PCB layouts.
Technical Context
The 74FCT162543ATPACT implements two independent 8-bit D-type latched transceivers, each with dedicated Latch Enable (LEAB/LEBA) and Output Enable (OEAB/OEBA) controls, enabling bidirectional data flow with separate A-to-B and B-to-A timing paths. Its architecture supports simultaneous latching and three-state output control without internal contention.
It integrates current-limiting resistors in 24 mA balanced output drivers to minimize undershoot and reduce need for external termination. The IOFF circuitry disables outputs during power-down to prevent backflow current, and edge-rate control circuitry ensures significantly improved noise characteristics versus standard FCT devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC | 5 V ±10% - compatible with standard 5V logic rails; no level-shifting required in legacy industrial systems. |
| Propagation Delay (transparent) | 6.5 ns max - enables reliable operation in 100+ MHz bus clock domains with sufficient setup/hold margin. |
| Output Drive | ±24 mA balanced - reduces ground bounce (<0.6 V typical) and eliminates need for external series termination on PCB traces. |
| Operating Temperature | −40°C to +85°C - qualified for industrial automation, motor control, and outdoor embedded applications. |
| IOFF Support | Yes - prevents damaging current backflow when VCC = 0 V, enabling safe hot-swap and partial-power-down system design. |
| Package | TSSOP-56 (DGG), 240-mil width - 0.5 mm pitch, 1.2 mm max height; suitable for high-density routing and automated SMT assembly. |
| ESD Rating | >2000 V (HBM) - meets industrial handling requirements without additional protection circuitry. |
Pinout & Package
74FCT162543ATPACT is housed in a 56-pin Thin Shrunk Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 0.5 mm lead pitch, 13.9–14.1 mm body width, and 1.2 mm maximum height. Pin 1 identifier located at top-left corner with beveled corner marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 1OEBA, 2OEAB, 2OEBA | A↔B Output Enable (active LOW) | Independent three-state control per 8-bit bank; allows dynamic bus isolation without affecting latched data. |
| 1CEAB, 1CEBA, 2CEAB, 2CEBA | A↔B Data Flow Enable (active LOW) | Gates input capture path; must be LOW to load data into latches or drive outputs from stored values. |
| 1LEAB, 1LEBA, 2LEAB, 2LEBA | A↔B Latch Enable (active LOW) | Edge-triggered storage: LOW-to-HIGH transition captures A or B inputs; subsequent changes ignored until next LE pulse. |
| A1–A8, B1–B8 (x2 banks) | Bidirectional I/O terminals | Shared pins serve as inputs (when CE active, OE inactive) or three-state outputs (when CE and OE active); no internal direction register. |
| VCC, GND (x4 each) | Power and ground distribution | Multiple VCC/GND pairs minimize switching noise and improve PSRR across high-speed 16-bit operation. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces EMI and crosstalk in dense PCB layouts by limiting slew rate without compromising propagation delay. |
| 24 mA balanced drivers | Enables direct drive of 50 Ω transmission lines with minimal reflection and <0.6 V ground bounce at 5V supply. |
| IOFF partial-power-down | Prevents back-current flow when VCC = 0 V, supporting safe power sequencing in multi-rail systems. |
| Independent 8-bit control | Two fully decoupled banks allow asymmetric data flow - e.g., A→B latched while B→A remains transparent. |
| Industrial temperature range | Validated operation from −40°C to +85°C ensures reliability in factory-floor PLCs, motor drives, and telecom line cards. |
Applications
| Industrial Backplane Interface | Programmable Logic Controller (PLC) I/O Module |
|---|---|
Use Scenario: Bidirectional data transfer between FPGA-based controller and isolated I/O expansion cards over 15 cm routed parallel bus. IC Role / Device Role / Timing Role: Latched transceiver providing synchronized, noise-immune data handoff with independent enable controls per 8-bit segment. Use Value: 6.5 ns propagation delay and edge-rate control ensure signal integrity at 25 MHz bus clock; IOFF enables safe hot-plug insertion. |
Use Scenario: Interfacing microcontroller host to modular analog/digital I/O cards via shared 16-bit address/data bus. IC Role / Device Role / Timing Role: Level-shifter and bus isolator with latch function to decouple slow CPU timing from fast peripheral response. Use Value: 24 mA drivers drive long traces without external termination; independent OE/LE per bank supports staggered read/write cycles. |
| Automated Test Equipment (ATE) Signal Routing | Legacy System Bus Extender |
Use Scenario: Multiplexing test signals between DUT interface and pattern generator using programmable latch timing. IC Role / Device Role / Timing Role: Precision-controlled bidirectional latch enabling deterministic signal capture and replay with sub-ns skew. Use Value: Typical output skew <0.5 ns and 2.0 ns setup/hold times allow tight timing closure in 100 MHz test vectors. |
Use Scenario: Extending ISA or VMEbus segments across multiple PCBs in retrofitted industrial control cabinets. IC Role / Device Role / Timing Role: High-drive buffer and direction-controlled repeater preserving TTL logic levels across >30 cm interconnects. Use Value: 5V-compatible I/O, 6.5 ns delay, and robust ESD (>2000 V) withstand harsh cabinet EMI environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar latched transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT16543ATPACT | 64 mA sink / 32 mA source drive; higher ground bounce (typ. 1.0 V); no current-limiting resistors | Better suited for driving heavy capacitive loads (e.g., backplanes), less ideal for transmission-line matching | Select when interfacing to high-CL buses where speed margin compensates for increased noise. |
| 74FCT162H543ATPACT | Includes bus-hold circuitry on all data inputs; retains last state during high-Z; same 24 mA drive | Eliminates external pull-up/down resistors on floating control buses; adds ~1 µA input leakage | Choose for unbuffered control lines or intermittent bus activity where input stability is critical. |
Compared with CY74FCT16543ATPACT, the 74FCT162543ATPACT delivers lower ground bounce and better transmission-line drive but reduced sink strength; versus 74FCT162H543ATPACT, it lacks bus-hold but offers identical drive and timing - making it optimal for actively driven, noise-sensitive interconnects.
Availability
74FCT162543ATPACT is available at Aetrix Electronics and suitable for industrial automation, programmable logic controller (PLC) I/O modules, and automated test equipment (ATE) requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 74FCT162543ATPACT 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-reliability industrial ICs.
The 74FCT162543ATPACT belongs to TI's FCT logic family, designed specifically for noise-critical, high-speed 5V digital systems requiring precise timing control, low ground bounce, and robust power-down behavior.
FAQ
What is the maximum operating frequency supported by the 74FCT162543ATPACT?
The 74FCT162543ATPACT does not specify a maximum clock frequency directly, but its 6.5 ns maximum propagation delay in transparent mode supports reliable operation in bus systems up to approximately 100 MHz (with adequate setup/hold margins). For latch-controlled operation, the minimum LE pulse width is 4.0 ns, enabling use in high-speed synchronous designs where data is captured on clean edges.
Does the 74FCT162543ATPACT support mixed-voltage operation (e.g., 3.3V inputs with 5V VCC)?
No - the 74FCT162543ATPACT is a 5V-only device. Its input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output voltage specs (VOL ≤ 0.55 V at 24 mA, VOH ≥ 2.4 V) are defined strictly for 5V ±10% supply. Applying 3.3V logic signals directly may result in marginal or non-functional switching; level translation is required for interfacing with 3.3V systems.
How does the IOFF feature of the 74FCT162543ATPACT protect the system during power-down?
The IOFF circuitry in the 74FCT162543ATPACT automatically disables all outputs when VCC drops below functional threshold (including at 0 V), preventing reverse current flow from live bus lines into the powered-down device. This avoids latch-up risk and protects upstream drivers - critical in modular systems where boards may be inserted or removed while other sections remain powered.
Can the 74FCT162543ATPACT be used without external termination resistors on PCB traces?
Yes - the integrated current-limiting resistors in its 24 mA balanced output drivers provide inherent impedance matching for typical 50 Ω PCB traces, reducing reflections and eliminating need for discrete series termination. This simplifies layout and improves signal integrity in point-to-point or short-drop multidrop configurations, though stub length and topology still require validation per application.
What is the pin compatibility status between 74FCT162543ATPACT and CY74FCT16543ATPACT?
The 74FCT162543ATPACT and CY74FCT16543ATPACT share identical pinout, package (TSSOP-56), and functional block diagram - both are drop-in replacements at the board level. However, they differ electrically: the 74FCT162543ATPACT uses balanced 24 mA drivers with lower ground bounce, while CY74FCT16543ATPACT provides asymmetric 64 mA sink / 32 mA source drive. No PCB changes are required, but timing and drive behavior must be re-validated.
74FCT162543ATPACT 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
74FCT162543ATPACT FAQ
1.How can I place an order for 74FCT162543ATPACT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT162543ATPACT 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 74FCT162543ATPACT reliable?
The price and inventory of 74FCT162543ATPACT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT162543ATPACT is usually 5 days.
3.What payment methods are accepted for 74FCT162543ATPACT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT162543ATPACT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT162543ATPACT?
74FCT162543ATPACT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT162543ATPACT 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 74FCT162543ATPACT?
For technical support, including 74FCT162543ATPACT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT162543ATPACT requirements.
6.How does Aetrix verify that 74FCT162543ATPACT is sourced from the original manufacturer or authorized distributors?
All 74FCT162543ATPACT 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 74FCT162543ATPACT meets industry standards.
7.What is the process for return or replacement of 74FCT162543ATPACT?
All 74FCT162543ATPACT units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT162543ATPACT, 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 74FCT162543ATPACT part is unused and in its original packaging.
Return procedure for 74FCT162543ATPACT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74FCT162543ATPACT Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
