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Texas Instruments 74FCT16245TPACTE4
- Part No.:
- 74FCT16245TPACTE4
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74FCT16245TPACTE4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
74FCT16245TPACTE4 from Texas Instruments is a 16-bit non-inverting bus transceiver with direction control (DIR) and three-state output enable (OE), designed for bidirectional synchronous communication between two buses. It delivers 64 mA sink / 32 mA source drive capability, supports Ioff partial-power-down mode, operates at 5V ±10%, and features typical output skew <250 ps - ideal for driving high-capacitance backplanes in industrial control systems.
For engineers reviewing the 74FCT16245TPACTE4 datasheet, 74FCT16245TPACTE4 pinout, 74FCT16245TPACTE4 application, or 74FCT16245TPACTE4 equivalent, this device is selected for high-speed, low-noise data transfer in 48-pin TSSOP-packaged embedded interconnects requiring robust ground-bounce suppression (VOLP <1.0 V) and industrial temperature operation (–40°C to +85°C).
Technical Context
The 74FCT16245TPACTE4 implements dual 8-bit transceiver blocks (A↔B), each controlled by independent DIR and OE signals. Data flow direction is determined solely by DIR level (LOW = B→A, HIGH = A→B), while OE (active LOW) enables/disables outputs into high-impedance state. Its Ioff circuitry ensures no current backflow when VCC = 0 V, enabling safe hot-insertion in partial-power-down systems.
It uses FCT logic family silicon with edge-rate control to minimize switching noise and ESD protection >2000 V. Unlike CY74FCT162245T or CY74FCT162H245T variants, it lacks bus-hold or balanced 24-mA drivers - instead optimized for maximum drive strength (64 mA sink) and backplane loading, with propagation delay up to 7.0 ns (tPLH/tPHL) and output enable/disable times ≤9.5 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails; no external regulator needed. |
| Drive Strength | 64 mA sink / 32 mA source per output - sufficient to drive heavy capacitive loads (e.g., >100 pF traces or backplanes) without external buffers. |
| Propagation Delay | 1.5–7.0 ns (A↔B) - supports system clock rates up to ~140 MHz in short-path configurations. |
| Output Skew | <250 ps typical - ensures tight timing alignment across all 16 bits, critical for parallel bus integrity. |
| Ground Bounce (VOLP) | <1.0 V at VCC = 5 V, TA = 25°C - reduces false triggering on shared ground planes in dense PCB layouts. |
| Ioff Support | Active at VCC = 0 V - prevents damaging back-current during live insertion or power sequencing in modular systems. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and motor control cabinets. |
Pinout & Package
74FCT16245TPACTE4 is housed in a 48-pin Thin Shrunk Small Outline Package (TSSOP), 12.6 mm × 6.2 mm × 1.2 mm max height, 0.5 mm pitch, JEDEC MO-153 compliant, with exposed pad not present. Pin 1 marked via corner chamfer; pins numbered counterclockwise from top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control inputs (per 8-bit bank) | Set data flow direction: LOW = B→A, HIGH = A→B; asynchronous, no internal debouncing. |
| 1OE, 2OE | Three-state output enable (active LOW) | Enable outputs when LOW; force high-impedance when HIGH - isolates both A and B buses simultaneously per bank. |
| 1A1–1A8, 2A1–2A8 | Port A data terminals (bidirectional) | Connect to local bus (e.g., microcontroller data bus); function as inputs or three-state outputs depending on DIR/OE state. |
| 1B1–1B8, 2B1–2B8 | Port B data terminals (bidirectional) | Connect to remote bus (e.g., peripheral or memory bus); mirror A-side behavior under DIR control. |
| VCC (Pins 24, 25, 47, 48) | Power supply | Four dedicated VCC pins reduce IR drop and improve noise immunity across wide package; decoupling required at each pair. |
| GND (Pins 12, 13, 26, 27, 39, 40) | Ground reference | Six GND pins provide low-inductance return paths - essential for maintaining VOLP spec and signal integrity at high drive strength. |
Key Features
| Feature | Design Value |
|---|---|
| Ioff partial-power-down support | Enables safe operation during hot-swap or mixed-voltage board bring-up without latch-up risk or backfeed damage. |
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) and EMI emissions - eliminates need for series termination in many routing scenarios. |
| High sink current (64 mA) | Drives long traces, unterminated stubs, or multiple TTL loads directly - avoids external line drivers in backplane applications. |
| Low ground bounce (<1.0 V) | Maintains valid logic thresholds under heavy transient load - prevents metastability in adjacent synchronous logic. |
| Industrial temperature range | Validated operation from –40°C to +85°C - suitable for uncontrolled enclosures in PLCs, CNC controllers, and power electronics. |
Applications
| Industrial Backplane Interconnect | Microcontroller Bus Expansion |
|---|---|
|
Use Scenario: Bidirectional data transfer between a main CPU module and I/O expansion cards across a 16-bit parallel backplane with >80 pF trace capacitance. IC Role / Device Role / Timing Role: Level-shifting, bus-isolating transceiver that buffers and directs data flow under DIR/OE control with sub-7 ns latency. Use Value: Eliminates need for discrete buffer arrays; 64 mA sink handles backplane loading without signal degradation or added termination. |
Use Scenario: Extending an MCU's 16-bit data bus to external SRAM or FPGA configuration memory in space-constrained industrial HMI designs. IC Role / Device Role / Timing Role: Synchronous bus repeater enabling longer trace lengths while preserving setup/hold margins via matched skew <250 ps. Use Value: Enables reliable 10+ MHz parallel memory access without timing closure issues caused by trace mismatch or ground bounce. |
| Programmable Logic Interface | Legacy System Bus Bridge |
|
Use Scenario: Connecting a CPLD or FPGA I/O bank to a legacy ISA-style peripheral bus operating at 5 V TTL levels. IC Role / Device Role / Timing Role: Voltage-compatible, direction-controlled transceiver providing isolation and drive strength matching between modern logic and legacy peripherals. Use Value: Replaces discrete transistor arrays; Ioff allows FPGA reconfiguration while peripheral bus remains powered. |
Use Scenario: Bridging a 16-bit host processor bus to a secondary subsystem (e.g., analog I/O card) in retrofit industrial controllers. IC Role / Device Role / Timing Role: Isolatable bidirectional data conduit with independent enable per 8-bit segment - supports staggered bus arbitration. Use Value: Enables modular upgrades without redesigning core motherboard; OE control permits dynamic bus sharing between subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT162245TPACT | 24 mA balanced drive, lower ground bounce (VOLP <0.6 V), no Ioff support | Better suited for transmission-line routing (e.g., point-to-point LVDS-adjacent traces); less appropriate for high-capacitance backplanes | Select when minimizing SSN dominates over drive strength - especially in high-density signal layers with strict EMI limits. |
| CY74FCT162H245TPACT | 24 mA drive + bus-hold on all inputs, eliminates external pull-ups, no Ioff | Ideal for floating-input scenarios (e.g., unpopulated daughterboard slots); adds input state retention but reduces max sink capability | Choose for systems with intermittent or removable modules where input stability during disconnection is critical. |
Compared with CY74FCT162245TPACT and CY74FCT162H245TPACT, the 74FCT16245TPACTE4 prioritizes raw drive strength and Ioff safety over noise optimization or bus-hold convenience - making it the only option among the three qualified for direct backplane driving and hot-swap-capable architectures.
Availability
74FCT16245TPACTE4 is available at Aetrix Electronics and suitable for industrial backplane interconnects, microcontroller bus expansion, programmable logic interfaces, and legacy system bus bridge applications requiring stable component supply across extended product lifecycles.
Supply support for 74FCT16245TPACTE4 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 with emphasis on reliability, longevity, and industrial-grade qualification.
The 74FCT16245TPACTE4 belongs to TI's FCT logic family - engineered specifically for high-speed, low-noise, 5-V bidirectional bus interfacing in industrial and communications infrastructure equipment.
FAQ
What is the maximum capacitive load the 74FCT16245TPACTE4 can reliably drive?
The 74FCT16245TPACTE4 is characterized to drive high-capacitance loads up to 100–150 pF per output while maintaining VOLP <1.0 V and tPLH/tPHL ≤7.0 ns. Its 64 mA sink capability enables stable operation into unterminated backplanes or long parallel traces - verified per TI's application note SCBA051 on FCT bus transceivers. For loads exceeding 150 pF, external series termination or reduced slew rate may be required.
Does the 74FCT16245TPACTE4 support hot-swap or partial-power-down operation?
Yes, the 74FCT16245TPACTE4 integrates Ioff circuitry that disables outputs when VCC = 0 V, preventing damaging current backflow during live insertion or staged power sequencing. This feature is fully specified per TI's FCT family guidelines and validated across the industrial temperature range - making it suitable for modular chassis systems where boards are inserted/removed under power.
How does the 74FCT16245TPACTE4 differ from the CY74FCT162245TPACT variant?
The 74FCT16245TPACTE4 provides higher drive strength (64 mA sink vs. 24 mA), no bus-hold inputs, and explicit Ioff support - whereas CY74FCT162245TPACT offers balanced 24 mA drivers with lower ground bounce (<0.6 V) but lacks Ioff. The 74FCT16245TPACTE4 is optimized for backplane loading; CY74FCT162245TPACT targets low-noise point-to-point links.
What is the pin-compatible replacement for the 74FCT16245TPACTE4 if discontinued?
No pin-compatible drop-in replacement exists within TI's active portfolio. The closest functional alternatives - CY74FCT162245TPACT and CY74FCT162H245TPACT - share the same 48-pin TSSOP footprint but differ electrically (drive strength, Ioff, bus-hold). Migration requires validation of sink current, power-down behavior, and input biasing in the target application.
Is the 74FCT16245TPACTE4 RoHS compliant and lead-free?
Yes, the 74FCT16245TPACTE4 is RoHS compliant and features lead-free (Pb-free) terminations with NiPdAu plating, consistent with TI's packaging standards for the DGG (TSSOP) package. MSL rating is Level 3 per JEDEC J-STD-020, with peak reflow temperature of 260°C - confirmed in TI's official packaging addendum dated January 2026.
74FCT16245TPACTE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 48-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:
- 48-TSSOP
74FCT16245TPACTE4 FAQ
1.How can I place an order for 74FCT16245TPACTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT16245TPACTE4 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 74FCT16245TPACTE4 reliable?
The price and inventory of 74FCT16245TPACTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT16245TPACTE4 is usually 5 days.
3.What payment methods are accepted for 74FCT16245TPACTE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT16245TPACTE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT16245TPACTE4?
74FCT16245TPACTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT16245TPACTE4 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 74FCT16245TPACTE4?
For technical support, including 74FCT16245TPACTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT16245TPACTE4 requirements.
6.How does Aetrix verify that 74FCT16245TPACTE4 is sourced from the original manufacturer or authorized distributors?
All 74FCT16245TPACTE4 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 74FCT16245TPACTE4 meets industry standards.
7.What is the process for return or replacement of 74FCT16245TPACTE4?
All 74FCT16245TPACTE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT16245TPACTE4, 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 74FCT16245TPACTE4 part is unused and in its original packaging.
Return procedure for 74FCT16245TPACTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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