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Texas Instruments 74FCT162H952ETPAC
- Part No.:
- 74FCT162H952ETPAC
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
74FCT162H952ETPAC.pdf
- Description:
- BUS TRANSCEIVER, FCT SERIES
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Product details
Overview
74FCT162H952ETPAC from Texas Instruments is a 16-bit registered transceiver with bus-hold inputs, 24 mA balanced output drivers, and TSSOP-56 packaging. It operates at 5V ±10%, supports industrial temperature range (–40°C to +85°C), and delivers typical propagation delay of 6.3 ns and output skew <0.5 ns. It is used in high-speed bidirectional data bus interfacing between microprocessors and peripheral subsystems.
For engineers reviewing the 74FCT162H952ETPAC datasheet, 74FCT162H952ETPAC pinout, 74FCT162H952ETPAC application, or 74FCT162H952ETPAC equivalent, this page provides verified technical context, real-world timing and drive specifications, package mapping to TSSOP-56, confirmed bus-hold behavior, and two validated alternative parts for system-level bus interface design.
Technical Context
This device implements dual 8-bit registered transceivers sharing common control lines (CEAB/CEBA, CLKAB/CLKBA, OEAB/OEBA) to achieve full 16-bit bidirectional data flow. Each direction uses edge-triggered clocking with separate enable and clock-enable logic, supporting synchronous A-to-B and B-to-A transfers.
It integrates bus-hold circuitry on all data inputs (A and B pins), eliminating external pull resistors by latching the last valid logic state during high-impedance conditions. Its 24 mA balanced drivers reduce ground bounce (typical VOLP <0.6 V) and minimize transmission-line reflections without requiring external termination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails and avoids level-shifting in 5V systems. |
| Propagation Delay | 6.3 ns max (CLK to Q) - enables reliable operation in high-speed bus cycles up to ~80 MHz. |
| Output Drive | ±24 mA - sufficient to drive 50-Ω transmission lines or capacitive loads up to 100 pF without signal integrity degradation. |
| Bus-Hold Current | ±50 µA sustain current - actively maintains input state during floating conditions, preventing metastability in hot-swap or unconnected bus scenarios. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor control, PLC backplanes, and instrumentation interfaces. |
| Ioff Support | Yes - disables outputs during partial power-down, blocking reverse current flow when VCC = 0 V. |
| ESD Rating | >2000 V HBM - protects against handling damage during board assembly and field maintenance. |
Pinout & Package
74FCT162H952ETPAC is packaged in a 56-pin Thin Shrink Small Outline Package (TSSOP) with 0.5 mm pitch, 13.9 × 6.0 mm body size, and 1.2 mm max height per JEDEC MO-153. Pin 1 is marked by a beveled corner and located in Quadrant 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OEAB, OEBA | A-to-B / B-to-A Output Enable (Active LOW) | Tri-states respective output banks independently - enables bidirectional bus arbitration without contention. |
| CEAB, CEBA | A-to-B / B-to-A Clock Enable (Active LOW) | Gates clock sampling - allows dynamic gating of register updates without disrupting clock distribution network. |
| CLKAB, CLKBA | A-to-B / B-to-A Register Clock Inputs | Edge-triggered (LOW-to-HIGH) - synchronizes data capture to precise system timing edges for deterministic latency. |
| A1–A16, B1–B16 | Bidirectional Data Terminals | Bus-hold enabled on all - eliminates need for 10-kΩ pull-up/down resistors on unused or intermittently connected data lines. |
| VCC, GND | Power and Ground | Multiple VCC/GND pairs distributed across package - reduces simultaneous switching noise and improves PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Bus-Hold Inputs | Maintains last valid logic state on all A/B data pins during high-impedance conditions - prevents floating inputs and eliminates external biasing components. |
| 24 mA Balanced Outputs | Matched sourcing/sinking capability minimizes ground bounce (VOLP <0.6 V) and ensures clean signal edges on unterminated PCB traces. |
| Ioff Partial-Power-Down | Outputs disable safely when VCC = 0 V - prevents back-driving powered sections during hot-insertion or staged power sequencing. |
| Edge-Rate Control | Internal slew-rate limiting reduces EMI and crosstalk in dense routing environments without external RC networks. |
Applications
| Industrial Backplane Interface | Microprocessor Local Bus Extension |
|---|---|
Use Scenario: Interfacing a 16-bit microcontroller to an isolated I/O expansion module over a 150-mm PCB backplane trace. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, noise-immune data transfer with bus-hold protection during module insertion/removal. Use Value: Eliminates 32 external pull resistors and guarantees stable input states during hot-swap events, reducing BOM count and improving system reliability. | Use Scenario: Extending a legacy 80C188-based controller's address/data bus to support additional SRAM and peripheral ICs. IC Role / Device Role / Timing Role: Bidirectional registered buffer adding setup/hold margin and driving 80-pF net capacitance with sub-7 ns propagation. Use Value: Enables reliable 16-bit data transfers at 12 MHz without timing closure issues or signal integrity degradation. |
| Test Equipment Digital I/O Module | Programmable Logic Controller (PLC) I/O Carrier |
Use Scenario: Providing configurable digital I/O channels in automated test equipment where signal integrity and input stability are critical. IC Role / Device Role / Timing Role: Level-shifting and bus-isolation transceiver with bus-hold ensuring known states during reconfiguration sequences. Use Value: Prevents spurious toggling during FPGA reprogramming windows, avoiding false triggers in downstream measurement circuits. | Use Scenario: Isolating CPU-side logic from field-side 24 V digital inputs/outputs in modular PLC carrier boards. IC Role / Device Role / Timing Role: Synchronized interface element buffering data between isolated 5 V logic domains and optocoupled field interfaces. Use Value: Delivers deterministic 6.3 ns latency and robust noise immunity in electrically noisy factory-floor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT162952BTPVC | Same 24 mA drive and bus-hold, but SSOP-56 (25-mil pitch); 7.5 ns max propagation delay. | Requires PCB layout change due to larger SSOP footprint and different thermal profile. | Preferred when SSOP is already standardized in production and slightly relaxed timing is acceptable. |
| CY74FCT162H952CTPACT | Identical functionality and bus-hold, same TSSOP-56 package, but faster 6.3 ns speed grade and active tape-and-reel (2000 pcs). | No layout or firmware changes needed; direct functional replacement with improved timing margin. | Recommended for new designs requiring guaranteed 6.3 ns performance and volume availability. |
Compared with 74FCT162H952ETPAC, CY74FCT162952BTPVC offers identical electrical behavior in a legacy SSOP package but trades timing for compatibility, while CY74FCT162H952CTPACT delivers identical form-factor and enhanced speed with production-ready packaging - making it the optimal drop-in upgrade path.
Availability
74FCT162H952ETPAC is available at Aetrix Electronics and suitable for industrial backplane interfaces, microprocessor bus extensions, test equipment I/O modules, and PLC carrier designs requiring stable component supply across extended product lifecycles.
Supply support for 74FCT162H952ETPAC 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The 74FCT162H952ETPAC belongs to TI's FCT logic family, engineered for high-speed, low-noise 5V bus interfacing in industrial control and instrumentation systems where signal integrity and input stability are critical.
FAQ
What is the function of the bus-hold feature in the 74FCT162H952ETPAC?
The bus-hold feature in the 74FCT162H952ETPAC actively retains the last valid logic state on all A and B data inputs when those pins float to high impedance. It draws ±50 µA sustain current to maintain stable voltage levels, eliminating the need for external pull-up or pull-down resistors. This prevents undefined states during hot-swap events, unconnected test points, or tri-stated upstream drivers - a key reliability enhancement in industrial backplane and modular I/O applications using the 74FCT162H952ETPAC.
Does the 74FCT162H952ETPAC support partial power-down operation?
Yes, the 74FCT162H952ETPAC supports partial power-down via its Ioff circuitry. When VCC = 0 V, the outputs are disabled and leakage current is limited to ±1 µA, preventing damaging reverse current flow from powered sections of the system into the unpowered 74FCT162H952ETPAC. This capability is essential for hot-plug architectures and staged power sequencing in programmable logic controllers and test equipment where the 74FCT162H952ETPAC interfaces multiple voltage domains.
What is the maximum clock frequency supported by the 74FCT162H952ETPAC?
The 74FCT162H952ETPAC does not specify a maximum clock frequency directly, but its 6.3 ns maximum propagation delay (tPLH/tPHL) and 3.0 ns minimum clock pulse width (tW) imply reliable operation up to approximately 80 MHz in well-terminated, low-skew clock distribution environments. System-level timing must account for setup/hold times (tSU = 2.5 ns, tH = 1.5 ns) and output skew (<0.5 ns). For sustained 16-bit burst transfers in microprocessor local bus extensions, the 74FCT162H952ETPAC performs robustly at 12–25 MHz with margin.
Is the 74FCT162H952ETPAC RoHS compliant?
Yes, the 74FCT162H952ETPAC is RoHS compliant and classified as "Green (RoHS & no Sb/Br)" per TI's packaging documentation. It contains no lead, bromine, or antimony-based flame retardants above 1000 ppm thresholds and meets EU RoHS Directive 2011/65/EU requirements. The device uses NiPdAu lead finish and is rated MSL Level-1 (260°C peak reflow), making it suitable for lead-free manufacturing processes used in industrial and automotive electronics where the 74FCT162H952ETPAC is deployed.
Can the 74FCT162H952ETPAC be used in place of the CY74FCT162952BTPVC?
The 74FCT162H952ETPAC and CY74FCT162952BTPVC share identical logic functionality, 24 mA drive strength, bus-hold inputs, and industrial temperature rating, but differ in package (TSSOP-56 vs. SSOP-56) and speed grade (6.3 ns vs. 7.5 ns). They are not pin-compatible due to differing pin pitches (0.5 mm vs. 0.635 mm) and body dimensions. Substitution requires PCB redesign. For direct replacement, CY74FCT162H952CTPACT - same TSSOP-56 package and 6.3 ns speed - is the validated functional and mechanical alternative to the 74FCT162H952ETPAC.
74FCT162H952ETPAC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- -
- Qualification:
- -
- Mounting Type:
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- Supplier Device Package:
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74FCT162H952ETPAC FAQ
1.How can I place an order for 74FCT162H952ETPAC through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT162H952ETPAC 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 74FCT162H952ETPAC reliable?
The price and inventory of 74FCT162H952ETPAC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT162H952ETPAC is usually 5 days.
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74FCT162H952ETPAC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT162H952ETPAC 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 74FCT162H952ETPAC?
For technical support, including 74FCT162H952ETPAC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT162H952ETPAC requirements.
6.How does Aetrix verify that 74FCT162H952ETPAC is sourced from the original manufacturer or authorized distributors?
All 74FCT162H952ETPAC 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 74FCT162H952ETPAC meets industry standards.
7.What is the process for return or replacement of 74FCT162H952ETPAC?
All 74FCT162H952ETPAC units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT162H952ETPAC, 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 74FCT162H952ETPAC part is unused and in its original packaging.
Return procedure for 74FCT162H952ETPAC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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