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Texas Instruments CY29FCT52CTSOC
- Part No.:
- CY29FCT52CTSOC
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY29FCT52CTSOC.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,453
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Product details
Overview
CY29FCT52CTSOC from Texas Instruments is an 8-bit registered bidirectional transceiver with dual independent clocked registers, 64-mA sink/32-mA source drive strength, 6.3-ns propagation delay, and Ioff-enabled partial-power-down support. It interfaces between two TTL-compatible buses in high-noise industrial backplanes and memory expansion subsystems.
For engineers reviewing the CY29FCT52CTSOC datasheet, CY29FCT52CTSOC pinout, CY29FCT52CTSOC application, or CY29FCT52CTSOC equivalent, key selection criteria include bidirectional register timing control, SOIC-24 package compatibility, 5-V operation with TTL-level I/O, and ESD robustness per JESD22.
Technical Context
The CY29FCT52CTSOC implements two independent 8-bit edge-triggered D-type registers-one for A→B data flow (clocked by CPA/CEA), one for B→A flow (clocked by CPB/CEB)-with separate 3-state output enables (OEA/OEB) per direction. Each register supports hold, load, and high-impedance states via synchronous enable logic.
Its edge-rate control circuitry reduces simultaneous switching noise, while matched rise/fall times and 50-pF load-driven 6.3-ns tPLH/tPHL ensure signal integrity in dense PCB layouts. Ioff protection activates when VCC = 0 V, limiting reverse current to ±1 µA at 4.5 V on I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures stable operation across industrial 5-V rail tolerances |
| Propagation Delay | 6.3 ns max (CP→A/B) - enables reliable timing in 16-MHz bus systems |
| Output Drive | 64 mA sink / 32 mA source - drives heavy capacitive loads and multiple TTL inputs |
| ESD Rating | 2000-V HBM, 200-V MM, 1000-V CDM - meets stringent board-level ESD immunity requirements |
| Ioff Current | ±1 µA at VCC = 0 V - prevents backflow damage during hot-insertion or staged power sequencing |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial ambient conditions |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - fully compatible with standard TTL logic families |
Pinout & Package
Package: SOIC-24 (DW), body size 15.4 mm × 7.5 mm, 1.27-mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A7 | A-side data inputs / B-side outputs | Connect to local bus A; driven by B register when OEA = L |
| B0–B7 | B-side data inputs / A-side outputs | Connect to remote bus B; driven by A register when OEB = L |
| CPA | A-register clock input | Triggers A→B data capture on rising edge when CEA = L |
| CPB | B-register clock input | Triggers B→A data capture on rising edge when CEB = L |
| CEA | A-register clock enable | Hold A register contents when high; no effect on OEA or output state |
| CEB | B-register clock enable | Hold B register contents when high; no effect on OEB or output state |
| OEA | A-output enable | Drives A0–A7 onto B bus when low; places outputs in high-Z when high |
| OEB | B-output enable | Drives B0–B7 onto A bus when low; places outputs in high-Z when high |
| VCC | Power supply | 5-V nominal supply; decoupling required within 10 mm of pin |
| GND | Ground reference | Dedicated ground pin; must be connected to low-impedance plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent register control | Separate CPA/CEA/OEA and CPB/CEB/OEB allows asynchronous bidirectional data flow without bus contention |
| Edge-rate controlled outputs | Reduced dV/dt minimizes crosstalk and ground bounce in multi-drop bus environments |
| TTL-compatible I/O levels | Accepts and drives standard TTL thresholds (VIL = 0.8 V, VIH = 2.0 V) without level-shifting circuitry |
| Matched rise/fall times | Ensures symmetrical waveform edges for clean setup/hold timing margins on both data and control lines |
| Partial-power-down support | Ioff limits reverse current during VCC ramp-down, enabling safe hot-swap in modular backplane systems |
Applications
| Industrial Backplane Interface | Memory Expansion Subsystem |
|---|---|
|
Use Scenario: Bidirectional data transfer between CPU module and peripheral carrier card in a 19-inch rack-mounted PLC chassis. IC Role / Device Role / Timing Role: Registered transceiver synchronizing data across isolation boundaries with independent clock domains. Use Value: 6.3-ns propagation delay and 64-mA drive maintain signal integrity over 15-cm backplane traces at 16 MHz. |
Use Scenario: Extending 8-bit data bus from microcontroller to external SRAM or EPROM in space-constrained embedded controller. IC Role / Device Role / Timing Role: Direction-controlled buffer isolating memory address/data paths during read/write cycles. Use Value: Separate OEA/OEB enables precise timing control-A outputs enabled only during write, B outputs only during read. |
| Hot-Swappable I/O Module | TTL-to-TTL Bus Isolation |
|
Use Scenario: Supporting live insertion/removal of digital I/O cards in programmable automation controllers. IC Role / Device Role / Timing Role: Ioff-protected interface preventing backfeed into powered-down modules. Use Value: ±1 µA Ioff at 4.5 V ensures no latch-up or supply rail perturbation during hot-swap transitions. |
Use Scenario: Electrically isolating two TTL bus segments sharing common ground but requiring independent timing control. IC Role / Device Role / Timing Role: Registered repeater eliminating capacitive loading and skew between bus sections. Use Value: Dual-clock architecture allows CPA/CPB to be driven from separate controllers, enabling asynchronous domain bridging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT520CTSO | Same SOIC-24 package, identical pinout, but lacks Ioff and has higher 80-mA sink drive | Not suitable for partial-power-down systems; better for legacy FCT-only designs with heavier loads | Select only if Ioff is unnecessary and higher sink current is required |
| 74ACT520SCX | ACT-family device; 5-V CMOS input thresholds (VIH = 3.5 V), 10-ns typical delay, no Ioff | Requires level translation when interfacing with TTL sources; unsuitable for hot-swap scenarios | Choose only for pure CMOS system integration where TTL compatibility is not needed |
Compared with SN74FCT520CTSO and 74ACT520SCX, the CY29FCT52CTSOC uniquely combines TTL-level compatibility, Ioff protection, and sub-7-ns timing-making it the only option qualified for industrial hot-swap and mixed-logic backplane designs without redesign.
Availability
CY29FCT52CTSOC is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion subsystems, and hot-swappable I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY29FCT52CTSOC 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 heritage in industrial-grade logic families.
The CY29FCT series was designed specifically for high-reliability 5-V TTL-compatible systems requiring registered data flow, noise resilience, and partial-power-down capability in harsh environments.
FAQ
What is the maximum clock frequency supported by CY29FCT52CTSOC?
The CY29FCT52CTSOC does not specify a maximum clock frequency in its datasheet; instead, it guarantees timing performance down to a minimum pulse width of 3 ns for CPA and CPB. This corresponds to a theoretical maximum toggle rate of approximately 167 MHz under ideal conditions, though practical bus system design typically limits operation to ≤16 MHz due to trace propagation delays and setup/hold margin requirements for the CY29FCT52CTSOC.
Does CY29FCT52CTSOC support hot-plug operation?
Yes, the CY29FCT52CTSOC supports hot-plug operation through its Ioff circuitry, which disables all outputs and limits reverse current to ±1 µA when VCC = 0 V. This feature prevents damaging backflow into powered-down circuitry, making the CY29FCT52CTSOC suitable for modular backplane systems where cards may be inserted or removed while the main chassis remains energized.
Is CY29FCT52CTSOC pin-compatible with standard 74FCT520 devices?
Yes, the CY29FCT52CTSOC is functionally and pin-compatible with the 74FCT520 family, including SN74FCT520CTSO. Its pinout matches the industry-standard 24-pin SOIC layout for 8-bit registered transceivers, with identical A/B data, clock, enable, and power pin assignments-enabling drop-in replacement in existing FCT-based designs without PCB modification.
What is the purpose of the edge-rate control circuitry in CY29FCT52CTSOC?
The edge-rate control circuitry in the CY29FCT52CTSOC intentionally limits the slew rate of output voltage transitions to reduce simultaneous switching noise (SSN) and electromagnetic interference (EMI). This design feature improves signal integrity in dense PCB layouts and multi-drop bus configurations, directly contributing to the CY29FCT52CTSOC's ability to maintain timing margins in electrically noisy industrial environments.
Can CY29FCT52CTSOC operate with 3.3-V logic inputs?
No, the CY29FCT52CTSOC is a 5-V-only device with TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V); it is not guaranteed to recognize 3.3-V logic-high signals reliably. Applying 3.3-V inputs risks marginal or non-functional behavior. For mixed-voltage systems, level translation or a 3.3-V–compatible alternative such as the CY74FCT520T is required alongside the CY29FCT52CTSOC.
CY29FCT52CTSOC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 29FCT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
CY29FCT52CTSOC FAQ
1.How can I place an order for CY29FCT52CTSOC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY29FCT52CTSOC 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 CY29FCT52CTSOC reliable?
The price and inventory of CY29FCT52CTSOC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY29FCT52CTSOC is usually 5 days.
3.What payment methods are accepted for CY29FCT52CTSOC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY29FCT52CTSOC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY29FCT52CTSOC?
CY29FCT52CTSOC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY29FCT52CTSOC 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 CY29FCT52CTSOC?
For technical support, including CY29FCT52CTSOC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY29FCT52CTSOC requirements.
6.How does Aetrix verify that CY29FCT52CTSOC is sourced from the original manufacturer or authorized distributors?
All CY29FCT52CTSOC 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 CY29FCT52CTSOC meets industry standards.
7.What is the process for return or replacement of CY29FCT52CTSOC?
All CY29FCT52CTSOC units undergo pre-shipment inspection (PSI). If there is an issue with CY29FCT52CTSOC, 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 CY29FCT52CTSOC part is unused and in its original packaging.
Return procedure for CY29FCT52CTSOC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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