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Texas Instruments CY29FCT52CTSOCT
- Part No.:
- CY29FCT52CTSOCT
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY29FCT52CTSOCT.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,112
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Product details
Overview
CY29FCT52CTSOCT from Texas Instruments is an 8-bit registered transceiver with dual back-to-back registers, supporting bidirectional data flow between two buses. It features separate clock (CPA/CPB), clock enable (CEA/CEB), and 3-state output-enable (OEA/OEB) controls per register, 64-mA sink / 32-mA source drive strength, Ioff partial-power-down support, and 6.3-ns propagation delay at 5 V.
For engineers reviewing the CY29FCT52CTSOCT datasheet, CY29FCT52CTSOCT pinout, CY29FCT52CTSOCT application, or CY29FCT52CTSOCT equivalent, key selection considerations include TTL-compatible logic levels, edge-rate-controlled noise performance, SOIC-24 package thermal characteristics (46°C/W JA), and Ioff-enabled system-level power sequencing in mixed-voltage bus interfaces.
Technical Context
This device implements two independent 8-bit edge-triggered D-type registers - one for A→B direction, one for B→A - each with asynchronous 3-state output control. Clock inputs (CPA/CPB) are low-to-high edge sensitive; clock enables (CEA/CEB) and output enables (OEA/OEB) are active-low level-sensitive signals.
It operates across –40°C to +85°C with 4.75–5.25-V supply, supports TTL input thresholds (VIL = 0.8 V, VIH = 2.0 V), delivers VOH ≥ 2.4 V at –15 mA, VOL ≤ 0.55 V at 64 mA, and integrates ESD protection exceeding JESD22-A114-A (2000-V HBM), A115-A (200-V MM), and C101 (1000-V CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit bidirectional registered transceiver with dual independent clock domains |
| Propagation Delay | 6.3 ns max (tPLH/tPHL), enabling synchronous bus interfacing up to ~160 MHz clock rate |
| Drive Strength | 64 mA sink / 32 mA source per output, sufficient to drive multiple TTL loads or stubbed transmission lines |
| Ioff Support | Enables safe partial-power-down operation; outputs disable at VCC = 0 V, blocking backflow current |
| ESD Rating | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds industrial handling requirements without external protection |
| Supply Range | 4.75 V to 5.25 V - tightly regulated 5-V operation compatible with legacy TTL and FCT systems |
| Package | SOIC-24 (DW), 7.5-mm width, JEDEC MS-013 compliant, 46°C/W θJA for thermal-aware PCB layout |
Pinout & Package
Package: SOIC-24 (DW), surface-mount, 7.5 mm × 15.4 mm body, 1.27 mm pitch, RoHS-compliant NIPDAU lead finish, MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A7 | A-side register inputs / B-side register outputs | Bidirectional data path: driven by A register when OEA = L; drive B bus when enabled |
| B0–B7 | B-side register inputs / A-side register outputs | Bidirectional data path: driven by B register when OEB = L; drive A bus when enabled |
| CPA | Active-high clock for A register | Loads A-input data on low-to-high transition only when CEA = L |
| CPB | Active-high clock for B register | Loads B-input data on low-to-high transition only when CEB = L |
| CEA | Active-low clock enable for A register | Holds A register contents when high; enables CPA sampling when low |
| CEB | Active-low clock enable for B register | Holds B register contents when high; enables CPB sampling when low |
| OEA | Active-low output enable for A register outputs | Places A0–A7 in high-Z when high; connects A register to B bus when low |
| OEB | Active-low output enable for B register outputs | Places B0–B7 in high-Z when high; connects B register to A bus when low |
| VCC | Positive supply | 5-V nominal supply; must be decoupled locally due to dynamic current demands |
| GND | Ground reference | Common return for all I/O and internal logic; requires low-inductance connection |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate control circuitry | Reduces simultaneous switching noise (SSN) and improves signal integrity on shared bus traces |
| Matched rise/fall times | Minimizes duty-cycle distortion in clock-forwarding or timing-critical data paths |
| TTL-compatible I/O levels | Direct interface with legacy 74F/74AS/74ALS logic without level-shifting components |
| 64-mA sink capability per pin | Drives up to 10 standard TTL loads or terminates unterminated stubs in backplane applications |
| Ioff protection | Prevents destructive current flow during hot-insertion or asymmetric power-up sequences |
Applications
| Bus Interface Bridge | Backplane Data Transceiver |
|---|---|
Use Scenario: Isolating and synchronizing data transfer between two independently clocked 8-bit subsystems (e.g., CPU local bus ↔ peripheral expansion bus). IC Role / Device Role / Timing Role: Registered transceiver providing setup/hold margin via edge-triggered latching and independent clock enables. Use Value: Eliminates metastability risk in asynchronous domain crossings while maintaining full 8-bit bandwidth and TTL compatibility. |
Use Scenario: Driving and receiving parallel data across a long backplane trace with controlled impedance and noise sensitivity. IC Role / Device Role / Timing Role: Bidirectional bus driver with edge-rate control and matched timing to minimize skew and reflections. Use Value: Enables reliable 6.3-ns propagation-limited operation over 15-cm FR-4 traces without external termination or slew-rate limiting. |
| Hot-Swappable Module Interface | Legacy System Bus Extender |
Use Scenario: Supporting safe insertion/removal of daughter cards in powered chassis where VCC may be sequenced independently. IC Role / Device Role / Timing Role: Ioff-enabled transceiver preventing backfeed from live backplane into unpowered module logic. Use Value: Meets IEC 61000-4-2 Level 4 ESD immunity and eliminates need for external isolation switches or diodes. |
Use Scenario: Extending address/data bus length in industrial PLC or test equipment using older 5-V TTL logic families. IC Role / Device Role / Timing Role: Pin-compatible upgrade to AM2952/FCT52 with improved noise immunity and tighter timing specs. Use Value: Maintains full backward compatibility while reducing board-level filtering and improving timing margin by >1.5 ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F521N | Non-registered octal transceiver; no clock or register functionality; TTL-only, no Ioff | Lacks synchronization; unsuitable for asynchronous domain bridging or power sequencing | Select only for static, single-domain bus buffering where clocking is handled externally |
| 74ACT521SCX | Advanced CMOS version; 4.5–5.5-V range; 24-mA drive; no Ioff; higher input capacitance (10 pF) | Lower noise margin vs. TTL; incompatible with legacy 0.8-V/2.0-V thresholds; no partial-power-down support | Prefer for new 5-V AC designs requiring lower ICC but avoid in mixed-logic or hot-swap systems |
Compared with SN74F521N and 74ACT521SCX, CY29FCT52CTSOCT uniquely combines registered synchronization, Ioff safety, TTL-compatible thresholds, and edge-rate control - making it the only option among the three suitable for robust, mixed-power-state bus bridging in industrial control and telecom backplanes.
Availability
CY29FCT52CTSOCT is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system upgrades, and hot-swappable module designs requiring stable component supply, long-term lifecycle continuity, and guaranteed SOIC-24 packaging consistency.
Supply support for CY29FCT52CTSOCT 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
CY29FCT52CTSOCT belongs to TI's FCT-family of 5-V advanced CMOS logic devices, engineered specifically for high-noise-margin, high-drive, registered bus interfacing in mission-critical industrial and telecom infrastructure.
FAQ
What is the maximum clock frequency supported by CY29FCT52CTSOCT?
CY29FCT52CTSOCT does not specify a maximum clock frequency in its datasheet; instead, it guarantees 6.3 ns maximum propagation delay (tPLH/tPHL) and 3 ns minimum pulse width (tw). Based on these timing parameters, reliable operation is achievable up to approximately 160 MHz in well-terminated, low-skew layouts - though actual system frequency depends on board-level setup/hold margins and load capacitance.
Does CY29FCT52CTSOCT support mixed-voltage operation between 3.3 V and 5 V domains?
CY29FCT52CTSOCT is a 5-V-only device with VCC specified from 4.75 V to 5.25 V and TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V). It does not support 3.3-V I/O directly. To interface with 3.3-V systems, external level-shifting or series resistors are required - the device itself lacks dual-supply or voltage-tolerant I/O architecture.
How does the Ioff feature function in CY29FCT52CTSOCT during partial power-down?
In CY29FCT52CTSOCT, the Ioff circuitry activates when VCC = 0 V, disabling all outputs and limiting leakage to ±1 µA even with up to 4.5 V applied at I/O pins. This prevents damaging reverse current flow from live buses into unpowered sections - a critical requirement for hot-swap architectures and phased power sequencing in modular systems.
Can CY29FCT52CTSOCT replace AM2952 in existing designs?
Yes - CY29FCT52CTSOCT is explicitly documented as function, pinout, and drive compatible with AM2952. It offers identical SOIC-24 pin mapping, same 8-bit registered transceiver functionality, and enhanced features including Ioff, edge-rate control, and improved ESD ratings. No PCB changes are required for drop-in replacement.
What is the thermal resistance (θJA) of CY29FCT52CTSOCT in its SOIC package?
The SOIC-24 (DW) package of CY29FCT52CTSOCT has a specified junction-to-ambient thermal resistance (θJA) of 46°C/W under standard JEDEC test conditions (1-layer 1-in² copper pad). This value assumes proper PCB layout with adequate copper pour and thermal vias; actual board-level θJA will vary based on layout density and airflow.
CY29FCT52CTSOCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 29FCT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
CY29FCT52CTSOCT FAQ
1.How can I place an order for CY29FCT52CTSOCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY29FCT52CTSOCT 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 CY29FCT52CTSOCT reliable?
The price and inventory of CY29FCT52CTSOCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY29FCT52CTSOCT is usually 5 days.
3.What payment methods are accepted for CY29FCT52CTSOCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY29FCT52CTSOCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY29FCT52CTSOCT?
CY29FCT52CTSOCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY29FCT52CTSOCT 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 CY29FCT52CTSOCT?
For technical support, including CY29FCT52CTSOCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY29FCT52CTSOCT requirements.
6.How does Aetrix verify that CY29FCT52CTSOCT is sourced from the original manufacturer or authorized distributors?
All CY29FCT52CTSOCT 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 CY29FCT52CTSOCT meets industry standards.
7.What is the process for return or replacement of CY29FCT52CTSOCT?
All CY29FCT52CTSOCT units undergo pre-shipment inspection (PSI). If there is an issue with CY29FCT52CTSOCT, 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 CY29FCT52CTSOCT part is unused and in its original packaging.
Return procedure for CY29FCT52CTSOCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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