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Texas Instruments CY74FCT652ATSOC
- Part No.:
- CY74FCT652ATSOC
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT652ATSOC.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:924
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Product details
Overview
CY74FCT652ATSOC from Texas Instruments is an 8-bit registered transceiver with 3-state outputs, designed for bidirectional bus interfacing in TTL/CMOS mixed-signal systems. It features independent A/B registers, real-time/stored data multiplexing, 64-mA sink / 32-mA source drive, and Ioff partial-power-down support. Used in backplane data routing and memory interface buffering.
For engineers reviewing the CY74FCT652ATSOC datasheet, CY74FCT652ATSOC pinout, CY74FCT652ATSOC application, or CY74FCT652ATSOC equivalent, key selection criteria include propagation delay (6.3 ns max), 5-V operation, SOIC-24 package compatibility, and edge-rate controlled noise performance.
Technical Context
This device integrates dual 8-bit D-type flip-flops with bus transceiver logic and select-control circuitry to eliminate decoding glitches during real-time ↔ stored-data mode transitions. Each bus (A and B) has dedicated clock (CPAB/CPBA), select (SAB/SBA), and enable (GAB/GBA) inputs.
It supports simultaneous real-time transfer and register storage via independent control paths, with matched rise/fall times and TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V). The Ioff feature disables outputs at VCC = 0 V, preventing backflow current during partial power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 6.3 ns max (tPLH/tPHL); ensures tight timing margins in 5-V synchronous bus systems. |
| Supply Voltage | 4.75–5.25 V; operates reliably across industrial-grade 5-V rail tolerances. |
| Output Drive | 64 mA sink / 32 mA source; drives heavy capacitive loads and multiple TTL inputs. |
| Ioff Support | Active at VCC = 0 V; enables safe hot-insertion and partial power-down without bus contention. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V; fully compatible with standard TTL logic levels. |
| Edge-Rate Control | Integrated circuitry reduces switching noise; improves signal integrity on shared PCB traces. |
| Operating Temp | –40°C to +85°C; qualified for industrial temperature environments. |
Pinout & Package
Package: SOIC-24 (DW), 7.5 mm × 15.4 mm body, 1.27 mm pitch, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 A1–A8 | A-bus data inputs/outputs | Bi-directional TTL-compatible I/O pins for A-side bus connection. |
| 9, 10, 11, 12, 13, 14, 15, 16 B1–B8 | B-bus data inputs/outputs | Bi-directional TTL-compatible I/O pins for B-side bus connection. |
| 17, 18 GAB, GBA | Output enable controls | Active-low enables for A→B and B→A 3-state output drivers. |
| 19, 20 SAB, SBA | Select controls | High selects stored-data transfer; low selects real-time transfer between buses. |
| 21, 22 CPAB, CPBA | Register clocks | Low-to-high transitions latch data into A or B register independently. |
| 23 GND | Ground reference | Primary ground return for all logic and I/O circuits. |
| 24 VCC | Power supply | +5 V supply for internal logic, registers, and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Independent A/B Registers | Enables concurrent storage of data on both buses without cross-interference or timing dependency. |
| Glitch-Free Select Control | Eliminates transient bus contention during real-time ↔ stored-data mode transitions via dedicated logic. |
| Matched Rise/Fall Times | Reduces EMI and overshoot by balancing edge symmetry under load. |
| TTL-Compatible Interface | Accepts standard TTL input voltages and drives TTL loads directly-no level-shifting required. |
| Reduced VOH (Typ. 3.3 V) | Lowers switching noise and improves noise margin vs. legacy FCT devices while maintaining 5-V compatibility. |
Applications
| Backplane Data Routing | Memory Interface Buffering |
|---|---|
Use Scenario: Bidirectional data exchange between CPU and peripheral modules across a shared 8-bit backplane. IC Role / Device Role / Timing Role: Registered transceiver managing real-time command forwarding and stored status response buffering. Use Value: Eliminates bus contention during mode switches and sustains 6.3 ns timing compliance across 20+ inch PCB traces. | Use Scenario: Isolating and synchronizing data flow between microcontroller and parallel SRAM/ROM. IC Role / Device Role / Timing Role: Clock-controlled register holding address/data during memory access cycles with 3-state isolation. Use Value: Prevents read-modify-write corruption during bus arbitration and supports 5-V TTL-level memory timing windows. |
| Industrial PLC I/O Expansion | Digital Signal Processor Interface |
Use Scenario: Extending GPIO count between main controller and distributed I/O modules in noisy factory environments. IC Role / Device Role / Timing Role: Noise-immune bus transceiver with edge-rate control and Ioff for safe hot-swap module insertion. Use Value: Maintains signal integrity despite EMI from motors/relays and enables maintenance without full system shutdown. | Use Scenario: Interfacing fixed-function DSP peripherals (e.g., codec, ADC buffer) requiring synchronized data handshaking. IC Role / Device Role / Timing Role: Registered data path providing setup/hold time margin for asynchronous peripheral clocks. Use Value: Absorbs clock domain skew and enables deterministic data capture at up to 158 MHz effective bus rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT652CTSOC | 5.4 ns max propagation delay; higher speed grade with identical pinout and function. | Required where tighter timing budgets exist (e.g., high-speed memory controllers). | Select when system clock period < 12 ns and real-time latency must be minimized. |
| SN74FCT652ATSJ | Same speed grade (6.3 ns), but in SSOP-24 (DBQ) package; identical electrical specs. | Preferred for space-constrained layouts where SOIC footprint is insufficient. | Choose for denser PCB designs needing same timing and drive strength in smaller area. |
Compared with CY74FCT652CTSOC and SN74FCT652ATSJ, the CY74FCT652ATSOC offers optimal balance of industrial temperature range, SOIC-24 manufacturability, and proven noise immunity-making it ideal for cost-sensitive, high-reliability embedded bus interfaces.
Availability
CY74FCT652ATSOC is available at Aetrix Electronics and suitable for industrial control systems, memory subsystems, and backplane interconnects requiring stable component supply and long-term lifecycle support.
Supply support for CY74FCT652ATSOC 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 for industrial, automotive, and communications markets.
The CY74FCT652ATSOC belongs to TI's FCT logic family, engineered for robust 5-V TTL/CMOS interoperability, low-noise bus management, and industrial reliability in mission-critical digital systems.
FAQ
What is the maximum propagation delay specification for CY74FCT652ATSOC?
The CY74FCT652ATSOC has a maximum propagation delay of 6.3 ns (tPLH/tPHL) over the full operating temperature range (–40°C to +85°C) at VCC = 4.75–5.25 V. This value applies to both A→B and B→A data paths under standard 50-pF load conditions and defines the worst-case timing budget for synchronous bus design.
Does CY74FCT652ATSOC support partial power-down operation?
Yes, CY74FCT652ATSOC includes Ioff circuitry that actively disables all outputs when VCC = 0 V, preventing damaging current backflow during partial power-down or hot-swap events. This feature is fully specified per TI's recommended operating conditions and verified across –65°C to +150°C storage temperature.
What package type and footprint does CY74FCT652ATSOC use?
CY74FCT652ATSOC uses a 24-pin SOIC (DW) package with 1.27 mm pitch, 7.5 mm × 15.4 mm body dimensions, and RoHS-compliant NIPDAU finish. Its pinout matches industry-standard SOIC-24 footprints and is compatible with automated pick-and-place and reflow processes.
How does the select-control logic prevent glitches in CY74FCT652ATSOC?
The CY74FCT652ATSOC implements dedicated select-control circuitry that decouples SAB/SBA evaluation from clock edges, eliminating the decoding glitches common in multiplexed transceivers. A low SAB/SBA selects real-time transfer; high selects stored-data transfer-both transitions occur cleanly without bus contention or metastability.
Can CY74FCT652ATSOC drive standard TTL loads directly?
Yes, CY74FCT652ATSOC is fully compatible with TTL input and output logic levels: VIH = 2.0 V min, VIL = 0.8 V max, VOH ≥ 2.4 V at –15 mA, VOL ≤ 0.55 V at 64 mA. Its 64-mA sink capability allows direct driving of up to 10 standard TTL inputs without external buffers.
CY74FCT652ATSOC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- 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
CY74FCT652ATSOC FAQ
1.How can I place an order for CY74FCT652ATSOC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT652ATSOC 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 CY74FCT652ATSOC reliable?
The price and inventory of CY74FCT652ATSOC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT652ATSOC is usually 5 days.
3.What payment methods are accepted for CY74FCT652ATSOC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT652ATSOC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT652ATSOC?
CY74FCT652ATSOC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT652ATSOC 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 CY74FCT652ATSOC?
For technical support, including CY74FCT652ATSOC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT652ATSOC requirements.
6.How does Aetrix verify that CY74FCT652ATSOC is sourced from the original manufacturer or authorized distributors?
All CY74FCT652ATSOC 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 CY74FCT652ATSOC meets industry standards.
7.What is the process for return or replacement of CY74FCT652ATSOC?
All CY74FCT652ATSOC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT652ATSOC, 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 CY74FCT652ATSOC part is unused and in its original packaging.
Return procedure for CY74FCT652ATSOC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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