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Texas Instruments CY74FCT652CTSOCE4
- Part No.:
- CY74FCT652CTSOCE4
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT652CTSOCE4.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,093
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Product details
Overview
CY74FCT652CTSOCE4 from Texas Instruments is an 8-bit registered transceiver with 3-state outputs, designed for bidirectional data bus isolation and real-time/stored-data multiplexing in TTL-compatible systems. It features independent A/B registers, 5.4 ns propagation delay (tPLH/tPHL), 64 mA sink / 32 mA source drive strength, and Ioff support for partial-power-down operation. Used in backplane interface logic and memory-mapped I/O control.
For engineers reviewing the CY74FCT652CTSOCE4 datasheet, CY74FCT652CTSOCE4 pinout, CY74FCT652CTSOCE4 application, or CY74FCT652CTSOCE4 equivalent, key selection criteria include registered vs. transparent transfer mode, simultaneous clock edge handling, 3-state enable timing (tPZH/tPZL), and SOIC-24 package compatibility with legacy FCT-family layouts.
Technical Context
This device integrates dual 8-bit D-type flip-flop banks with separate CPAB/CPBA clocks and SAB/SBA select controls, enabling independent storage of A- and B-bus data. Its edge-rate control circuitry reduces switching noise while maintaining matched rise/fall times (typical 3.3 V VOH).
The GAB and GBA enable inputs operate independently to control direction and 3-state output drivers, supporting isolation, real-time pass-through, and stored-data forwarding modes per the function table. Ioff protection activates when VCC = 0 V, limiting reverse current to ±1 µA at 4.5 V on any I/O pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 5.4 ns max (tPLH/tPHL); ensures tight timing margin in 20 MHz synchronous bus interfaces. |
| Output Drive | 64 mA sink / 32 mA source; drives heavy capacitive loads (e.g., 10+ TTL inputs) without external buffers. |
| Voltage Range | 4.75–5.25 V supply; compatible with regulated 5 V rails and tolerant of ±5% variation. |
| Ioff Current | ±1 µA at VCC = 0 V; prevents backflow damage during hot-insertion or partial system power-down. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V; fully interoperable with standard TTL logic levels. |
| Operating Temp | –40°C to +85°C; qualified for industrial temperature range operation. |
| Package | SOIC-24 (DW); 0.300-inch wide body, JEDEC MS-013 compliant footprint. |
Pinout & Package
SOIC-24 (DW) package with 300-mil body width, gull-wing leads, and standard JEDEC MO-001AC outline. Pin 1 marked by beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CPAB) | A-to-B register clock | Low-to-high edge stores A-bus data into B-register; functional regardless of GAB/GBA state. |
| 2 (SAB) | A-to-B select control | High = forward stored A-data to B-bus; low = forward real-time A-data to B-bus. |
| 3 (GAB) | A-to-B output enable | Low = enable A→B path; high = high-impedance A-output drivers. |
| 4–11 (A1–A8) | A-bus data I/O | Bidirectional pins: input when GAB=high, output when GAB=low and SAB selects mode. |
| 12 (GND) | Ground reference | Primary signal return; must be connected before VCC for ESD-safe power sequencing. |
| 13 (VCC) | Power supply | +5 V nominal supply; decoupling capacitor (0.1 µF ceramic) required within 10 mm. |
| 14 (CPBA) | B-to-A register clock | Low-to-high edge stores B-bus data into A-register; independent of GBA/SBA levels. |
| 15 (SBA) | B-to-A select control | High = forward stored B-data to A-bus; low = forward real-time B-data to A-bus. |
| 16 (GBA) | B-to-A output enable | Low = enable B→A path; high = high-impedance B-output drivers. |
| 17–24 (B1–B8) | B-bus data I/O | Bidirectional pins: input when GBA=high, output when GBA=low and SBA selects mode. |
Key Features
| Feature | Design Value |
|---|---|
| Independent A/B register control | Enables asymmetric data capture: e.g., store A-bus at t=0, store B-bus at t=5 ns, then forward both simultaneously. |
| No-glitch select transition | SAB/SBA control logic eliminates decoding spikes during real-time ↔ stored-data mode switching. |
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) in dense PCB layouts without sacrificing speed. |
| TTL-compatible I/O thresholds | Accepts standard TTL VIH/VIL and drives TTL loads directly-no level-shifting required. |
| Multiplexed real-time + stored transfer | Allows one device to serve as both a transparent bus switch and a registered latch in time-multiplexed systems. |
Applications
| Memory-Mapped I/O Interface | Backplane Data Isolation |
|---|---|
|
Use Scenario: Isolating CPU address/data bus from peripheral modules sharing same physical bus lines. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, glitch-free handshaking between master and slave devices across long traces. Use Value: Eliminates bus contention during read/write cycles using independent GAB/GBA enables and CPAB/CPBA clocks. |
Use Scenario: Interfacing multiple processor cards to a shared backplane without signal integrity degradation. IC Role / Device Role / Timing Role: Bidirectional bus repeater with edge-rate control, reducing crosstalk and ground bounce in multi-drop configurations. Use Value: 64 mA sink capability maintains signal integrity over 15 cm FR4 traces loaded with 8+ receivers. |
| Industrial PLC I/O Expansion | Digital Signal Processor (DSP) Memory Bridge |
|
Use Scenario: Adding isolated digital I/O channels to programmable logic controllers operating in electrically noisy environments. IC Role / Device Role / Timing Role: Level-translating and noise-suppressing interface between microcontroller GPIO and field-side optocoupled inputs/outputs. Use Value: Ioff support allows safe hot-swap of I/O modules while main controller remains powered. |
Use Scenario: Connecting external SRAM or FIFO to a DSP with mismatched access timing requirements. IC Role / Device Role / Timing Role: Registered buffer synchronizing asynchronous memory reads/writes to DSP clock domain. Use Value: 5.4 ns propagation delay enables reliable 20 MHz memory access without additional wait states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT652ATSOCT | 6.3 ns max propagation delay; identical pinout and logic function. | Suitable where timing budget allows 0.9 ns relaxation; lower power consumption at same frequency. | Select when system clock rate ≤ 16 MHz and thermal constraints favor reduced dynamic current. |
| SN74FCT652NSR | Same 5.4 ns speed grade but SSOP-24 (DBQ) package; RoHS-compliant NIPDAU finish. | Preferred for space-constrained PCBs requiring 0.208-inch body width instead of SOIC's 0.300-inch. | Choose for new designs targeting higher board density or automated optical inspection compatibility. |
Compared with CY74FCT652CTSOCE4, the CY74FCT652ATSOCT trades 0.9 ns speed for lower ICCD (0.06 mA/MHz vs. 0.12 mA/MHz), while SN74FCT652NSR retains identical timing but shifts to SSOP-24 for layout flexibility-neither is pin-compatible with SOIC-24 without footprint redesign.
Availability
CY74FCT652CTSOCE4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, memory-mapped microcontroller interfaces, and backplane data isolation requiring stable component supply across extended product lifecycles.
Supply support for CY74FCT652CTSOCE4 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 over 50 years of innovation in industrial and automotive electronics.
The CY74FCT652C series belongs to TI's Fast CMOS Technology (FCT) logic family, engineered for high-speed, low-noise bidirectional bus interfacing in industrial control and communications infrastructure.
FAQ
What is the maximum clock frequency supported by CY74FCT652CTSOCE4?
CY74FCT652CTSOCE4 does not specify a maximum clock frequency in its datasheet because it is an edge-triggered register-not a free-running sequential device. Its timing is governed by minimum pulse width (tw ≥ 5 ns) and setup/hold times (tsu = 2 ns, th = 1.5 ns). When used with 5.4 ns propagation delay, it reliably supports 20 MHz synchronous bus transfers with proper timing margins.
Does CY74FCT652CTSOCE4 support hot-swap or partial-power-down operation?
Yes, CY74FCT652CTSOCE4 includes Ioff circuitry that disables all outputs when VCC = 0 V, limiting reverse current to ±1 µA per I/O pin at up to 4.5 V. This protects downstream circuitry during live insertion or removal in modular systems, meeting industrial hot-swap safety requirements without external protection components.
Can CY74FCT652CTSOCE4 operate with mixed 3.3 V and 5 V logic levels?
No-CY74FCT652CTSOCE4 is strictly a 5 V device with VCC range 4.75–5.25 V and TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V). It cannot accept 3.3 V logic highs as valid inputs nor safely drive 3.3 V-tolerant inputs without level-shifting, as its VOH min is 2.0 V at –32 mA but typical is 3.3 V, exceeding 3.3 V I/O absolute maximum ratings.
How does the select-control logic prevent glitches during mode transitions in CY74FCT652CTSOCE4?
CY74FCT652CTSOCE4 uses dedicated internal decode logic for SAB and SBA inputs that avoids combinatorial hazards during real-time ↔ stored-data switching. Unlike basic multiplexers, this architecture ensures no transient invalid output state occurs-even during asynchronous SAB/SBA changes-by gating clock paths and output enables in sequence rather than relying on static logic alone.
Is CY74FCT652CTSOCE4 pin-compatible with earlier CY74FCT652T variants?
Yes-CY74FCT652CTSOCE4 shares identical SOIC-24 (DW) pinout, electrical characteristics, and logic function with CY74FCT652T and CY74FCT652AT in the same package. The "C" speed grade (5.4 ns) supersedes the original "T" (9 ns) and "A" (6.3 ns) versions while maintaining full backward compatibility in existing PCB layouts and firmware.
CY74FCT652CTSOCE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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
CY74FCT652CTSOCE4 FAQ
1.How can I place an order for CY74FCT652CTSOCE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT652CTSOCE4 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 CY74FCT652CTSOCE4 reliable?
The price and inventory of CY74FCT652CTSOCE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT652CTSOCE4 is usually 5 days.
3.What payment methods are accepted for CY74FCT652CTSOCE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT652CTSOCE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT652CTSOCE4?
CY74FCT652CTSOCE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT652CTSOCE4 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 CY74FCT652CTSOCE4?
For technical support, including CY74FCT652CTSOCE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT652CTSOCE4 requirements.
6.How does Aetrix verify that CY74FCT652CTSOCE4 is sourced from the original manufacturer or authorized distributors?
All CY74FCT652CTSOCE4 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 CY74FCT652CTSOCE4 meets industry standards.
7.What is the process for return or replacement of CY74FCT652CTSOCE4?
All CY74FCT652CTSOCE4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT652CTSOCE4, 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 CY74FCT652CTSOCE4 part is unused and in its original packaging.
Return procedure for CY74FCT652CTSOCE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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