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Texas Instruments CY74FCT827CTSOCT
- Part No.:
- CY74FCT827CTSOCT
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT827CTSOCT.pdf
- Description:
- IC BUF NON-INVERT 5.25V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
CY74FCT827CTSOCT from Texas Instruments is a 10-bit noninverting bus buffer with dual 3-state outputs, designed for high-capacitance-load drive in wide data/address buses and parity paths. It delivers 64-mA sink / 32-mA source output drive, 4.4-ns propagation delay (CL = 50 pF), and operates across –40°C to +85°C. Used in industrial backplane interfaces and legacy TTL-compatible system expansion.
For engineers reviewing the CY74FCT827CTSOCT datasheet, CY74FCT827CTSOCT pinout, CY74FCT827CTSOCT application, or CY74FCT827CTSOCT equivalent, key selection criteria include Ioff-enabled partial-power-down capability, matched rise/fall times for EMI control, edge-rate-controlled outputs, TTL-level compatibility, and SOIC-24 package thermal performance (θJA = 46°C/W).
Technical Context
The CY74FCT827CTSOCT implements dual NAND-gated output enables (OE1, OE2) for flexible 3-state control-both low enable the buffer; either high forces high-impedance. Its FCT-family architecture ensures full TTL input/output voltage compatibility (VIH = 2 V min, VOL = 0.55 V max at 64 mA) while maintaining CMOS-like low input current (±1 µA).
Edge-rate control circuitry limits di/dt to reduce switching noise, and the Ioff feature actively disables outputs during power-down to prevent backflow current when VCC = 0 V. All 10 inputs and outputs exhibit low capacitance (Ci = 5–10 pF, Co = 9–12 pF), minimizing bus loading in active and high-Z states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 10-bit noninverting buffer with dual 3-state enable (NAND logic) |
| Propagation Delay | 4.4 ns max (D→Y, CL = 50 pF, RL = 500 Ω) - supports 100+ MHz bus timing margins |
| Output Drive | 64 mA sink / 32 mA source - drives heavy capacitive loads (e.g., 50-cm PCB traces + multiple TTL inputs) |
| Ioff Support | ±1 µA max at VCC = 0 V - enables safe hot-insertion and partial-power-down in modular systems |
| Supply Voltage | 4.75 V to 5.25 V - tight regulation required; rejects ripple better than wider-range FCT variants |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial handling requirements without external protection |
| Operating Temperature | –40°C to +85°C - qualified for extended-temperature industrial control and telecom line cards |
Pinout & Package
Package: SOIC-24 (DW), body size 15.4 mm × 7.5 mm, standard JEDEC MS-013, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 | Data Inputs (D0–D9) | TTL/CMOS-compatible inputs; low input capacitance (5–10 pF) minimizes driver loading |
| 11 | GND | Ground reference for all I/O and internal logic; requires low-inductance connection to plane |
| 12 | VCC | +5 V supply; decoupling (0.1 µF ceramic + 4.7 µF tantalum) required within 1 cm |
| 13–22 | Data Outputs (Y0–Y9) | 3-state totem-pole outputs; 64-mA sink capability enables driving 10+ TTL loads |
| 23 | OE2 | Active-low output enable (NANDed with OE1); controls all Y outputs simultaneously |
| 24 | OE1 | Active-low output enable (NANDed with OE2); both OE1 and OE2 must be low for transparency |
Key Features
| Feature | Design Value |
|---|---|
| Dual NAND-gated 3-state enables | Enables independent control of output groups or synchronized disable across all 10 bits |
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) by limiting slew rate - critical for dense backplanes |
| Ioff partial-power-down support | Prevents reverse current flow when VCC is off - essential for hot-swap and modular power architectures |
| Matched rise/fall times | Ensures symmetrical signal edges (tPLH ≈ tPHL), minimizing duty-cycle distortion on clock/data buses |
| Fully TTL-compatible I/O levels | Accepts standard TTL VIH (2 V min) and drives VOH ≥ 2.4 V at –32 mA - interoperable with legacy 74LS/AS logic |
Applications
| Industrial Backplane Interface | Legacy System Expansion |
|---|---|
Use Scenario: Buffering address/data lines between CPU module and peripheral slots in DIN-rail-mounted PLC chassis. IC Role / Device Role / Timing Role: Bidirectional bus isolator with 3-state control enabling slot arbitration and hot-plug detection. Use Value: 64-mA sink drive maintains signal integrity across 20-cm parallel bus traces; Ioff prevents backfeed during module insertion/removal. | Use Scenario: Upgrading 74LS244-based memory expansion card in vintage test equipment with higher drive and noise immunity. IC Role / Device Role / Timing Role: Drop-in TTL-compatible buffer replacing obsolete bipolar parts while retaining same pinout and timing margins. Use Value: 4.4-ns propagation delay meets original LS timing specs; edge-rate control eliminates need for added ferrites or RC snubbers. |
| Telecom Line Card Bus Driver | Automated Test Equipment (ATE) Signal Conditioning |
Use Scenario: Driving multiplexed control signals from FPGA to relay banks and analog switches on carrier-grade line cards. IC Role / Device Role / Timing Role: High-current 3-state driver enabling shared bus access among multiple functional blocks. Use Value: Dual OE pins allow hierarchical enable sequencing; matched rise/fall times prevent skew-induced glitches on timing-critical control lines. | Use Scenario: Level-shifting and fanout buffering for pattern generator outputs driving 32-channel DUT interface boards. IC Role / Device Role / Timing Role: Output buffer stage ensuring clean, low-skew transitions into 50-Ω terminated loads. Use Value: Low output capacitance (9–12 pF) preserves fast edge fidelity; 2000-V HBM ESD rating withstands repeated probe contact in lab environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT244NSR | Octal (8-bit), not 10-bit; identical SOIC-20 package; 32-mA sink (vs. 64 mA) | Suitable only where bus width ≤ 8 bits; lower drive limits trace length and fanout | Select when pin count or board space restricts to 8-bit paths and reduced drive suffices. |
| 74AC244SCX | AC-family; 5-V only; no Ioff; 24-mA sink; faster (3.5 ns) but higher noise | Lacks partial-power-down support; unsuitable for hot-swap; requires stricter layout for EMI control | Choose for cost-sensitive, non-hot-swap designs needing marginally faster timing and no power sequencing. |
Compared with SN74FCT244NSR and 74AC244SCX, the CY74FCT827CTSOCT uniquely combines 10-bit width, 64-mA drive, Ioff, and edge-rate control - making it the only option for robust, high-density industrial backplane buffering requiring both capacity and safety.
Availability
CY74FCT827CTSOCT is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system expansion, and telecom line card bus drivers requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for CY74FCT827CTSOCT 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 CY74FCT827CTSOCT belongs to TI's FCT logic family, engineered for high-speed, low-noise, TTL-compatible bus interfacing in mission-critical industrial and telecom infrastructure.
FAQ
What is the maximum operating temperature range for the CY74FCT827CTSOCT?
The CY74FCT827CTSOCT is rated for operation from –40°C to +85°C ambient temperature. This extended industrial temperature range ensures reliable performance in demanding environments such as factory automation controllers, outdoor telecom cabinets, and power supply monitoring modules where thermal cycling and sustained high-temperature operation occur. The SOIC-24 package's θJA of 46°C/W supports this rating under typical PCB copper pour conditions.
Does the CY74FCT827CTSOCT support partial-power-down mode?
Yes, the CY74FCT827CTSOCT fully supports partial-power-down mode via its Ioff circuitry. When VCC = 0 V, the outputs are actively disabled with leakage limited to ±1 µA even if driven to 4.5 V - preventing damaging backflow current. This feature is essential for hot-swap applications like modular PLC I/O carriers and field-replaceable telecom line cards where subsystems power up/down independently.
What is the propagation delay specification for CY74FCT827CTSOCT under standard load conditions?
The CY74FCT827CTSOCT has a maximum propagation delay of 4.4 ns (tPLH/tPHL) when driving a 50-pF load with 500-Ω termination, measured at VCC = 5 V and TA = 25°C. This value is guaranteed across the full operating range (–40°C to +85°C, VCC = 4.75–5.25 V). The tight 4.4-ns spec enables use in high-speed 100-MHz bus systems with sufficient setup/hold margin for synchronous peripherals.
How does the dual-output-enable (OE1/OE2) logic work on the CY74FCT827CTSOCT?
The CY74FCT827CTSOCT uses NAND logic for its dual output enables: both OE1 and OE2 must be low to enable the buffer (Y = D); if either OE1 or OE2 is high, all outputs go to high-impedance (Z). This architecture allows flexible control - e.g., OE1 tied to system reset (active-low), OE2 controlled by FPGA for dynamic bus arbitration. The function table in the TI datasheet (SCCS034A) confirms this behavior with no internal inversion.
Is the CY74FCT827CTSOCT pin-compatible with older 74FCT244 or 74LS244 devices?
No, the CY74FCT827CTSOCT is not pin-compatible with 74FCT244 (octal, SOIC-20) or 74LS244 (octal, DIP-20/SOIC-20). It is a 10-bit device in SOIC-24, with dedicated pins for D0–D9, Y0–Y9, OE1, OE2, VCC, and GND. While functionally similar to those octal buffers, its 24-pin layout, dual-OE structure, and 10-bit width require PCB redesign. However, it is functionally and electrically compatible with the CY74FCT827T family and drop-in replaceable for other 10-bit FCT827 variants in same package.
CY74FCT827CTSOCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 10
- 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
CY74FCT827CTSOCT FAQ
1.How can I place an order for CY74FCT827CTSOCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT827CTSOCT 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 CY74FCT827CTSOCT reliable?
The price and inventory of CY74FCT827CTSOCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT827CTSOCT is usually 5 days.
3.What payment methods are accepted for CY74FCT827CTSOCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT827CTSOCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT827CTSOCT?
CY74FCT827CTSOCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT827CTSOCT 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 CY74FCT827CTSOCT?
For technical support, including CY74FCT827CTSOCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT827CTSOCT requirements.
6.How does Aetrix verify that CY74FCT827CTSOCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT827CTSOCT 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 CY74FCT827CTSOCT meets industry standards.
7.What is the process for return or replacement of CY74FCT827CTSOCT?
All CY74FCT827CTSOCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT827CTSOCT, 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 CY74FCT827CTSOCT part is unused and in its original packaging.
Return procedure for CY74FCT827CTSOCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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