My Inquiry
My Account
Texas Instruments CY74FCT244ATSOCT
- Part No.:
- CY74FCT244ATSOCT
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT244ATSOCT.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,864
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY74FCT244ATSOCT from Texas Instruments is an octal 3-state buffer/line driver IC used for memory address driving, clock distribution, and bus transceiver applications in industrial and embedded systems. It features 64-mA sink / 32-mA source output drive, 4.6 ns max propagation delay, Ioff partial-power-down support, TTL-compatible input/output levels, and SOIC-20 package.
For engineers reviewing the CY74FCT244ATSOCT datasheet, CY74FCT244ATSOCT pinout, CY74FCT244ATSOCT application, or CY74FCT244ATSOCT equivalent, key selection criteria include 3-state bus isolation capability, -40°C to 85°C industrial temperature range, 5-V supply compatibility, and SOIC-20 footprint suitability for high-density PCB layouts.
Technical Context
This device implements dual 4-bit noninverting buffers with independent 3-state enable controls (OEA and OEB), enabling selective activation of two 4-bit data paths. Each output supports high-impedance state when its respective enable is deasserted, allowing bidirectional bus sharing without external logic.
It uses FCT logic technology with edge-rate control circuitry to reduce switching noise, matched rise/fall times (tPLH/tPHL ≤ 4.6 ns), and Ioff protection that disables outputs during power-down to prevent backflow current-critical for hot-swap and multi-rail system designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - Ensures stable operation across standard 5-V rail tolerances in industrial environments. |
| Propagation Delay | Max 4.6 ns (tPLH/tPHL) - Enables reliable timing in high-speed address/data buses up to ~217 MHz system clock domains. |
| Output Drive | 64 mA sink / 32 mA source - Sufficient to drive multiple TTL loads or long traces without external buffering. |
| Ioff Current | ±1 µA at VCC = 0 V - Prevents damaging back-current flow during partial power-down sequences. |
| Operating Temp | -40°C to +85°C - Qualified for industrial-grade reliability in extended ambient conditions. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - Fully compatible with TTL, NMOS, and CMOS logic families without level-shifting components. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets JEDEC JESD22-A114/A115/C101 for robust handling in manufacturing and field use. |
Pinout & Package
Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA / OEB | Active-low 3-state enable inputs controlling Group A (pins 2–9) and Group B (pins 18–11) independently. |
| 2–5, 18–15 | DA0–DA3 / DB0–DB3 | Noninverting data inputs for each 4-bit group; direct connection to upstream logic sources. |
| 3–6, 17–14 | OA0–OA3 / OB0–OB3 | 3-state buffered outputs; high-impedance when OEA/OEB = HIGH, otherwise pass-through of corresponding D inputs. |
| 10 | GND | Ground reference for all internal circuitry and output drivers; must be low-impedance connection. |
| 20 | VCC | 5-V power supply input; requires local 0.1 µF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit enables | OEA and OEB allow selective activation of two isolated data paths on a shared bus, reducing external gating logic. |
| Edge-rate controlled outputs | Controlled slew rate minimizes simultaneous switching noise (SSN), easing EMI compliance in mixed-signal boards. |
| Ioff partial-power-down | Outputs automatically enter high-Z when VCC = 0 V, enabling safe insertion/removal in live-backplane systems. |
| TTL-compatible interface | Direct connection to legacy TTL, NMOS, and CMOS without pull-ups, level shifters, or voltage translators. |
| Matched tPLH/tPHL | ≤ 0.5 ns skew between rising/falling edges ensures clean signal integrity for clock and strobe distribution. |
Applications
| Memory Address Buffering | Industrial Bus Transceiver |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or flash devices on a shared memory bus. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state outputs isolates unselected memory chips and prevents bus contention. Use Value: 64-mA sink drive ensures full logic swing across 10+ cm PCB traces; 4.6 ns delay preserves setup/hold margins at 20-MHz bus rates. | Use Scenario: Bidirectional data transfer between a PLC CPU and modular I/O expansion cards via parallel backplane. IC Role / Device Role / Timing Role: Direction-controlled line driver/receiver enabling half-duplex communication over shared 8-bit data lines. Use Value: Independent OEA/OEB pins allow precise timing control of data direction transitions; Ioff prevents backfeed during card hot-swap. |
| Clock Distribution | Legacy System Interface |
Use Scenario: Fan-out of a master system clock to multiple peripheral controllers (UARTs, timers, ADCs) with matched skew. IC Role / Device Role / Timing Role: Low-skew, noninverting clock buffer with 3-state disable for dynamic clock gating. Use Value: Matched rise/fall times (<0.5 ns skew) and 4.6 ns max delay maintain <1% duty-cycle distortion at 100-MHz clock frequencies. | Use Scenario: Interfacing modern FPGA-based controllers to legacy 5-V TTL peripherals (displays, sensors, relays). IC Role / Device Role / Timing Role: Logic-level translator and drive booster ensuring full-voltage compliance with older 5-V standards. Use Value: VIH/VIL thresholds (2.0 V / 0.8 V) and 32-mA source capability guarantee reliable recognition and driving of TTL inputs under worst-case loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT244ATPWR | Same FCT family, identical electrical specs, but TSSOP-20 package (4.4 mm × 6.5 mm); 0.65 mm pitch. | Better suited for space-constrained layouts; thermal resistance θJA = 70°C/W vs. SOIC's 58°C/W. | Select when board area is limited and reflow profile supports fine-pitch TSSOP. |
| 74AC244N | AC logic family: higher speed (tPD ≈ 3.5 ns), but lower drive (24 mA sink), no Ioff, and narrower VCC range (2–6 V). | Lacks partial-power-down protection; unsuitable for hot-swap or multi-rail systems requiring Ioff. | Choose only for cost-sensitive, single-rail 5-V designs where Ioff is not required and layout allows tighter timing margins. |
Compared with SN74FCT244ATPWR and 74AC244N, CY74FCT244ATSOCT offers optimal balance of industrial temperature rating, robust Ioff protection, SOIC-20 manufacturability, and proven noise immunity-making it preferred for mission-critical embedded bus interfaces.
Availability
CY74FCT244ATSOCT is available at Aetrix Electronics and suitable for industrial automation, programmable logic controller (PLC) backplanes, and legacy system upgrades requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for CY74FCT244ATSOCT 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 connectivity solutions for industrial, automotive, and communications markets.
CY74FCT244ATSOCT belongs to TI's FCT logic family, engineered for high-speed, low-noise, 5-V TTL-compatible interfacing in industrial control and computing infrastructure where reliability and bus integrity are critical.
FAQ
What is the maximum operating temperature range for CY74FCT244ATSOCT?
CY74FCT244ATSOCT is rated for operation from –40°C to +85°C, meeting industrial temperature requirements. This range is validated per TI's recommended operating conditions and supported by thermal characterization (θJA = 58°C/W for SOIC-20), making it suitable for deployment in harsh environments such as factory floors and outdoor control cabinets where ambient temperatures exceed commercial limits.
Does CY74FCT244ATSOCT support partial-power-down functionality?
Yes, CY74FCT244ATSOCT includes Ioff circuitry that disables all outputs when VCC = 0 V, limiting Ioff current to ±1 µA. This feature prevents damaging current backflow during hot-swap events or staged power sequencing in multi-rail systems-directly supporting partial-power-down compliance per JEDEC JESD78 guidelines.
What is the propagation delay specification for CY74FCT244ATSOCT?
CY74FCT244ATSOCT has a maximum propagation delay (tPLH/tPHL) of 4.6 ns under recommended operating conditions (VCC = 4.75 V to 5.25 V, TA = –40°C to +85°C, CL = 50 pF). This value is measured from input transition to valid output transition and ensures timing closure in 20-MHz address/data buses with adequate setup/hold margin.
Can CY74FCT244ATSOCT drive TTL loads directly?
Yes, CY74FCT244ATSOCT is fully TTL-compatible: its input thresholds (VIH = 2.0 V, VIL = 0.8 V) match standard TTL, and its 64-mA sink / 32-mA source drive exceeds the 16-mA sink requirement of standard TTL loads. No external pull-ups or level shifters are needed for direct interface with 74LS, 74ALS, or other TTL-series devices.
What package type is used for CY74FCT244ATSOCT?
CY74FCT244ATSOCT uses the SOIC-20 (DW) package: 7.5 mm × 12.8 mm body, 1.27 mm lead pitch, 2.65 mm max height, RoHS-compliant NiPdAu lead finish, and moisture sensitivity level (MSL) 1 (unlimited floor life at ≤30°C/60% RH). This industry-standard package supports automated assembly and is widely supported by PCB design libraries.
CY74FCT244ATSOCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- 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:
- 20-SOIC
CY74FCT244ATSOCT FAQ
1.How can I place an order for CY74FCT244ATSOCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT244ATSOCT 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 CY74FCT244ATSOCT reliable?
The price and inventory of CY74FCT244ATSOCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT244ATSOCT is usually 5 days.
3.What payment methods are accepted for CY74FCT244ATSOCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT244ATSOCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT244ATSOCT?
CY74FCT244ATSOCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT244ATSOCT 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 CY74FCT244ATSOCT?
For technical support, including CY74FCT244ATSOCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT244ATSOCT requirements.
6.How does Aetrix verify that CY74FCT244ATSOCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT244ATSOCT 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 CY74FCT244ATSOCT meets industry standards.
7.What is the process for return or replacement of CY74FCT244ATSOCT?
All CY74FCT244ATSOCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT244ATSOCT, 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 CY74FCT244ATSOCT part is unused and in its original packaging.
Return procedure for CY74FCT244ATSOCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY74FCT244ATSOCT Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
