Texas Instruments CY74FCT16827ATPVC

Overview

CY74FCT16827ATPVC from Texas Instruments is a 20-bit non-inverting three-state buffer/line driver with dual output-enable controls, designed for high-speed bus interface buffering in wide data or address paths. It delivers 64 mA sink / 32 mA source drive strength, supports partial-power-down via I_off, operates at 5V ±10%, and features typical output skew <250 ps - enabling reliable signal integrity in industrial backplane and memory subsystem applications.

For engineers reviewing the CY74FCT16827ATPVC datasheet, CY74FCT16827ATPVC pinout, CY74FCT16827ATPVC application, or CY74FCT16827ATPVC equivalent, key selection criteria include its 8.0 ns max propagation delay (CL = 50 pF), 56-pin SSOP package (O56), −40°C to +85°C industrial temperature range, and dual-NANDed OE architecture for flexible 10-bit or 20-bit bus control.

Technical Context

The CY74FCT16827ATPVC implements two independent 10-bit buffers, each with paired active-low output-enable inputs (OE1/OE2) logically NANDed to provide granular channel control. Its FCT logic family ensures TTL-compatible input thresholds (V_IL = 0.8 V, V_VIH = 2.0 V) and low ground bounce (V_OLP <1.0 V at 64 mA sink).

It integrates I_off circuitry that disables outputs during power-down to prevent backflow current, and uses edge-rate control to suppress switching noise. The device is fully specified for industrial operation at V_CC = 5V ±10% and exhibits 4.5 pF typical input capacitance and 5.5 pF typical output capacitance.

Key Specifications

Pinout & Package

Package: 56-pin SSOP (Shrunk Small Outline Package), O56 footprint (300-mil width), 0.635 mm pitch, 13.9 × 7.9 mm body size, 1.2 mm max height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 20-bit buffer applications.

Compared with CY74FCT16827ATPVC, the CT-speed variant offers faster timing but identical power and packaging, while the 162827A variant trades drive strength for lower noise and balanced sourcing - making the CY74FCT16827ATPVC optimal for cost-sensitive industrial backplanes needing robust sink current and proven thermal margin.

Availability

CY74FCT16827ATPVC is available at Aetrix Electronics and suitable for industrial control systems, memory subsystems, and legacy bus extender designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant SSOP packaging.

Supply support for CY74FCT16827ATPVC 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 decades of heritage in industrial-grade interface ICs.

The CY74FCT16827ATPVC belongs to TI's FCT logic family, engineered specifically for high-noise industrial environments requiring robust 5-V bus buffering with partial-power-down safety and precise timing control.

FAQ

What is the maximum operating frequency supported by CY74FCT16827ATPVC?

The CY74FCT16827ATPVC does not specify a maximum clock frequency directly, but its 8.0 ns maximum propagation delay (A to Y, CL = 50 pF) supports reliable operation up to approximately 20 MHz in synchronous bus applications. System-level timing must account for board trace delays and load capacitance; for 25-MHz+ designs, the faster CY74FCT16827CTPVC variant is recommended. The CY74FCT16827ATPVC remains appropriate for most industrial microcontroller address/data bus extensions.

Does CY74FCT16827ATPVC support hot-swap or live-insertion?

Yes, CY74FCT16827ATPVC supports partial-power-down operation via its I_off feature, which limits reverse current to ±1 µA when V_CC = 0 V. This allows safe insertion into powered backplanes without damaging current backflow. However, external circuitry (e.g., current-limiting resistors on OE lines) is recommended to manage inrush during initial contact. The CY74FCT16827ATPVC is widely deployed in modular PLC carrier systems requiring field-replaceable I/O modules.

What is the pin compatibility between CY74FCT16827ATPVC and CY74FCT162827ATPVC?

CY74FCT16827ATPVC and CY74FCT162827ATPVC share identical 56-pin SSOP (O56) packaging and pinout - including V_CC, GND, A/Y/OE locations - enabling PCB footprint reuse. However, their output drive architectures differ: CY74FCT16827ATPVC provides asymmetric 64 mA sink / 32 mA source, while CY74FCT162827ATPVC offers symmetric 24 mA sink/source. Direct substitution requires validation of load requirements and noise constraints.

Can CY74FCT16827ATPVC be used with 3.3-V logic interfaces?

No, CY74FCT16827ATPVC is a 5-V-only device with V_CC = 5 V ±10% and TTL-compatible input thresholds (V_IL ≤ 0.8 V, V_VIH ≥ 2.0 V). It lacks 3.3-V tolerant inputs or mixed-voltage operation. Interfacing with 3.3-V microcontrollers requires level translation - e.g., using TI's SN74AVC series translators upstream of CY74FCT16827ATPVC. Using it directly with 3.3-V signals risks marginal input recognition and violates absolute maximum ratings.

What thermal considerations apply to CY74FCT16827ATPVC in continuous 20-bit switching?

Under worst-case conditions - all 20 outputs toggling at 10 MHz with 50% duty cycle and 64 mA sink loads - CY74FCT16827ATPVC draws up to 5.5 mA total supply current (per datasheet ICC formula), dissipating <50 mW. Its SSOP package has θ_JA ≈ 90°C/W; thus, ambient temperatures up to +85°C remain within safe junction limits (<125°C) without forced airflow. For high-density layouts, maintain ≥1 mm clearance around the package and avoid copper pours under the body to limit thermal resistance.