Infineon Technologies CY23EP09SXC-1T

Overview

CY23EP09SXC-1T from Cypress Semiconductor is a 2.5 V or 3.3 V zero-delay clock buffer IC with nine low-skew CMOS outputs, integrated PLL for input-output phase alignment, 10–220 MHz operating range, 45 ps typical output-output skew, and 25 ps typical cycle-to-cycle jitter. It serves as a high-precision clock distribution device in FPGA/ASIC timing subsystems requiring deterministic delay and synchronized multi-bank clocking.

For engineers reviewing the CY23EP09SXC-1T datasheet, CY23EP09SXC-1T pinout, CY23EP09SXC-1T application, or CY23EP09SXC-1T equivalent, key selection criteria include zero-delay PLL operation mode, CLKOUT feedback load tuning capability, bank-selectable tri-state control (S1/S2), dual-voltage compatibility, and industrial temperature support (–40°C to +85°C).

Technical Context

The CY23EP09SXC-1T integrates an on-chip PLL with internal feedback sourced from the CLKOUT pin, enabling true zero input-output propagation delay when external loading matches the 5 pF internal load. Its phase alignment is dynamically adjustable via CLKOUT pin capacitance.

It features two independent 4-output banks (CLKA1–CLKA4, CLKB1–CLKB4) plus one dedicated CLKOUT, all driven from a single REF input. Select inputs S1/S2 configure bank enable, tri-state, or PLL bypass modes - including direct REF pass-through from DC to max frequency without PLL lock.

Key Specifications

Pinout & Package

Package: 16-pin TSSOP (4.4 mm × 5.0 mm, 0.65 mm pitch), RoHS-compliant, industrial-grade thermal performance (θJA = 111 °C/W).

Key Features

Applications

Equivalent & Alternatives

Two verified alternatives exist for design flexibility and supply continuity:

Compared with IDT 8T49N241 and ON Semi NB3N502, the CY23EP09SXC-1T uniquely delivers fixed zero-delay operation, nine CMOS outputs with bank-selectable tri-state, and industrial temperature support - making it optimal for deterministic, high-fanout, single-frequency clock distribution where phase alignment is critical.

Availability

CY23EP09SXC-1T is available at Aetrix Electronics and suitable for FPGA clock distribution, DDR memory interface, and PCIe reference clock fanout requiring stable component supply, long-term lifecycle assurance, and industrial temperature qualification.

Supply support for CY23EP09SXC-1T 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

Cypress Semiconductor (now part of Infineon Technologies) is a U.S.-based semiconductor company specializing in high-performance timing, memory, and microcontroller solutions for industrial, automotive, and communications markets.

The CY23EP09 product line delivers zero-delay clock buffers optimized for deterministic, low-jitter clock distribution in FPGA, ASIC, and memory subsystems - prioritizing phase accuracy, multi-bank control, and robust industrial operation.

FAQ

What is the function of the CLKOUT pin beyond providing feedback to the PLL?

The CLKOUT pin serves as the PLL's internal feedback node and also functions as a fully buffered output. Its external load directly adjusts the input-output propagation delay - adding capacitance increases delay, reducing it decreases delay. For zero delay, all outputs (including CLKOUT) must present identical total load (e.g., 5 pF internal + matched external). This enables precise, board-level delay tuning without changing hardware.

How does the S1/S2 select logic affect power consumption in different modes?

In PLL shutdown mode (S2:S1 = 0:0), both output banks are tri-stated and the PLL is disabled, drawing ≤25 µA. In PLL bypass mode (1:0), all outputs drive REF directly with no PLL current - IDD drops to ~15 mA (vs. ~30–45 mA in active PLL mode). This allows dynamic power scaling based on system clocking needs without external control logic.

Can the CY23EP09SXC-1T operate with mixed 2.5 V and 3.3 V supplies on VDD pins?

No - both VDD pins (4 and 13) must be connected to the same supply voltage: either 2.5 V ±10% or 3.3 V ±10%. The device is not designed for split-supply operation. Mixing voltages risks undefined logic states, increased jitter, and potential damage due to internal biasing conflicts across the PLL and output drivers.

What is the significance of the "-1T" suffix in CY23EP09SXC-1T?

The "-1T" suffix denotes the industrial temperature grade (–40°C to +85°C) and TSSOP package (4.4 mm). It distinguishes this variant from the commercial-grade SOIC version (-1C) and the high-drive variant (-1H). The "SXC" prefix confirms it is the standard-drive, TSSOP-packaged, industrial-temp version - validated for extended thermal reliability and traceable lot control.