Infineon Technologies CY2309CSXC-1T

Overview

CY2309CSXC-1T from Cypress Semiconductor is a 3.3 V zero-delay clock buffer IC with one reference input and nine low-skew CMOS clock outputs (4+4+1 banked configuration), operating from 10 MHz to 133 MHz, featuring on-chip PLL feedback via CLKOUT, 50 ps typical cycle-to-cycle jitter at 66 MHz/15 pF, and test-mode PLL bypass via S2/S1 select inputs - used in high-speed digital timing distribution for FPGA-based communication systems.

For engineers reviewing the CY2309CSXC-1T datasheet, CY2309CSXC-1T pinout, CY2309CSXC-1T application, or CY2309CSXC-1T equivalent, this page delivers verified electrical specs, bank-selectable output control logic, zero-delay loading requirements, industrial-grade temperature operation (–40°C to +85°C), and validated alternatives with functional trade-offs.

Technical Context

The CY2309CSXC-1T integrates an on-chip PLL locked to the REF input, with internal feedback sourced from the CLKOUT pin to achieve zero input-to-output propagation delay. Its dual-bank output architecture (CLKA1–CLKA4 and CLKB1–CLKB4) is controlled by S1/S2 select inputs, enabling dynamic bank enable/disable and PLL bypass.

In S2:S1 = 1:0 mode, the PLL is disabled and REF passes directly to all outputs - converting the device into a non-zero-delay, low-skew fanout buffer with DC-to-133 MHz operation. Power-down mode activates automatically when REF stops toggling, reducing IDD to ≤25 µA.

Key Specifications

Pinout & Package

Package: 16-pin TSSOP (4.4 mm width), RoHS-compliant, moisture-sensitive level 3 - optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

Valid drop-in and functionally aligned alternatives for CY2309CSXC-1T include:

Compared with IDT 5V2310APGI and ON Semi NB3N502DG, CY2309CSXC-1T uniquely combines bank-selectable outputs, auto PLL shutdown, and hardware-testable REF pass-through - making it optimal for systems requiring field-serviceable timing reconfiguration and low-quiescent-power sleep states.

Availability

CY2309CSXC-1T is available at Aetrix Electronics and suitable for FPGA clock distribution, automotive infotainment SoC timing, and industrial PLC backplane synchronization requiring stable component supply, long-term lifecycle support, and industrial-temperature qualification.

Supply support for CY2309CSXC-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) designs high-performance timing, memory, and programmable logic solutions for industrial, automotive, and communications markets.

CY2309C belongs to Cypress's zero-delay clock buffer product line, engineered specifically for low-skew, multi-output clock distribution in space-constrained, high-reliability embedded systems.

FAQ

What is the maximum frequency supported by CY2309CSXC-1T?

The CY2309CSXC-1T supports up to 100 MHz according to the "-1" speed grade designation in Cypress datasheet Rev. *L. While the CY2309C-1H variant operates up to 133 MHz, the -1T suffix confirms commercial/industrial -1 speed bin, with guaranteed performance to 100 MHz under all specified load and temperature conditions.

How does the S2/S1 select logic affect output behavior?

S2 and S1 define four functional states: (0,0) disables both banks and three-states CLKOUT; (0,1) enables Bank A only; (1,0) enables all outputs and bypasses the PLL (REF → outputs directly); (1,1) enables all outputs with active PLL. This logic is hardwired and requires no configuration register access.

Why must CLKOUT be loaded identically to other outputs?

CLKOUT supplies internal PLL feedback; unequal loading shifts the feedback phase, introducing input-to-output delay and degrading zero-delay accuracy. Datasheet Figure 3 quantifies delay vs. loading difference - matching CL on CLKOUT to CLKA/CLKB pins is mandatory for sub-100 ps skew control.

Is CY2309CSXC-1T pin-compatible with CY2309SC-1T?

Yes - CY2309CSXC-1T (TSSOP) and CY2309SC-1T (SOIC) share identical 16-pin pinout and signal mapping per Figure 2 of datasheet 38-07672. Both use same REF, CLKAx, CLKBx, S1/S2, VDD, GND, and CLKOUT assignments; only package dimensions and thermal characteristics differ.