Infineon Technologies CY2308SXC-2T

Overview

CY2308SXC-2T from Cypress Semiconductor is a 3.3 V zero-delay clock buffer with on-chip PLL, designed for high-speed clock distribution in PC, workstation, and telecom systems. It delivers 10–133 MHz operation, <200 ps output-to-output skew, 75 ps typical cycle-to-cycle jitter at 66 MHz/15 pF, and supports two banks of four three-stateable outputs controlled by S1/S2 select inputs.

For engineers reviewing the CY2308SXC-2T datasheet, CY2308SXC-2T pinout, CY2308SXC-2T application, or CY2308SXC-2T equivalent, key selection considerations include zero-input-output delay adjustability via FBK feedback loading, industrial temperature range (–40°C to +85°C), 16-pin SOIC package, dual-bank output enable control, and PLL power-down mode drawing <25 µA.

Technical Context

The CY2308SXC-2T implements a PLL-based zero-delay architecture where the REF input clock is locked to an external feedback signal applied to the FBK pin-enabling user-selectable output-to-FBK routing for precise delay tuning. Its internal MUX and divider logic supports configuration-specific frequency synthesis (e.g., 1×/2× or 2×/4× per bank) depending on feedback source and S1/S2 state.

It features two independent output banks (A and B), each with four CMOS-compatible clock outputs, individually three-statable via S1/S2 decoding. The device enters low-power shutdown (<25 µA) when REF lacks rising edges or under specific S1/S2 combinations, and maintains sub-700 ps inter-device skew across synchronized systems.

Key Specifications

Pinout & Package

16-pin SOIC (150 mil) package with exposed pad not present; standard JEDEC MS-012AC outline; RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

CY2308SXC-2T is part of the CY2308 family; alternatives must match its -2 configuration (1×/2× dual-bank output), industrial temperature grade, and SOIC package.

Compared with CY2308SXI-2T and ICS8302AMLF, CY2308SXC-2T uniquely enables field-adjustable zero-delay via FBK load tuning and offers superior thermal performance in SOIC, making it optimal for thermally demanding industrial applications requiring both precision skew control and reliability.

Availability

CY2308SXC-2T is available at Aetrix Electronics and suitable for PC motherboard clock distribution, telecom line card timing, and industrial Ethernet controller timing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY2308SXC-2T 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 computing, communications, and industrial markets.

The CY2308 product line delivers configurable zero-delay clock buffers optimized for high-speed digital systems requiring low-jitter, low-skew, and flexible frequency synthesis without external PLL components.

FAQ

What is the function of the FBK pin in CY2308SXC-2T?

The FBK pin receives external feedback from any CLKA or CLKB output to close the internal PLL loop. Connecting a selected output to FBK determines the effective division ratio and enables zero-input-output delay adjustment via capacitive loading differences between the feedback output and other outputs.

How does the S1/S2 select input decoding affect output behavior?

S1 and S2 configure bank enablement, PLL bypass, and power-down mode. For example, S2=0/S1=0 places both banks in three-state; S2=1/S1=0 enables Bank A while tri-stating Bank B and bypassing the PLL for direct REF-to-output pass-through in CY2308-2/-3 variants.

Can CY2308SXC-2T operate with a 25 MHz input clock?

Yes. The device supports input frequencies from 10 MHz to 133.3 MHz. At 25 MHz, it delivers stable 25 MHz or 50 MHz outputs (depending on configuration), with duty cycle maintained at 45–55% and jitter <200 ps, meeting requirements for legacy PCI and industrial microcontroller clocks.

Is thermal derating required for continuous operation at +85°C?

No additional derating is required. The CY2308SXC-2T is fully characterized for industrial temperature operation (–40°C to +85°C), with IDD current specified up to 70 mA at 100 MHz and 85°C ambient, and thermal resistance (θJA = 111 °C/W) validated per JEDEC JESD51 standards.