Infineon Technologies CY2308SXC-1T

Overview

CY2308SXC-1T 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-1T datasheet, CY2308SXC-1T pinout, CY2308SXC-1T application, or CY2308SXC-1T equivalent, key selection criteria include zero-input-output delay adjustability via FBK feedback loading, industrial temperature support (–40°C to +85°C), 16-pin SOIC package compatibility, and configuration-specific frequency synthesis (1× reference on both banks).

Technical Context

The CY2308SXC-1T implements a PLL-based zero-delay architecture where the REF input clock locks the internal PLL, and user-selected output drives the external FBK pin to close the loop. Delay is tunable by differential capacitive loading between FBK and output pins.

It features dual-bank output control (CLKA1–A4 and CLKB1–B4), independent three-state enable via S1/S2 logic, and automatic PLL shutdown with <25 µA current draw when REF is inactive. Output phase relationship is deterministic only in -1/-1H configurations.

Key Specifications

Pinout & Package

Package: 16-pin SOIC (150 mil), surface-mount, JEDEC MS-012AC compliant. Thermal resistance θJA = 111°C/W, θJC = 60°C/W.

Key Features

Applications

Equivalent & Alternatives

Cypress CY2308SXC-1T is functionally matched by two alternatives with documented differences in drive strength, frequency range, and configuration flexibility.

Compared with IDT 8T49N241 and ON Semi NB3N3020B, CY2308SXC-1T uniquely balances pin-compatible bank-selectable buffering, field-adjustable zero-delay tuning via FBK loading, and industrial temperature support - making it optimal for legacy-compatible upgrades in telecom and industrial hardware.

Availability

CY2308SXC-1T is available at Aetrix Electronics and suitable for PC motherboard clock distribution, telecom line card timing, and industrial PLC real-time control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY2308SXC-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 fabless semiconductor company specializing in programmable system-on-chip, memory, and timing solutions for embedded and industrial markets.

CY2308 belongs to Cypress's high-performance clock buffer product line, engineered specifically for zero-delay, low-skew clock fanout in computing and communications infrastructure where deterministic timing and thermal robustness are critical.

FAQ

What is the function of the FBK pin on CY2308SXC-1T?

The FBK pin receives external feedback from any selected output to close the internal PLL loop. Connecting CLKA1 (or another output) to FBK enables zero-input-output delay; delay adjustment is achieved by varying capacitive load on FBK relative to other outputs. This external feedback path provides design flexibility unmatched by fixed-ratio buffers.

Does CY2308SXC-1T support 133 MHz operation with 30 pF load?

No. At 133.3 MHz, the datasheet specifies maximum 15 pF load for guaranteed operation. With 30 pF load, maximum supported frequency is 100 MHz for CY2308-1/-2/-3/-4 variants. Exceeding this violates switching characteristics and may cause duty cycle distortion or PLL unlock.

How does S1/S2 logic affect output behavior in CY2308SXC-1T?

S1 and S2 determine bank enablement and PLL bypass: S2=0/S1=0 tri-states both banks; S2=0/S1=1 enables Bank A only; S2=1/S1=0 enables both banks with inverted outputs (for CY2308-2/-3); S2=1/S1=1 enables both banks normally. These states are defined in the Select Input Decoding table on page 3 of the datasheet.

Is CY2308SXC-1T RoHS compliant and halogen-free?

Yes. CY2308SXC-1T is manufactured in compliance with RoHS Directive 2011/65/EU and meets JEDEC JS709B halogen-free requirements (<900 ppm bromine, <900 ppm chlorine, total halogens <1500 ppm), as confirmed in Cypress's official product change notices and material declarations.