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CDCE937
  • CDCE937

CDCE937

ACTIVE

Programmable 3-PLL VCXO clock synthesizer with 2.5-V or 3.3-V LVCMOS outputs

Texas Instruments CDCE937 Product Info

1 April 2026 0

Parameters

Number of outputs

7

Output type

LVCMOS

Output frequency (max) (MHz)

230

Core supply voltage (V)

1.8

Output supply voltage (V)

2.5, 3.3

Input type

LVCMOS, XTAL

Operating temperature range (°C)

-40 to 85

Features

Integrated EEPROM, Multiplier or divider, Spread-spectrum clocking (SSC)

Rating

Catalog

Package

TSSOP (PW)-20-41.6 mm² 6.5 x 6.4

Features

  • Member of Programmable Clock Generator Family
    • CDCEx913: 1PLL, 3 Outputs
    • CDCEx925: 2PLL, 5 Outputs
    • CDCEx937: 3PLL, 7 Outputs
    • CDCEx949: 4LL, 9 Outputs
  • In-System Programmability and EEPROM
    • Serial Programmable Volatile Register
    • Nonvolatile EEPROM to Store Customer Setting
  • Flexible Input Clocking Concept
    • External Crystal: 8MHz to 32MHz
    • On-Chip VCXO: Pull Range ±150ppm
    • Single-Ended LVCMOS up to 160MHz
  • Free Selectable Output Frequency up to 230MHz
  • Low-Noise PLL Core
    • PLL Loop Filter Components Integrated
    • Low Period Jitter (Typical 60ps)
  • Separate Output Supply Pins
    • CDCE937: 3.3V and 2.5V
    • CDCEL937: 1.8V
  • Flexible Clock Driver
    • Three User-Definable Control Inputs [S0/S1/S2], for Example, SSC Selection, Frequency Switching, Output Enable or Power Down
    • Generates Highly Accurate Clocks for Video, Audio, USB, IEEE1394, RFID, Bluetooth™, WLAN, Ethernet™, and GPS
    • Generates Common Clock Frequencies Used With TI DaVinci™, OMAP™, DSPs
    • Programmable SSC Modulation
    • Enables 0PPM Clock Generation
  • 1.8V Device Power Supply
  • Wide Temperature Range –40°C to 85°C
  • Packaged in TSSOP
  • Development and Programming Kit for Easy PLL Design and Programming (TI Pro-Clock™)
  • Member of Programmable Clock Generator Family
    • CDCEx913: 1PLL, 3 Outputs
    • CDCEx925: 2PLL, 5 Outputs
    • CDCEx937: 3PLL, 7 Outputs
    • CDCEx949: 4LL, 9 Outputs
  • In-System Programmability and EEPROM
    • Serial Programmable Volatile Register
    • Nonvolatile EEPROM to Store Customer Setting
  • Flexible Input Clocking Concept
    • External Crystal: 8MHz to 32MHz
    • On-Chip VCXO: Pull Range ±150ppm
    • Single-Ended LVCMOS up to 160MHz
  • Free Selectable Output Frequency up to 230MHz
  • Low-Noise PLL Core
    • PLL Loop Filter Components Integrated
    • Low Period Jitter (Typical 60ps)
  • Separate Output Supply Pins
    • CDCE937: 3.3V and 2.5V
    • CDCEL937: 1.8V
  • Flexible Clock Driver
    • Three User-Definable Control Inputs [S0/S1/S2], for Example, SSC Selection, Frequency Switching, Output Enable or Power Down
    • Generates Highly Accurate Clocks for Video, Audio, USB, IEEE1394, RFID, Bluetooth™, WLAN, Ethernet™, and GPS
    • Generates Common Clock Frequencies Used With TI DaVinci™, OMAP™, DSPs
    • Programmable SSC Modulation
    • Enables 0PPM Clock Generation
  • 1.8V Device Power Supply
  • Wide Temperature Range –40°C to 85°C
  • Packaged in TSSOP
  • Development and Programming Kit for Easy PLL Design and Programming (TI Pro-Clock™)

Description

The CDCE937 and CDCEL937 devices are modular PLL-based low cost, high-performance, programmable clock synthesizers, multipliers and dividers. The devices generate up to 7 output clocks from a single input frequency. Each output can be programmed in-system for any clock frequency up to 230MHz, using up to three independent configurable PLLs.

The CDCEx937 has separate output supply pins, VDDOUT, which is 1.8V for CDCEL937 and to 2.5V to 3.3V for CDCE937.

The input accepts an external crystal or LVCMOS clock signal. If an external crystal is used, an on-chip load capacitor is adequate for most applications. The value of the load capacitor is programmable from 0 to 20pF. Additionally, an on-chip VCXO is selectable which allows synchronization of the output frequency to an external control signal, that is, PWM signal.

The CDCE937 and CDCEL937 devices are modular PLL-based low cost, high-performance, programmable clock synthesizers, multipliers and dividers. The devices generate up to 7 output clocks from a single input frequency. Each output can be programmed in-system for any clock frequency up to 230MHz, using up to three independent configurable PLLs.

The CDCEx937 has separate output supply pins, VDDOUT, which is 1.8V for CDCEL937 and to 2.5V to 3.3V for CDCE937.

The input accepts an external crystal or LVCMOS clock signal. If an external crystal is used, an on-chip load capacitor is adequate for most applications. The value of the load capacitor is programmable from 0 to 20pF. Additionally, an on-chip VCXO is selectable which allows synchronization of the output frequency to an external control signal, that is, PWM signal.

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