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STMUX3040
First octal SPDT high speed bi-directional PCIE switch with integrated Voltage Regulator
STMUX3040QTTR Product Page
ST’s new STMUX3040 is a differential Single Pole Double Throw (SPDT) 2 to 1, low Ron, bi-directional signal switch designed for PCIe (Peripheral Component Interconnect Express) signaling.
Providing very low cross-talk, low bit-to-bit skew, high channel-to-channel noise isolation and low I/O capacitance, this switch offers very little or practically no attenuation of the high-speed signals at the outputs, thus preserving the signal integrity.
STMUX3040
An integrated voltage regulator allows operation at a 3.3 V power supply if necessary. The integrated voltage regulator is bypassed automatically if supply voltage is 1.8 V.
Using STMUX3040 as a PCIe signal switch, systems are able to dynamically reallocate PCIe lanes to the slots that require higher bandwidth, giving the system the ability of optimize performance of different PCIe peripherals.

STMUX3040
PCIe resource allocations

STMUX3040 could be used as a general purpose high-speed low resistance signal switch. For example, the LVDS connection between multiple GPU and a single LCD in high performance notebooks.

STMUX3040 Key Features

Supports PCI Express signaling at 2.5 Gbps
Supports 3.0 Gbps generic data rate
OCTAL SPDT switch to support 2 PCI lanes
Low Ron: 5.5 Ω typical
Internal voltage regulator
VCC operating range
  1.65 to 2.0 V (Internal Regulator Bypassed)
2.7 to 3.6 V (Internal Regulator Active)
Low current consumption: 150 μA
ESD HBM Model : 2 kV
Channel on capacitance: 6 pF typical
Switching time speed: 9 ns
Propagation delay: 250 ps
Bandwidth: -3 dB at 1200 MHz
Low crosstalk: -20 dB at 1200 MHz
Bit to bit skew: 50 ps typical
Data and control inputs provide undershoot clamp diode
Wide bandwidth minimizes skew and jitter
Supports bi-directional operation
-40 °C to 85 °C operating temperature range
TQFN42 package

Targeted Applications

STMUX3040 is designed for systems that require switching of high speed signals:
Performance PC motherboards
Workstations
LVDS lines switching

Ordering Code

Part number
Package
TQFN42

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