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Product Detailed Parameters
- Description：IC MULTIPLEXER 1 X 4:1 32MLF
- Series：Precision Edge®
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Multiplexer
- Circuit：1 x 4:1
- Independent Circuits：1
- Current - Output High, Low：-
- Voltage Supply Source：Single Supply
- Voltage - Supply：3V ~ 3.6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：32-VFQFN Exposed Pad
- Supplier Device Package：32-QFN (5x5)
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Overview
The SY89547LMG-TR is a Precision Edge® differential multiplexer manufactured by Microchip Technology. It selects among four differential inputs and provides two copies of the selected input via LVDS outputs. The device supports data rates up to 3.2 Gbps with an internal propagation delay of less than 620 ps. It operates on a single 3.3V power supply within a temperature range of -40°C to +85°C. The component is housed in a 32-pin MLF package measuring 5mm x 5mm.
Feature Summary
- Provides two copies of the selected differential input signal
- Features unique input isolation design to minimize crosstalk
- Includes internal termination accessible through VT pins for flexible interfacing
- Accepts both DC-coupled and AC-coupled inputs
Applications
- SONET/SDH multi-channel select applications
- Fibre Channel applications
- GigE applications
Procurement Notes
Verify that the ordering suffix TR corresponds to the Tape and Reel packaging format, distinct from the tube variant. Confirm the specific lead finish (NiPdAu) associated with the 'G' suffix against current manufacturer documentation. Ensure the part number matches the exact functional specification required for the target application.
Selection Notes
Select this component when dual differential outputs are required from a single selected input source. Consider the SY89546U if a 2.5V supply voltage is necessary instead of 3.3V. Choose the SY89544U or SY89545L if only one differential output is needed for the design.
Part Context
This device belongs to Micrel's Precision Edge product family, now under Microchip Technology. It is designed for high-speed signal routing where low jitter and minimal crosstalk are critical. The internal termination network simplifies interface design by reducing the need for external resistor-bias components.
Replacement Considerations
SY89545LMG
FAQ
How does the device handle unused differential input pairs?
Unused differential input pairs should be terminated by connecting one input to VCC and the complementary input to GND through a 1kΩ resistor, while leaving the corresponding VT pin open.
What logic standards are supported by the inputs?
The unique input termination and VT pin allow the device to accept DC-coupled and AC-coupled inputs compatible with LVDS, LVPECL, and CML standards.
