SN65LV1021DBG4

Overview

The SN65LV1021DBG4 is a serializer component from the Texas Instruments SN65LV1021 series, designed as part of a 10-bit LVDS serdes chipset. It operates with system clock frequencies ranging from 10 MHz to 40 MHz, translating to serial data rates between 120 Mbps and 480 Mbps. The device accepts parallel LVTTL inputs and transmits serialized differential LVDS outputs. It utilizes a 28-pin SSOP package and supports an industrial temperature range of -40°C to +85°C. Power consumption is typically under 350 mW at 40 MHz.

Feature Summary

• Supports rapid synchronization mode using internally generated SYNC patterns for deterministic lock times.
• Capable of random-lock synchronization to allow operation in open-loop applications and hot insertion.
• Includes programmable edge trigger selection for both transmit and receive clock strobing.
• Features dedicated power-down and high-impedance modes to minimize supply current during idle states.

Applications

• Serializing parallel data for transmission over differential backplanes
• Data communication over unshielded twisted pair (UTP) cables
• High-speed interface solutions requiring low power consumption

Procurement Notes

Verify that the specific ordering suffix 'G4' corresponds to lead-free and RoHS-compliant manufacturing standards as defined by Texas Instruments. Confirm the package type matches the required PCB footprint and ensure the operating temperature range aligns with the intended environmental conditions before finalizing procurement.

Selection Notes

Select this serializer when paired with the SN65LV1212 deserializer to form a complete 10-bit serdes link. Ensure the design accommodates separate analog and digital power supplies (AVCC and DVCC). Verify that the input clock frequency remains within the specified 10 MHz to 40 MHz range for proper PLL locking and data integrity.

Part Context

This component belongs to the SN65LV1021 family of LVDS serializers manufactured by Texas Instruments. It serves as the transmitting half of a chipset designed to replace wide parallel buses with serial LVDS links. The device is characterized for industrial temperatures and offers pin-compatible alternatives within the broader LVDS interface portfolio.

Replacement Considerations

The SN65LV1021DB is the non-RoHS equivalent. For deserialization, the SN65LV1212 is the paired component. Check datasheets for any superseding models or updated packaging options if long-term availability is a constraint.

FAQ

How does the synchronization mode improve lock time?

The serializer can transmit specific SYNC patterns consisting of six ones and six zeros. This allows the deserializer to lock to the signal within a deterministic timeframe, rather than waiting for random data transitions.

What is the function of the TCLK_R/F pin?

The TCLK_R/F pin selects the clock edge used to strobe incoming parallel data. Driving it low selects the falling edge, while driving it high selects the rising edge of the TCLK signal.

How is the device placed into a low-power state?

Driving the PWRDN pin low turns off the internal PLL and places the outputs into a high-impedance state, significantly reducing supply current to the milliampere range.