Terminology » RF Components » JESD204A vs. JESD204B: Key Differences Explained

JESD204A vs. JESD204B: Key Differences Explained

jesd204 data converter high speed interface protocol

This article compares JESD204A and JESD204B, highlighting the key differences between the two standards in a tabular format.

Key Feature Comparison: JESD204A vs. JESD204B

The following table summarizes the main differences between JESD204A and JESD204B:

FeaturesJESD204AJESD204B
Interface DiagramsJESD204AJESD204B
Release20082011
Lane Rate (Maximum)3.125 Gbps12.5 Gbps
Clock SignalThe frame clock signal in the system is equal to the frame rate of the data on the link. In JESD204A, the frame clock is the master timing reference.The device clock signal in the system can be used to derive the frame rate of the data on the link. In JESD204B, the frame clock is no longer the master system reference.
SYNCA system synchronous, active low signal from the receiver to the transmitter denotes the state of synchronization.Same as JESD204A, except synchronous to the local multi-frame clock (LMFC) instead of the frame clock.
Lane 0,…,L-1Differential lanes on the link (typically high-speed CML). 8B/10B code groups are transmitted MSB first/LSB last.Same as JESD204A
Multiple LanesSupportedSupported
Lane SynchronizationSupportedSupported
Multi-Device SynchronizationSupportedSupported
Deterministic LatencyNot SupportedSupported
Harmonic ClockingNot SupportedSupported