Short-Form Datasheet HXT14450 56Gbps Linear PAM4 VCSEL Driver with CDR The HXT14450 is a quad-channel, low power, linear Features vertical-cavity surface-emitting laser (VCSEL) driver Quad 56Gb/s PAM4 VCSEL Driver integrated with an integrated clock and data recovery (CDR) with a low latency CDR unit. The chip is designed for MMF PMD Short- Low power typical 490 mW per channel Reach applications that support 200G per port with Supports up to 11mA modulation current to a signaling rate up to 56Gbps PAM4 modulation. In VCSEL conjunction with the HXR14450 a quad-channel transimpedance amplifier (TIA) receiver with an Programmable 8-bit IMOD and IBIAS control integrated CDR, one can produce compact quad Auto-Adaptive CTLE and DFE small form factor QSFP-type modules to serve high Support reference-less and reference clock speed optical interconnects in data center modes applications. On-chip testability: eye opening monitor (EOM), The HXT14450 has a built-in auto-adaptive jitter tolerance (JTOL), PRBS generator, error continuous-time linear equalizer (CTLE) and a checker decision-feedback equalizer (DFE), which can work Integrated temperature sensor in chip-to-module and chip-to-chip interconnects. Input and output polarity inversion The chipsets provide on-chip testability such as PRBS generator and error checker. Programmable TX test pattern generation TX Disable, programmable loss of signal (LOS) Applications and output de-emphasis 200G QSFP56 SR4 and 400G QSFP-DD or 2 I C interface control: standard and fast modes OSFP SR8 Ethernet Modules and AOC 400G OBO Modules Support CEI-56G-VSR-PAM4 Figure 1. Block Diagram X0010044 Rev.1.0 Page 1 Dec.7.20 HXT14450 Short-Form Datasheet Orderable Part Number Temperature Range Dimensions 1 HXT14450-DNU -5C to +95C Die: 3320.1 x 1265.4m 2 HXT14450-TNU HXX14450-EVB Room Temperature - 1. Waffle pack 2. Blue tape For price, delivery schedules, and to place orders, please contact Renesas at www.renesas.com/us/en/buy- sample/locations. X0010044 Page 2 Dec.7.20