840NT4-01NLGI Renesas

VDD GND QB PSELB VDDO B PLL SELA QB0 PLL SELB QB1 GNDA QB2 VDDA VDDO B GND OE B VDD VDDO C RESERVED QC VDD GND QC XTAL SEL OE C GND XTAL GND REF Ethernet & USB Clock Generator for 840NT4-01 Freescale B4/T4-based Systems DATA SHEET General Description Features The 840NT4-01 is clock generator designed to provide ethernet and Ten LVCMOS clock outputs: USB clocks for Freescale B4/ T4-based systems. The 840NT4-01 Five LVCMOS 125MHz Ethernet outputs utilizes IDTs FemtoClock NG PLL technology to synthesize eight Three LVCMOS 25MHz /125MHz Ethernet outputs low phase-jitter Ethernet reference clocks. The clock generator also One LVCMOS 24MHz USB output provides a 24MHz USB reference clock and a 25MHz reference One LVCMOS 25MHz REF output output. QREF output can be used to drive other clock drivers, saving a crystal Recommended Application: Selectable crystal or differential LVPECL input Freescale B4/ T4 Ethernet /USB clock generator RMS Phase Jitter, 125MHz, integration range 12kHz - 20MHz: 0.60ps (typical) Output Features: Five LVCMOS 125MHz Ethernet outputs Cycle-to-Cycle jitter: 20ps (typical) Three LVCMOS 25MHz/ 125MHz Ethernet outputs Flexible voltage supply modes supports legacy and future system requirements, minimizes power consumption One LVCMOS 24MHz USB output Core voltage: V , V , V DD DD XTAL DDA One LVCMOS 25MHz REF output Output voltage: V , V , V V DDO A DDO B DDO C, DDO REF Core / Output 3.3V / 3.3V 3.3V / 2.5V 3.3V / 1.8V 2.5V / 2.5V 2.5V / 1.8V -40C to 85C ambient operating temperature Lead-free (RoHS 6) packaging Pin Assignment Table 1. Output Frequency Table F (MHz) OUT PD* PLL PLL (MHz) PSELB SELA SELB QA 4:0 QB 2:0 QC QREF 3635 3433 32 313029 28 27 26 25 25 0 0 0 125 125 24 25 37 24 38 23 25 1 0 0 125 125 24 25 39 22 25 0 0 1 125 25 24 25 40 21 25 1 0 1 125 25 24 25 41 20 840NT4-01 42 19 *PD = Phase Detector input frequency. 43 18 44 17 45 16 46 15 47 14 48 13 1 2 3 4 5 6 7 8 9 10 11 12 48-lead, 7.0mm x 7.0mm VFQFN REVISION 2 05/18/15 1 2015 Integrated Device Technology, Inc. XTAL IN GND XTAL OUT GND QA VDD XTAL OE A PCLK QA0 nPCLK QA1 GND VDDO A VDD VDDO A PDIV SEL QA2 GND DSM QA3 OE REF QA4 VDDO REF GND QA QREF GND840NT4-01 DATA SHEET Block Diagram VDD VDDO REF Pullup OE REF 25MHz QREF Pullup OE A Pullup OE B VDDO A Pullup PLL SELA 125MHz Pulldown XTAL SEL QA0 XTAL IN VDDA 25MHz OSC QA1 FemtoclockNG XTAL OUT Pulldown QA2 PCLK Phase Detector nPCLK Pullup/ Pulldown VCO QA3 5 MM Pulldown PDIV SEL QA4 N1 VDDO B 125MHz/ 25MHz QB0 N2 QB1 QB2 Pulldown PSELB Pullup PLL SELB VDDO C Pullup OE C 24MHz NFRAC QC ETHERNET & USB CLOCK GENERATOR FOR FREESCALE 2 REVISION 2 05/18/15 B4/T4-BASED SYSTEMS