PDF 83948I Data sheet ( Hoja de datos )

Número de pieza	83948I
Descripción	1-to-12 Differential-toLVCMOS/LVTTL Fanout Buffer
Fabricantes	IDT
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No Preview Available ! Low Skew, 1-to-12 Differential-to- LVCMOS/LVTTL Fanout Buffer 83948I Datasheet PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 General Description Features The 83948I is a low skew, 1-to-12 Differential-to-LVCMOS/LVTTL Fanout Buffer and a member of the family of High Performance Clock Solutions from IDT. The 83948I has two selectable clock inputs. The CLK, nCLK pair can accept most standard differential input levels. The LVCMOS_CLK can accept LVCMOS or LVTTL input levels. The low impedance LVCMOS/LVTTL outputs are designed to drive 50 series or parallel terminated transmission lines. The effective fanout can be increased from 12 to 24 by utilizing the ability of the outputs to drive two series terminated lines. The 83948I is characterized at full 3.3V core/3.3V output. Guaranteed output and part-to-part skew characteristics make the 83948I ideal for those clock distribution applications demanding well defined performance and repeatability. • Twelve LVCMOS/LVTTL outputs • Selectable differential CLK/nCLK or LVCMOS/LVTTL clock input • CLK/nCLK pair can accept the following differential input levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL • LVCMOS_CLK supports the following input types: LVCMOS, LVTTL • Maximum output frequency: 250MHz • Output skew: 350ps (maximum) • Part-to-part skew: 1.5ns (maximum) • 3.3V core, 3.3V output • -40°C to 85°C ambient operating temperature • Available in lead-free (RoHS 6) package • For drop in replacement part use 83948i-147 CLK_EN Pullup LVCMOS_CLK Pullup CLK Pullup nCLK Pulldown 1 0 CLK_SEL Pullup Block Diagram D Q OE Pullup ©2016 Integrated Device Technology, Inc Pin Assignment 32 31 30 29 28 27 26 25 Q0 CLK_SEL 1 LVCMOS_CLK 2 24 GND 23 Q4 Q1 CLK 3 22 VDDO Q2 nCLK 4 CLK_EN 5 Q3 OE 6 Q4 VDD 7 21 Q5 20 GND 19 Q6 18 VDDO Q5 GND 8 17 Q7 9 10 11 12 13 14 15 16 Q6 Q7 83948I Q8 32-Lead LQFP Q9 7mm x 7mm x 1.4mm package body Q10 Y Package Top View Q11 1 May 19, 2016 1 page Parameter Measurement Information 1.65V±0.15V VDD, VDDO SCOPE Qx GND -1.65V±0.15V 3.3V Core/3.3V LVCMOS Output Load AC Test Circuit VDD nCLK CLK V PP GND Cross Points Differential Input Level 83948I Datasheet V CMR Part 1 Qx V DDO 2 Part 2 Qy V DDO 2 t sk(pp) Part-to-Part Skew V DDO Qx 2 V DDO Qy 2 t sk(o) Output Skew 0.8V Q0:Q11 2V tR Output Rise/Fall Time 2V 0.8V tF Q0:Q11 VDDO 2 t PW odc = t PW t PERIOD VDDO 2 t PERIOD Output Pulse Width VDDO 2 ©2016 Integrated Device Technology, Inc 5 May 19, 2016 5 Page 83948I Datasheet Ordering Information Table 8. Ordering Information Part/Order Number 83948AYILF 83948AYILFT Marking ICS83948AYIL ICS83948AYI Package “Lead-Free” 32 Lead LQFP “Lead-Free” 32 Lead LQFP Shipping Packaging Tray Tape & Reel Temperature -40C to 85C -40C to 85C ©2016 Integrated Device Technology, Inc 11 May 19, 2016 11 Page

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