1 industrial temperature range idt5v2305 2.5v to 3.3v high performance clock buffer 25 3 y 0 25 5 y 1 25 6 y 2 25 11 y 3 25 13 y 4 g 9 control logic clk 16 november 2004 2004 integrated device technology, inc. dsc 6177/20 c industrial temperature range the idt logo is a registered trademark of integrated device technology, inc. features: ? high performance 1:5 clock driver for general purpose applica- tions ? operates up to 170mhz at v dd = 2.5v ? operates up to 200mhz at v dd = 3.3v ? pin-to-pin skew < 75ps at 3.3v operation ?v dd range: 2.3v to 3.6v ? output enable glitch suppression ?25 on-chip series dampening resistors ? available in tssop and vfqfpn packages functional block diagram idt5v2305 2.5v to 3.3v high performance clock buffer description: the idt5v2305 is a high performance, low skew clock buffer that operates up to 200mhz. one bank of five outputs provides low skew copies of clk. through the use of control pin g, the outputs of bank y(0:4) can be placed in a low state regardless of clk input. the device operates in 2.5v and 3.3v environments. the built-in output enable glitch suppression ensures a synchronized output enable sequence to distribute full period clock signals. the idt5v2305 is characterized for operation from -40c to +85c.
2 industrial temperature range idt5v2305 2.5v to 3.3v high performance clock buffer pin configuration tssop top view gnd v dd y 1 y 0 y 2 gnd clk v dd y 4 v dd gnd y 3 v dd g 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 gnd v dd capacitance (t a = +25c, f = 1mhz, v in = 0v) parameter description min. typ. max. unit c in input capacitance ? 2.5 ? pf v i = 0v or v dd symbol description max unit v dd power supply voltage ?0.5 to +4.6 v v i input voltage (2) ?0.5 to v dd +0.5 v v o output voltage (2) ?0.5 to v dd +0.5 v i ik input clamp current 50 ma v i < 0 or v i > v dd i ok output clamp current 50 ma v o < 0 or v o > v dd i o continuous total output current 50 ma v o < 0 to v dd t stg storage temperature ?65 to +150 c absolute maximum ratings (1) notes: 1. stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. not to exceed 4.6v. vfqfpn top view 11 y 3 6 y 2 2 3 1 v dd 16 15 14 12 13 nc nc y 4 v dd v dd 8 v dd 5 y 1 g 4 y 0 nc 9 clk 10 nc 7 v dd gnd function table (1) note: 1. h = high voltage level l = low voltage level x = don?t care inputs output gclk y (0:4) lx l hh h
3 industrial temperature range idt5v2305 2.5v to 3.3v high performance clock buffer symbol description min. typ. max. unit v dd internal power supply voltage 2.3 2.5 v 3.3 3.6 v il input voltage low v dd = 3v to 3.6v 0.8 v v dd = 2.3v to 2.7v 0.7 v ih input voltage high v dd = 3v to 3.6v 2 v v dd = 2.3v to 2.7v 1.7 v i input voltage 0 v dd v i oh output current high v dd = 3v to 3.6v -12 ma v dd = 2.3v to 2.7v -6 i ol output current low v dd = 3v to 3.6v 12 ma v dd = 2.3v to 2.7v 6 t a ambient operating temperature -40 +85 c recommended operating range note: 1. all typical values are at respective nominal v dd . dc electrical characteristics - v dd = 3.3v 0.3v symbol parameter test conditions min. typ. (1) max unit v dd = min. to max. i oh = -100 av dd - 0.2 v oh high level output voltage v dd = 3v i oh = -12ma 2.1 v i oh = -6ma 2.4 v dd = min. to max. i oh = 100 a 0.2 v ol low level output voltage v dd = 3v i oh = 12ma 0.8 v i oh = 6ma 0.55 v dd = 3v v o = 1v -28 i oh high level output current v dd = 3.3v v o = 1.65v -36 ma v dd = 3.6v v o = 3.135v -14 v dd = 3v v o = 1.95v 28 i ol low level output current v dd = 3.3v v o = 1.65v 36 ma v dd = 3.6v v o = 0.4v 14 note: 1. for i dd over frequency, see test circuit and waveforms. dc electrical characteristics over operating range symbol parameter test conditions min. typ. max unit v ik input voltage v dd = 3v, i in = -18ma - 1.2 v i in input current v i = 0v or v dd 5 a i dd static device current (1) clk = 0v or v dd , i o = 0ma, v dd = 3.3v 25 a pin description terminal symbol i/o description g i output enable control for y (0:4) outputs. this output enable is active high. if this pin is logic high, the y (0:4) clock outputs will follow the input clock (clk). if this pin is logic low, the y (0:4) outputs will drive low independent of the state of clk. y (0:4) o buffered output clocks clk i input reference frequency gnd ground v dd pwr dc power supply, 2.3v to 3.6v
4 industrial temperature range idt5v2305 2.5v to 3.3v high performance clock buffer note: 1. all typical values are at respective nominal v dd . dc electrical characteristics - v dd = 2.5v 0.2v symbol parameter test conditions min. typ. (1) max unit v oh high level output voltage v dd = min. to max. i oh = -100 av dd - 0.2 v v dd = 2.3v i oh = -6ma 1.8 v ol low level output voltage v dd = min. to max. i oh = 100 a 0.2 v v dd = 2.3v i oh = 6ma 0.55 v dd = 2.3v v o = 1v -17 i oh high level output current v dd = 2.5v v o = 1.25v -25 ma v dd = 2.7v v o = 2.375v -10 v dd = 2.3v v o = 1.2v 17 i ol low level output current v dd = 2.5v v o = 1.25v 25 ma v dd = 2.7v v o = 0.3v 10 timing requirements over recommended range symbol parameter test conditions min. typ. max unit f clk clock frequency v dd = 3v to 3.6v 0 200 mhz v dd = 2.3v to 2.7v 0 170
5 industrial temperature range idt5v2305 2.5v to 3.3v high performance clock buffer switching characteristics over operating range - v dd = 2.5v 0.2v (1) symbol parameter test conditions min. typ. (1) max unit t plh clk to yx f = 0mhz to 170mhz, c l = 25pf 1.5 3 ns t phl t sk ( o ) (2) output skew, yx to yx 100 ps t sk ( p ) pulse skew 350 ps t sk ( pp ) part-to-part skew 600 ps t r rise time v o = 0.4v to 1.7v (3) 0.4 1.625 v/ns t f fall time v o = 1.7v to 0.4v (3) 0.4 1.625 v/ns t su g before clk v( threshold ) = v dd /2 0.1 ns t h g after clk 0.4 notes: 1. all typical values are at respective nominal v dd . 2. this specification is only valid for equal loading of all outputs. 3. measured at 100mhz. switching characteristics over operating range - v dd = 3.3v 0.3v (1) symbol parameter test conditions min. typ. (1) max unit t plh clk to yx f = 0mhz to 200mhz, c l = 25pf 1.3 2.6 ns t phl t sk ( o ) (2) output skew, yx to yx 75 ps t sk ( p ) pulse skew 200 ps t sk ( pp ) part-to-part skew 500 ps t r rise time v o = 0.4v to 2v (3) 0.7 2.3 v/ns t f fall time v o = 2v to 0.4v (3) 0.7 2.3 v/ns t su g before clk v( threshold ) = v dd /2 0.1 ns t h g after clk 0.4 notes: 1. all typical values are at respective nominal v dd . 2. this specification is only valid for equal loading of all outputs. 3. measured at 100mhz.
6 industrial temperature range idt5v2305 2.5v to 3.3v high performance clock buffer clk t en t dis gx yx output enable glitch suppression circuit the purpose of the glitch suppression circuitry is to ensure the output enable sequence is synchronized with the clock input su ch that the output buffer will be enabled on the next full period of the input clock (negative edge triggered by the input clock). the g input must be stable on e t en - time prior to the falling edge of the clk for predictable operation. g (t en , t dis ) relative to clk
7 industrial temperature range idt5v2305 2.5v to 3.3v high performance clock buffer clk v dd 50% v dd 0v t plh t phl 1.7v or 2v 0.4v 0.4v t r t f v oh 50% v dd v ol yx clk v dd 0v v oh v oh v ol v ol 50% v dd 50% v dd t sk(o) t sk(o) any y any y v dd v oh 0v v ol 50% v dd 50% v dd t plh t phl clk yx t sk(p) = t plh t phl from output under test c l 500 ? test load circuit output skew test circuits and waveforms voltage waveforms propagation delay times pulse skew notes: 1. c l includes probe and jig capacitance. 2. all input pulses are supplied by generators having the following characteristics: prr 200mhz; z o = 50 ? ; t r < 1.2ns; t f < 1.2ns.
8 industrial temperature range idt5v2305 2.5v to 3.3v high performance clock buffer recommended landing pattern nr 16 pin note: all dimensions are in millimeters.
9 industrial temperature range idt5v2305 2.5v to 3.3v high performance clock buffer ordering information idt xxxxx xx package device type 5v2305 2.5v to 3.3v high performance clock buffer package x -40c to +85c (industrial) i thin shrink small outline package tssop - green thermally enhanced plastic very fine pitch quad flat no lead package vfqfpn - greeen pg pgg nr nrg corporate headquarters for sales: for tech support: 6024 silver creek valley road 800-345-7015 or 408-284-8200 clockhelp@idt.com san jose, ca 95138 fax: 408-284-2775 www.idt.com
|
