industrial temperature range idt74lvc4245a cmos octal bus transceiver and 3.3v to 5v shifter 1 july 2000 industrial temperature range the idt logo is a registered trademark of integrated device technology, inc. ? 2000 integrated device technology, inc. dsc-4754/1 features: ? 0.5 micron cmos technology ?v cca = 5v 0.5v ?v ccb = 2.7v to 3.6v ? cmos power levels (0.4 w typ. static) ? rail-to-rail output swing for increased noise margin ? all inputs, outputs, and i/o are 5v tolerant ? supports hot insertion ? available in soic, ssop, qsop, and tssop packages functional block diagram applications: ? 5v and 3.3v mixed voltage systems ? data communication and telecommunication systems drive features: ? high output drivers: 24ma ? reduced system switching noise idt74lvc4245a description: the lvc4245a is manufactured using advanced dual metal cmos technology. this octal noninverting bus transceiver contains two separate supply rails; b port has v ccb , which is set at 3.3v, and a port has v cca , which is set at 5v. this allows for translation from a 3.3v to a 5v environment, and vice-versa. this device is ideal for asynchronous communication between two buses (a and b). the direction control pin (dir) controls the direction of data flow. the output enable pin ( oe ) overrides the direction control and disables both ports. all inputs are designed with hysteresis for improved noise margin. the lvc4245a has been designed with a 24ma output driver. this driver is capable of driving a moderate to heavy load while maintaining speed performance. cmos octal bus transceiver and 3.3v to 5v shifter with 3-state out- puts and 5 volt tolerant i/o dir a 1 a 2 a 3 a 4 a 5 a 6 a 7 a 8 b 8 b 7 b 6 b 5 b 4 b 3 b 2 b 1 oe 2 3 4 5 6 7 8 9 10 14 15 16 17 18 19 20 21 22 5 v p o r t 3 . 3 v p o r t
industrial temperature range 2 idt74lvc4245a cmos octal bus transceiver and 3.3v to 5v shifter pin configuration soic/ ssop/ qsop/ tssop top view pin names description oe output enable input (active low) dir direction control input a x port a inputs or 3-state outputs b x port b inputs or 3-state outputs pin description 2 3 1 a 1 20 19 18 b 4 b 3 b 5 b 1 b 2 15 b 7 b 8 16 9 gnd 10 a 8 b 6 23 22 24 21 17 dir 5 6 a 6 7 a 4 a 5 4 a 2 a 3 8 a 7 oe 13 14 11 gnd 12 v ccb (3.3v) v ccb (3.3v) gnd (5v) v cca note: 1. h = high voltage level l = low voltage level x = don?t care inputs oe dir outputs l l bus b data to bus a l h bus a data to bus b h x high z state function table (1) notes: 1. as applicable to the device type. 2. for a port only. 3. for b port only. symbol parameter (1) conditions typ. max. unit c in input capacitance v in = 0v or v cca 5?pf v cca = open c i/o i/o port capacitance (2) v out = v cca or gnd 11 ? pf v cca = 5v c i/o i/o port capacitance (3) v in = v ccb or gnd 11 ? pf v ccb = 3.3v capacitance (t a = +25c, f = 1.0mhz) absolute maximum ratings for v ccb or v ccb (1) symbol description max unit v term terminal voltage with respect to gnd ?0.5 to +6.5 v t stg storage temperature ?65 to +150 c i out dc output current ?50 to +50 ma i ik continuous clamp current, ?50 ma i ok v i < 0 or v o < 0 i cc continuous current through each 100 ma i ss v cc or gnd note: 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.
industrial temperature range idt74lvc4245a cmos octal bus transceiver and 3.3v to 5v shifter 3 symbol parameter test conditions min. typ. (2) max. unit v ih input high voltage level v cca = 4.5v to 5.5v 2 ? ? v v il input low voltage level v cca = 4.5v to 5.5v ? ? 0.8 v i ih input leakage current v cca = 5.5v v i = 0 to 5.5v ? ? 1a i il i ozh high impedance output current v cca = 5.5v v o = 0 to 5.5v ? ? 5a i ozl (3-state output pins) v h input hysteresis v cca = 5v ? 100 ? mv i ccl quiescent power supply current v cca = 5.5v v in = gnd or v cca ?? 80a i cch i ccz ? i cc quiescent power supply current one input at 3.4v, other inputs at v cca or gnd ? ? 1.5 ma variation v cca = 4.5v to 5.5v dc electrical characteristics over operating range (a port) following conditions apply unless otherwise specified: operating condition: t a = ?40c to +85c, v cca = 5v 0.5v (1) notes: 1. v ccb = 2.7v to 3.6v. 2. typical values are at v cca = 5v, +25c ambient. symbol parameter test conditions min. typ. (2) max. unit v ih input high voltage level v ccb = 2.7v to 3.6v 2 ? ? v v il input low voltage level v ccb = 2.7v to 3.6v ? ? 0.8 v i ozh high impedance output current v ccb = 3.6v v o = 0 to v ccb ?? 5a i ozl (3-state output pins) v h input hysteresis v ccb = 3.3v ? 100 ? mv i ccl quiescent power supply current v ccb = 3.6v v in = gnd or v ccb ?? 50a i cch i ccz ? i cc quiescent power supply current one input at v ccb - 0.6v, other inputs at v ccb or gnd ? ? 500 a variation v ccb = 2.7v to 3.6v dc electrical characteristics over operating range (b port) following conditions apply unless otherwise specified: operating condition: t a = ?40c to +85c, v ccb = 2.7v to 3.6v (1) notes: 1. v cca = 5v 0.5v. 2. typical values are at v ccb = 3.3v, +25c ambient.
industrial temperature range 4 idt74lvc4245a cmos octal bus transceiver and 3.3v to 5v shifter note: 1. v ih and v il must be within the min. or max. range shown in the dc electrical characteristics over operating range table for the appropriat e v cc range. t a = ? 40c to + 85c, v ccb = 2.7v to 3.6v. output drive characteristics, v cca = 5v 0.5v (a port) symbol parameter test conditions (1) min. max. unit v oh output high voltage v cca = 4.5v i oh = ? 0.1ma 4.3 ? v (b port to a port) v cca = 5.5v 5.3 ? v cca = 4.5v i oh = ? 24ma 3.7 ? v cca = 5.5v 4.7 ? v ol output low voltage v cca = 4.5v i ol = 0.1ma ? 0.2 v (b port to a port) v cca = 5.5v ? 0.2 v cca = 4.5v i ol = 24ma ? 0.55 v cca = 5.5v ? 0.55 note: 1. v ih and v il must be within the min. or max. range shown in the dc electrical characteristics over operating range table for the appropriat e v cc range. t a = ? 40c to + 85c, v cca = 5v 0.5v. output drive characteristics, v ccb = 2.7v to 3.6v (b port) symbol parameter test conditions (1) min. max. unit v oh output high voltage v ccb = 2.7v to 3.6v i oh = ? 0.1ma v cc ? 0.2 ? v (a port to b port) v ccb = 2.7v i oh = ? 12ma 2.2 ? v ccb = 3v 2.4 ? v ccb = 3v i oh = ? 24ma 2 ? v ol output low voltage v ccb = 2.7v to 3.6v i ol = 0.1ma ? 0.2 v (a port to b port) v ccb = 2.7v i ol = 12ma ? 0.4 v ccb = 3v i ol = 24ma ? 0.55 operating characteristics, t a = 25c v cca = 5v, v ccb = 3.3v symbol parameter test conditions typical unit c pd power dissipation capacitance per transceiver outputs enabled c l = 0pf, f = 10mhz 39.5 pf c pd power dissipation capacitance per transceiver outputs disabled 5
industrial temperature range idt74lvc4245a cmos octal bus transceiver and 3.3v to 5v shifter 5 switching characteristics (1) v cca = 5v 0.5v v ccb = 2.7v to 3.6v symbol parameter min. max. unit t plh propagation delay 1 6.3 ns t phl ax to bx 1 6.7 t plh propagation delay 1 6.1 ns t phl bx to ax 1 5 t pzl output enable time 1 8.8 ns t plz oe to bx 1 9.8 t pzl output enable time 1 9 ns t plz oe to ax 1 8.1 t plz output disable time 1 7.7 ns t phz oe to bx 1 7.8 t plz output disable time 1 7 ns t phz oe to ax 1 5.8 note: 1. see test circuits and waveforms. t a = ? 40c to + 85c.
industrial temperature range 6 idt74lvc4245a cmos octal bus transceiver and 3.3v to 5v shifter t plz t pzh t phz 0v v ol+ 0.3v v oh t pzl v ol v oh- 0.3v 1.5v 3v 0v 1.5v output control v cc output waveform 1 s1 at 2 x v cc (see note b) output waveform 2 s1 at gnd (see note b) 2 x v cc gnd open c l = 50pf (see note a) from output under test s1 500 ? 500 ? 1.5v v cc 0v 1.5v input t w 1.5v v cc 0v 1.5v input t phl t plh output v oh v ol 50% v cc 50% v cc 50% v cc 50% v cc load circuit and voltage waveforms parameter measurement information (a port) load circuit voltage waveforms pulse duration voltage waveforms propagation delay times noninverting outputs voltage waveforms enable and disable times low- and high-level enabling notes: a. c l includes probe and jig capacitance. b. waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. c . all input pulses are supplied by generators having the following characteristics: prr 10mhz; zo = 50 ? ; t f 2.5ns; t r 2.5ns. d. the outputs are measured one at a time with one transition per measurement. test conditions test s1 t plh / t phl open t plz / t pzl 2 x v cc t phz / t pzh gnd
industrial temperature range idt74lvc4245a cmos octal bus transceiver and 3.3v to 5v shifter 7 t plz t pzh t phz 0v v ol+ 0.3v v oh t pzl v ol v oh- 0.3v 1.5v 3v 0v 1.5v output control 3.5v output waveform 1 s1 at 7v (see note b) output waveform 2 s1 at gnd (see note b) 7v gnd open c l = 50pf (see note a) from output under test s1 500 ? 500 ? 1.5v 3v 0v 1.5v input t w 1.5v 3v 0v 1.5v input t phl t plh output v oh v ol 1.5v 1.5v 1.5v 1.5v load circuit voltage waveforms pulse duration voltage waveforms propagation delay times noninverting outputs voltage waveforms enable and disable times low- and high-level enabling load circuit and voltage waveforms parameter measurement information (b port) notes: a. c l includes probe and jig capacitance. b. waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. c . all input pulses are supplied by generators having the following characteristics: prr 10mhz; zo = 50 ? ; t f 2.5ns; t r 2.5ns. d. the outputs are measured one at a time with one transition per measurement. test conditions test s1 t plh / t phl open t plz / t pzl 7v t phz / t pzh gnd
industrial temperature range 8 idt74lvc4245a cmos octal bus transceiver and 3.3v to 5v shifter ordering information corporate headquarters for sales: for tech support: 2975 stender way 800-345-7015 or 408-727-6116 logichelp@idt.com santa clara, ca 95054 fax: 408-492-8674 (408) 654-6459 www.idt.com idt xx lvc xxxx xx package device type temp. range so py q pg 74 small outline ic (gull wing) shrink small outline package quarter size small outline package thin shrink small outline package ?40c to +85c x bus-hold 4245a no bus-hold blank octal bus transceiver and 3.3v to 5v shifter with 3-state outputs, 24ma
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