1 IDT74CBTLV6800 low-voltage 10-bit bus switch with precharged outputs industrial temperature range 2 11 a1 a10 23 14 sw sw b1 b10 biasv 13 1 oe april 2001 2001 integrated device technology, inc. dsc-5739/- c IDT74CBTLV6800 industrial temperature range functional block diagram low-voltage 10-bit bus switch with precharged outputs description: the cbtlv6800 provides 10-bits of high-speed bus switching with low on-state resistance of the switch allowing connections to be made with minimal propagation delay. the device also precharges the b port to a user-selectable bias voltage (biasv) to minimize live-insertion noise. the cbtlv6800 is organized as a single 10-bit bus switch with a single output-enable ( oe ) input. when oe is low, the 10-bit bus switch is on and port a is connected to port b. when oe is high, the switch is open, and a high impedance state exists between the two ports, and port b is precharged to biasv through the equivalent of a 10-k w resistor. to ensure the high-impedance state during power up or power down, oe should be tied to v cc through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. oe a b simplified schematic, each switch features: - functionally equivalent to qs3800 - 5 w a/b bi-directional switch - isolation under power-off conditions - over-voltage tolerant - latch-up performance exceeds 100ma - v cc = 2.3v - 3.6v, normal range - esd > 2000v per mil-std-883, method 3015; > 200v using machine model (c = 200pf, r = 0) - available in ssop, qsop, and tssop packages applications: - 3.3v high speed bus switching and bus isolation the idt logo is a registered trademark of integrated device technology, inc.
2 industrial temperature range IDT74CBTLV6800 low-voltage 10-bit bus switch with precharged outputs pin configuration ssop/ qsop/ tssop top view v cc b 2 b 3 b 4 b 5 b 6 b 7 b 8 b 9 a 1 a 2 a 3 a 4 a 6 a 7 a 8 a 9 a 10 oe b 10 biasv a 5 gnd b 1 2 3 4 5 6 7 8 9 10 1 11 12 13 14 15 16 17 18 19 20 21 22 23 24 so24-7 so24-8 so24-9 absolute maximum ratings (1) symbol description max. unit v cc supply voltage range C0.5 to 4.6 v biasv bias voltage range, v i C0.5 to 4.6 v v i input voltage range C0.5 to 4.6 v continuous channel current 128 ma i ik input clamp current, , v i/o < 0 C50 ma t stg storage temperature C65 to +150 c 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. function table (1) input oe inputs/outputs l a port = b port h a port = z b port = biasv operating characteristics symbol parameter test conditions min. max. unit v cc supply voltage 2.3 3.6 v biasv bias voltage 1.3 v cc v v ih high-level control input voltage v cc = 2.3v to 2.7v 1.7 v v cc = 2.7v to 3.6v 2 v il low-level control input voltage v cc = 2.3v to 2.7v 0.7 v v cc = 2.7v to 3.6v 0.8 t a operating free-air temperature - 40 +85 c note: 1. all unused control inputs of the device must be held at v cc or gnd to ensure proper device operation.
3 IDT74CBTLV6800 low-voltage 10-bit bus switch with precharged outputs industrial temperature range dc electrical characteristics over operating range following conditions apply unless otherwise specified: operating condition: t a = C 40c to +85c symbol parameter test conditions min. typ. max. unit v ik control inputs, data i/o v cc = 3v, i i = - 18ma C 1.2 v i i control inputs, data i/o v cc = 3.6v, v i = v cc or gnd 1 m a i oz data i/o v cc = 3.6v, v o = 0v or 3.6v switch disabled 20 m a i off v cc = 0, v i or v o = 0 to 3.6v 50 m a |i o |v cc = 3v, biasv = 2.4v, v o = 0, oe = v cc 0.25 ma i cc v cc = 3.6v, i o = 0, v i = v cc or gnd 10 m a d i cc (1) control inputs v cc = 3.6v, one input at 3v , other inputs at v cc or gnd 300 m a c i control inputs v i = 3v or 0 4 pf c io(off) v o = 3v or 0, switch off, biasv = open, oe = v cc 7pf v cc = 2.3v v i = 0 i i = 64ma 5 8 typ at v cc = 2.5v i i = 24ma 5 8 r on (2) v i = 1.7v i i = 15ma 27 40 w v i = 0 i i = 64ma 5 7 v cc = 3v i i = 24ma 5 7 v i = 2.4v i i = 15ma 10 15 notes: 1. the increase in supply current is attributable to each input that is at the specified voltage level rather than v cc or gnd. 2. this is measured by the voltage drop between the a and b terminals at the indicated current through the switch. on-state r esistance is determined by the lower of the voltages of the two (a or b) terminals. switching characteristics v cc = 2.5v 0.2v v cc = 3.3v 0.3v symbol parameter min. max. min. max. unit t pd (1) propagation delay a to b or b to a 0.15 0.25 ns t pzh biasv = gnd oe to a or b 1 4.8 1 4.5 ns t pzl biasv = 3v oe to a or b 1 4.8 1 4.5 ns t phz biasv = gnd oe to a or b 1 5.6 1 5.5 ns t plz biasv = 3v oe to a or b 1 5.6 1 5.5 ns note: 1. the propagation delay is the calculated rc time constant of the typical on-state resistance of the switch and the specified load capacitance when driven by an ideal voltage source (zero output impededance).
4 industrial temperature range IDT74CBTLV6800 low-voltage 10-bit bus switch with precharged outputs open v load gnd v cc pulse generator d.u.t. 500 w 500 w c l r t v in v out (1, 2) same phase input transition opposite phase input transition 0v 0v v oh v ol t plh t phl t phl t plh output v ih v t v t v ih v t control input t plz 0v output normally low t pzh 0v switch closed output normally high enable disable switch open t phz 0v v ol + v lz v oh v t v t t pzl v load/2 v load/2 v ih v t v ol v oh - v hz test cir cuits and w a veforms propagation delay test circuits for all outputs enable and disable times definitions: c l = load capacitance: includes jig and probe capacitance. r t = termination resistance: should be equal to z out of the pulse generator. notes: 1. pulse generator for all pulses: rate 10mhz; t f 2.5ns; t r 2.5ns. 2. pulse generator for all pulses: rate 10mhz; t f 2ns; t r 2ns. switch position test switch t plz /t pzl v load t phz/ t pzh gnd t pd open note: 1. diagram shown for input control enable-low and input control disable-high. test conditions symbol v cc (1) = 3.3v 0.3v v cc (2) = 2.5v 0.2v unit v load 62 x vccv v ih 3vccv v t 1.5 v cc /2 v v lz 300 150 mv v hz 300 150 mv c l 50 30 pf
5 IDT74CBTLV6800 low-voltage 10-bit bus switch with precharged outputs industrial temperature range ordering information idt xx cbtlv xxx xx package device type temp. range py q pg 74 shrink small outline package (so20-7) quarter-size small outline package (so20-8) thin shrink small outline package (so20-9) low-voltage 10-bit bus switch with precharged outputs C40c to +85c 6800 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
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