1/9 september 2001 n 5v tolerant inputs and outputs n high speed : t pd = 5.2 ns (max.) at v cc = 3v n power down protection on inputs and outputs n symmetrical output impedance: |i oh | = i ol = 24ma (min) at v cc = 3v n pci bus levels guaranteed at 24 ma n balanced propagation delays: t plh @ t phl n operating voltage range: v cc (opr) = 2.0v to 3.6v (1.5v data retention) n pin and function compatible with 74 series 125 n latch-up performance exceeds 500ma (jesd 17) n esd performance: hbm > 2000v (mil std 883 method 3015); mm > 200v description the 74lcx125 is a low voltage cmos quad bus buffer fabricated with sub-micron silicon gate and double-layer metal wiring c 2 mos technology. it is ideal for low power and high speed 3.3v applications; it can be interfaced to 5v signal environment for both inputs and outputs. the device requires the 3-state control input g to be set high to place the output in to the high impedance state. it has same speed performance at 3.3v than 5v ac/act family, combined with a lower power consumption. all inputs and outputs are equipped with protection circuits against static discharge, giving them 2kv esd immunity and transient excess voltage. 74lcx125 low voltage cmos quad bus buffer (3-state) with 5v tolerant inputs and outputs pin connection and iec logic symbols order codes package tube t & r sop 74lcx125m 74lcx125mtr tssop 74LCX125TTR tssop sop
74lcx125 2/9 input and output equivalent circuit pin description truth table x : dont care z : high impedance absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditi ons is not implied 1) i o absolute maximum rating must be observed 2) v o < gnd pin no symbol name and function 1, 4, 10, 13 1g to 4g output enable input 2, 5, 9, 12 1a to 4a data inputs 3, 6, 8, 11 1y to 4y data outputs 7 gnd ground (0v) 14 v cc positive supply voltage ag y xhz lll hlh symbol parameter value unit v cc supply voltage -0.5 to +7.0 v v i dc input voltage -0.5 to +7.0 v v o dc output voltage (off state or high impedance) -0.5 to +7.0 v v o dc output voltage (high or low state) (note 1) -0.5 to v cc + 0.5 v i ik dc input diode current - 50 ma i ok dc output diode current (note 2) - 50 ma i o dc output current 50 ma i cc dc supply current per supply pin 100 ma i gnd dc ground current per supply pin 100 ma t stg storage temperature -65 to +150 c t l lead temperature (10 sec) 300 c
74lcx125 3/9 recommended operating conditions 1) truth table guaranteed: 1.5v to 3.6v 2) v in from 0.8v to 2v at v cc = 3.0v dc specifications symbol parameter value unit v cc supply voltage (note 1) 2.0 to 3.6 v v i input voltage 0 to 5.5 v v o output voltage (off state or high impedance) 0 to 5.5 v v o output voltage (high or low state) 0 to v cc v i oh , i ol high or low level output current (v cc = 3.0 to 3.6v) 24 ma i oh , i ol high or low level output current (v cc = 2.7v) 12 ma t op operating temperature -55 to 125 c dt/dv input rise and fall time (note 2) 0 to 10 ns/v symbol parameter test condition value unit v cc (v) -40 to 85 c -55 to 125 c min. max. min. max. v ih high level input voltage 2.7 to 3.6 2.0 2.0 v v il low level input voltage 0.8 0.8 v v oh high level output voltage 2.7 to 3.6 i o =-100 m av cc -0.2 v cc -0.2 v 2.7 i o =-12 ma 2.2 2.2 3.0 i o =-18 ma 2.4 2.4 i o =-24 ma 2.2 2.2 v ol low level output voltage 2.7 to 3.6 i o =100 m a 0.2 0.2 v 2.7 i o =12 ma 0.4 0.4 3.0 i o =16 ma 0.4 0.4 i o =24 ma 0.55 0.55 i i input leakage current 2.7 to 3.6 v i = 0 to 5.5v 5 5 m a i off power off leakage current 0 v i or v o = 5.5v 10 10 m a i oz high impedance output leakage current 2.7 to 3.6 v i = v ih or v il v o = 0 to v cc 5 5 m a i cc quiescent supply current 2.7 to 3.6 v i = v cc or gnd 10 10 m a v i or v o = 3.6 to 5.5v 10 10 d i cc i cc incr. per input 2.7 to 3.6 v ih = v cc - 0.6v 500 500 m a
74lcx125 4/9 dynamic switching characteristics 1) number of outputs defined as "n". measured with "n-1" outputs switching from high to low or low to high. the remaining outpu t is measured in the low state. ac electrical characteristics 1) skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch- ing in the same direction, either high or low (t oslh = | t plhm - t plhn |, t oshl = | t phlm - t phln |) 2) parameter guaranteed by design capacitive characteristics 1) c pd is defined as the value of the ics internal equivalent capacitance which is calculated from the operating current consumption without load. (refer to test circuit). average operating current can be obtained by the following equation. i cc(opr) = c pd x v cc x f in + i cc /4 (per gate) symbol parameter test condition value unit v cc (v) t a = 25 c min. typ. max. v olp dynamic low level quiet output (note 1) 3.3 c l = 50pf v il = 0v, v ih = 3.3v 0.8 v v olv -0.8 symbol parameter test condition value unit v cc (v) c l (pf) r l ( w ) t s = t r (ns) -40 to 85 c -55 to 125 c min. max. min. max. t plh t phl propagation delay time 2.7 50 500 2.5 6.0 6.9 ns 3.0 to 3.6 1.0 5.2 1.0 6.0 t pzl t pzh output enable time to high and low level 2.7 50 500 2.5 1.0 6.0 1.0 6.9 ns 3.0 to 3.6 1.0 5.0 1.0 6.0 t plz t phz output disable time to high and low level 2.7 50 500 2.5 1.0 6.0 1.0 6.9 ns 3.0 to 3.6 1.0 5.0 1.0 6.0 t oslh t oshl output to output skew time (note1, 2) 3.0 to 3.6 50 500 2.5 1.0 1.0 ns symbol parameter test condition value unit v cc (v) t a = 25 c min. typ. max. c in input capacitance 3.3 v in = 0 to v cc 5pf c out output capacitance 3.3 v in = 0 to v cc 10 pf c pd power dissipation capacitance (note 1) 3.3 f in = 10mhz v in = 0 or v cc 37 pf
74lcx125 5/9 test circuit c l = 50 pf or equivalent (includes jig and probe capacitance) r l = r1 = 500 w or equivalent r t = z out of pulse generator (typically 50 w ) waveform 1 : propagation delay (f=1mhz; 50% duty cycle) test switch t plh , t phl open t pzl , t plz 6v t pzh , t phz gnd
74lcx125 6/9 waveform 2 : output enable and disable time (f=1mhz; 50% duty cycle)
74lcx125 7/9 dim. mm. inch min. typ max. min. typ. max. a 1.75 0.068 a1 0.1 0.2 0.003 0.007 a2 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 c 0.5 0.019 c1 45 (typ.) d 8.55 8.75 0.336 0.344 e 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 7.62 0.300 f 3.8 4.0 0.149 0.157 g 4.6 5.3 0.181 0.208 l 0.5 1.27 0.019 0.050 m 0.68 0.026 s8 (max.) so-14 mechanical data po13g
74lcx125 8/9 dim. mm. inch min. typ max. min. typ. max. a 1.2 0.047 a1 0.05 0.15 0.002 0.004 0.006 a2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 d 4.9 5 5.1 0.193 0.197 0.201 e 6.2 6.4 6.6 0.244 0.252 0.260 e1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 bsc 0.0256 bsc k0 80 8 l 0.45 0.60 0.75 0.018 0.024 0.030 tssop14 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 0080337d
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