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december 2007 rev 2 1/17 17 st1g3234b 1-bit dual supply bus buffer level translator with a-side series resistor features high speed: t pd = 4.0 ns (max.) at t a =85c v ccb = 1.65 v; v cca = 3.0 v low power dissipation: i cca =i ccb =5 a (max.) at t a =85c symmetrical output impedance: |i oha |=i ola = 10 ma min at v cca = 2.75 v; v ccb = 1.4 to 3.6 v |i oha |=i ola = 6 ma min. at v cca = 2.3 v; v ccb = 1.4 to 3.6 v balanced propagation delays: t plh ? t phl power-down protection on inputs and outputs 26 series resistor on a-side outputs operating voltage range: ?v cca (opr.) = 1.4 to 3.6 v ?v ccb (opr.) = 1.4 to 3.6 v allows partial po wer-down when v cca =0, device consumes very low quiescent current max data rates: ? 380 mbps (1.8 to 3.3 v translation) ? 260 mbps (<1.8 to 3.3 v translation) ? 260 mbps (translates to 2.5 v) ? 210 mbps (translates to 1.5 v) latch-up performance exceeds 500 ma (jesd 17) esd performance: hbm > 2000 v (mil std 883 method 3015); mm > 200 v r o hs compliant to flip-chip package description the st1g3234b is a dual supply low voltage cmos 1-bit bus buffer level translator fabricated with sub-micron silicon gate and five-layer metal wiring c 2 mos technology. designed for use as an interface between a 3.3 v bus and a 2.5 v or 1.8 v bus in a mixed 3.3 v/1.8 v, 3.3 v/2.5 v, 1.8 v/1.4 v and 2.5 v/1.8 v supply systems, it achieves high speed operation while maintaining the cmos low power dissipation. the st1g3234b is intended for one-way asynchronous communication between data buses. the input and output power-down protections disable the device when both power supply are down, so that the buses are effectively isolated. the input tolerant buffers allow to translate v ccb compatible signals and greater signals than v ccb up/down to v cca . all inputs are equipped with protection circuits against static discharge, giving them esd immunity and transient excess voltage. the st1g3234b is v cca = 0 v tolerant, achieving very low current consumption when the v cca is grounded. flip-chip 5 www.st.com table 1. device summary order code package comments ST1G3234BBJR flip-chip 5 4000 parts per reel
contents st1g3234b 2/17 contents 1 pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
st1g3234b pin settings 3/17 1 pin settings 1.1 pin connection figure 1. pin connection (top through view) 1.2 pin description table 2. pin description pin number symbol name and function a1 a1 data output (v cca referred) c1 b1 data input (v ccb referred) b2 gnd ground (0v) a3 v cca positive supply voltage c3 v ccb positive supply voltage
device summary st1g3234b 4/17 2 device summary figure 2. input equivalent circuit figure 3. logic diagram table 3. truth table inputs b1 (v ccb referred) outputs a1 (v cca referred) ll hh esd protection overvolt. control gnd gnd gnd cs21760a r s = (26 ) a1 b1 v cca v cca v ccb b1 a1 st1g3234b cs21000a
st1g3234b maximum rating 5/17 3 maximum rating stressing the device above the rating listed in the ?absolute maximum ratings? table may cause permanent damage to the device. these are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not imp lied. exposure to absolute ma ximum rating conditions for extended periods may affect device reliability. refer also to the stmicroelectronics sure program and other relevant quality documents. table 4. absolute maximum ratings symbol parameter value unit v cca output supply voltage -0.5 to +4.6 v v ccb input supply voltage -0.5 to + 4.6 v v oa dc output voltage (power down mode: v cca =v ccb =gnd) -0.5 to +4.6 v v ib dc input voltage (power down mode: v cca =v ccb =gnd) -0.5 to +4.6 v v oa dc output voltage -0.5 to v cca + 0.5 v v ib dc input voltage -0.5 to + 4.6 v i ik dc input diode current ? 20 ma i ok dc output diode current ? 50 ma i oa dc output current 50 ma i cca dc v cca or ground current 100 ma i ccb dc v ccb or ground current 100 ma p d power dissipation 200 mw t stg storage temperature -65 to +150 c t l lead temperature (10 sec) 260 c
maximum rating st1g3234b 6/17 3.1 recommended operating conditions table 5. recommended operating conditions symbol parameter value unit v cca supply voltage 1.4 to 3.6 v v ccb supply voltage 1.4 to 3.6 v v ib input voltage (b1) 0 to v ccb v v oa output voltage (a1) 0 to v cca v t op operating temperature -40 to 85 c dt/dv input rise and fall time v ccb = 3.0 to 3.6 v 0 to 10 ns/v v ccb = 2.3 to 2.7 v 0 to 20 ns/v v ccb = 1.2 to 1.95 v 0 to 100 ns/v
st1g3234b electrical characteristics 7/17 4 electrical characteristics table 6. dc specification symbol parameter test condition value unit v ccb (v) (1) v cca (v) (1) t a = 25 c -40 to 85 c min max min max v ihb high level input voltage 1.4 1.4 to 3.6 0.65 v ccb 0.65 v ccb v 1.8 0.65 v ccb 0.65 v ccb 2.5 1.6 1.6 3.3 2.0 2.0 v ilb low level input voltage 1.4 1.4 to 3.6 0.35 v ccb 0.35 v cc b v 1.8 0.35 v ccb 0.35 v cc b 2.5 0.7 0.7 3.3 0.8 0.8 v oha high level output voltage 1.4 to 3.6 1.4 i o = -100 a1.2 1.2 v 2.75 i o =-10ma 2.2 2.2 2.3 i o =-6ma 1.8 1.8 1.65 i o =-2ma 1.4 1.4 1.4 i o =-1ma 1.1 1.1 v ola low level output voltage 1.4 to 3.6 1.4 i o = -100 a0.20 0.20 v 2.75 i o = 1 ma 0.40 0.40 2.75 i o =10ma 0.55 0.55 2.3 i o = 6 ma 0.40 0.40 1.65 i o = 2 ma 0.25 0.25 1.4 i o = 1 ma 0.20 0.20 i ib input leakage current 2.7 3.6 v ib =v ccb or gnd 0.5 5 a 1.4 2.7 v ib =3.6v or gnd 0.5 5 a i off power off leakage current 00 v ib = gnd to 3.6 v v oa = gnd to 3.6 v 1.0 10 a
electrical characteristics st1g3234b 8/17 i ccb quiescent supply current 1.4 to 3.6 1.4 to 3.6 v ib =v ccb or gnd 0.5 5 a 1.4 to 3.6 0 i cca quiescent supply current 1.4 to 3.6 1.4 to 3.6 v ib =v ccb or gnd 0.5 5 a 1. v cc range = 1.8 0.15 v; 2.5 0.2 v; 3.3 0.3 v table 7. ac electrical characteristics symbol parameter test condition value unit v ccb (v) v cca (v) -40 to 85 c min max t plh t phl propagation delay time b1 to a1 2.3 to 3.6 1.4 c l =10pf 2.0 5.0 ns 1.4 to 1.95 1.4 2.0 5.0 2.3 to 3.6 1.65 to 1.95 2.0 4.5 1.4 to 1.95 1.65 to 1.95 2.0 4.8 1.4 to 1.95 2.3 to 2.7 2.0 3.5 1.4 to 1.95 3.0 to 3.6 2.0 3.5 2.3 to 2.7 3.0 to 3.6 1.0 3.0 t plh t phl propagation delay time b1 to a1 2.3 to 3.6 1.4 c l =30pf r l = 500 2.0 5.5 ns 1.4 to 1.95 1.4 2.0 5.5 2.3 to 3.6 1.65 to 1.95 2.0 5.0 1.4 to 1.95 1.65 to 1.95 2.0 5.2 1.4 to 1.95 2.3 to 2.7 2.0 4.0 1.4 to 1.95 3.0 to 3.6 2.0 4.0 2.3 to 2.7 3.0 to 3.6 1.0 3.5 table 6. dc specification (continued) symbol parameter test condition value unit v ccb (v) (1) v cca (v) (1) t a = 25 c -40 to 85 c min max min max
st1g3234b electrical characteristics 9/17 note: 1 c pd is defined as the value of the device?s internal equivalent capacitance which is calculated from the operating current consumption without load. (refer to test circuit). average current can be obtained by the following equation: i cc(opr) = c pd x v cc x f in + i cc /4 (per circuit) table 8. capacitance characteristics symbol parameter test condition value unit v ccb (v) v cca (v) t a = 25 c -40 to 85 c min typ max min max c inb input capacitance open open 5 pf c o output capacitance 2.5 3.3 6 pf c pd power dissipation capacitance 2.5 3.3 f=10mhz 27 pf 1.8 3.3 27 1.4 2.5 23 1.4 1.8 20 3.3 1.8 27
test circuit st1g3234b 10/17 5 test circuit figure 4. test circuit c l = 10/30 pf or equivalent (includes jig and probe capacitance) r l = r 1 = 500 or equivalent r t = z out of pulse generator (typically 50 ) table 9. test circuit test switch t plh , t phl open c s 14 8 10a pulse generator d.u.t gnd open 6v or 2v cc r 1 r l c l v ccb v cca r t
st1g3234b waveforms 11/17 6 waveforms figure 5. waveform - propagation delay (f = 1 mhz; 50 % duty cycle) table 10. waveform symbol value symbol v cc 3.0 to 3.6 v 2.3 to 2.7 v 1.65 to 1.95 v v ih v cc v cc v cc v m 1.5 v v cc /2 v cc /2 a1 b1 a1 b1 90% v m 10% v m ov v ih t phl v oh v m 90% m 10% v v ol t phl 2.0ns 2.0ns cs21770a
package mechanical data st1g3234b 12/17 7 package mechanical data in order to meet environmental requirements, st offers these devices in ecopack ? packages. these packages have a lead-free second level interconnect . the category of second level interconnect is marked on the package and on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an st trademark. ecopack specifications are available at: www.st.com . figure 6. marking 8 vyww c s 2011 a b c 12 3 di s ting u i s hing fe a t u re m a rking 8 v y ww m a rking v a l u e ass y ye a r ass y week
st1g3234b package mechanical data 13/17 figure 7. flip-chip 5 package outline
package mechanical data st1g3234b 14/17 table 11. flip-chip 5 mechanical data symbol millimeters mils min typ max min typ max a 0.585 0.65 0.714 23.0 25.6 28.1 a1 0.21 0.25 0.29 8.3 9.8 11.4 a2 0.40 15.7 b 0.265 0.315 0.365 10.4 12.4 14.4 d 1.311.361.4151.653.555.5 d1 9.866 34.1 e 0.971.021.0738.240.242.1 e1 0.5 19.7 ed 0.383 0.433 0.483 15.1 17.0 19.0 ee 0.20 0.25 0.30 7.9 9.8 11.8 fd 0.247 9.7 fe 0.260 10.2 ccc 0.080 3.1
st1g3234b package mechanical data 15/17 figure 8. flip-chip 5 tape and reel information 1. drawing not to scale. table 12. flip-chip 5 tape and reel mechanical data symbol millimeters inches min typ max min typ max a 178 6.926 c 12.8 13.2 0.504 0.519 d 20.2 0.795 n 4950511.9291.9692.008 t12.40.488 ao 1.60 1.65 1.70 0.063 0.065 0.067 bo 1.27 1.32 1.37 0.050 0.052 0.054 ko 0.76 0.81 0.86 0.030 0.032 0.034 po 3.9 4 4.1 0.153 0.157 0.161 p 3.9 4 4.1 0.153 0.157 0.161
revision history st1g3234b 16/17 8 revision history table 13. document revision history date revision changes 1-aug-2007 1 initial release. 3-dec-2007 2 changed t pd value from 4.4 ns to 4.0 ns, removed footnote in ta bl e 5 : recommended operating conditions on page 6 , updated v ola value at v cca = 1.4 v, changed symbol names for quiescient supply current and minor text changes in table 6: dc specification on page 7 , removed v x and v y waveforms data in table 10: waveform symbol value on page 11 , replaced figure 6: marking on page 12 and enlarged figure 7: flip-chip 5 package outline on page 13 to improve readability.
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