ST 74LCX138 handbook
Contents
1. Z X Do not care Logic diagram Figure 4 Logic diagram SELECT INPUTS ENABLE INPUTS 62A 7 61 p 5 4928 OUTPUTS This logic diagram has not to be used to estimate propagation delays 5 17 Maximum rating 741 138 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 implied exposure to absolute maximum rating conditions for extended periods may affect device reliability refer also to the STMicroelectronics sure program and other relevant quality documents Table 3 Absolute maximum ratings Symbol Parameter Value Unit Vcc Supply voltage 0 5 to 7 0 V Vi DC input voltage 0 5 to 47 0 V Vo DC output voltage Vog OV 0 5 to 47 0 V Vo DC output voltage high or low state 7 0 5 to Vcc 0 5 V lik DC input diode current 50 lok DC output diode current 2 50 mA lo DC output current 50 loc DC supply current per supply pin 100 mA DC ground current per supply pin 100 Storage temperatur2. 74LCX138 Low voltage CMOS 3 to 8 line decoder Inverter with 5V tolerant inputs Features 5V tolerant inputs High speed tpp 6 7ns Max at Voc Power down protection on inputs and outputs Symmetrical output impedance lo 24mA Min at Vog 3V m PCI bus levels guaranteed at 24mA Balanced propagation delays m Operating voltage range Voc Opr 2 0V to 3 6V m function compatible with 74 series 138 m Latch up performance exceeds 500mA JESD 17 m ESD performance HBM gt 2000V MIL STD 883 method 3015 MM 200V Order codes TSSOP16 Description The 74LCX138 is a low voltage CMOS 3 to 8 line decoder inverting fabricated with sub micron silicon gate and double layer metal wiring 2 technology It is ideal for low power and high speed 3 3V applications it can be interfaced to 5V signal environment for inputs If the device is enabled 3 binary select inputs A B and C determine which one of the outputs will go low If enable input G1 is held low or either 2 or G2B is held high the decoding function is inhibited and all the 8 outputs go to high Three enable inputs are provided to ease cascade connection and application of address decoders for memory systems It has same speed performance at 3 3V than 5V AC ACT family combined with a lower power consumption All inputs and outputs are equi
3. mm inch DIM MIN TYP MAX MIN 330 12 992 12 8 13 2 0 504 0 519 D 20 2 0 795 N 60 2 362 T 22 4 0 882 Ao 6 45 6 65 0 254 0 262 Bo 10 3 10 5 0 406 0 414 Ko 2 1 2 8 0 082 0 090 Po 3 9 4 1 0 153 0 161 P 7 9 8 1 0 311 0 319 Y N D 4 A 9 Lt 1 6 0 7 E Note Drawing not in scale 3 14 17 74LCX138 Package mechanical data Tape amp Reel TSSOP16 MECHANICAL DATA P 7 9 8 1 0 311 0 319 N D 1 d 1 EE P T Po Bo I LO q 1 a P Note Drawing not in scale 15 17 Revision history 741 138 8 16 17 Revision history Table 9 Revision history Date Revision Changes 15 Sep 2004 4 Ordering Codes Revision pag 1 26 Jul 2006 5 New template temperature ranges updated 741 138 Please Read Carefully Information in this document is provided solely in connection with ST products STMicroelectronics NV and its subsidiaries ST reserve the right to make changes corrections modifications or improvements to this document and the products and services described herein at any time without notice Al
4. E OR MALFUNCTION MAY RESULT IN PERSONAL INJURY DEATH OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ST PRODUCTS WHICH ARE NOT SPECIFIED AS AUTOMOTIVE GRADE MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER S OWN RISK Resale of ST products with provisions different from the statements and or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever any liability of ST ST and the ST logo are trademarks or registered trademarks of ST in various countries Information in this document supersedes and replaces all information previously supplied The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners 2006 STMicroelectronics rights reserved STMicroelectronics group of companies Australia Belgium Brazil Canada China Czech Republic Finland France Germany Hong Kong India Israel Italy Japan Malaysia Malta Morocco Singapore Spain Sweden Switzerland United Kingdom United States of America www st com 17 17
5. c incr per Input 2 7103 6 Vcc 0 6V 500 HA Table 6 Dynamic switching characteristics Test condition Value Symbol Parameter Vcc 25 Unit V Min Typ Max VolP Dynamic low level quiet C 50pF 0 8 Voy _ output D on Vit OV 3 3V 08 Y 1 Number of outputs defined as n Measured with n 1 outputs switching from HIGH to LOW or LOW to HIGH The remaining output is measured in the LOW state 7 17 Electrical characteristics 74LCX138 Table 7 AC electrical characteristics Test condition Value Symbol Parameter Vcc RL ts t 40 to 85 C Unit V pF 9 ns Min Max i 2 7 7 9 ipi peu Propagationdelay 50 500 2 5 ns time 3 0to 3 6 15 67 Output enable 2 7 6 4 tpz time to HIGH and 50 500 2 5 ns LOW level 3 0 to 3 6 1 5 5 8 Output disable 2 7 7 4 tpLz tpuz time to HIGH and 50 500 2 5 ns LOW level 3 0 to 3 6 1 5 6 5 t Output to output iol Pr qa 901036 50 500 2 5 10 ns tosHL skew time 1 Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switching the same direction either HIGH or LOW tosLH tpi tPLHnl tosHL tpHim tpHLnl 2 Parameter guaranteed by design Table 8 Capacitive characteristics Test condit
6. cuit 2 1 OVERVOLT CONTROL INPUT OUTPUT ESD He ESD PROTEC PROTEC GND GND GND GND GND 5008871 3 17 Pin settings 74LCX138 2 Pin settings 2 1 Pin connection Figure 3 Pin connection top through view 2 2 Pin description Table 1 Pin description Pin N Symbol Name and function 1 2 3 Address inputs 4 5 G2A G2B Enable inputs 6 G1 Enable input 15 14 13 12 11 10 9 7 YO to Y7 Outputs 8 GND Ground 0 16 Voc Positive supply voltage 4 17 741 138 Pin settings 2 3 Note 2 4 Note ky Truth table Table 2 Truth table Inputs Enable Select Outputs N G2A 2 lt lt lt N lt lt lt lt lt gt xX zm xo Lo Lo LT IT KI Ke r T x I r I r x gt 3E SE SE UE p 0 S I IT ry oy cy Dyer cy rt rt Lyf zk T Z ey Z Lye Ly ay r mm x E i cy tl T TI r T T T T T Lr tr L r cy cy T T T T T T
7. e 65 to 150 C T Lead temperature 10 sec 300 C 1 lg absolute maximum rating must be observed 2 Vo lt GND 3 1 Recommended operating conditions Table 4 Recommended operating conditions Symbol Parameter Value Unit Vcc Supply voltage 7 2 0 to 3 6 V VI Input voltage 0 to 5 5 V Vo Output voltage Vcc OV 0 to 5 5 V Vo Output voltage high or low state 0 to Vcc V lor High or low level output current Vog 3 0 to 3 6V 24 High or low level output current Vog 2 7V 12 Operating temperature 40 to 85 C dUdv Input rise and fall time 2 Oto 10 ns V 1 Truth table guaranteed 1 5V to 3 6V 2 Vin from 0 8V to 2V at Vog 3 0V 6 17 ky 74LCX138 Electrical characteristics 4 Electrical characteristics Table 5 DC specifications Test condition Value Symbol Parameter Vec 40 to 85 C Unit V Min Max High level input voltage 2 0 2 7 to 3 6 Vy Low level input voltage 0 8 V 2 710 3 6 lo 100 0 2 2 7 Io 12 mA 2 2 High level output voltage V lo 18 mA 24 3 0 lo 24 mA 2 2 2 7 to 3 6 197100 pA 0 2 2 7 12 mA 0 4 VoL Low level output voltage V lo 16 mA 0 4 3 0 24 mA 0 55 li Input leakage current 2 7 to 3 6 Vi 0 to 5 5V 5 Power OFF leakage V or Vo 5 5V oH current 9 ds 10 pA Vi or GND 10 loc Quiescent supply current 2 7 to 3 6 uA Vi or Vo 3 6 to 5 5V 10 Alc
8. ed 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 ky 11 17 Package mechanical data 74LCX138 SO 16 MECHANICAL DATA mm inch ove MIN TYP MAX MIN TYP MAX A 1 75 0 068 al 0 1 0 25 0 004 0 010 a2 1 64 0 063 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 9 8 10 0 385 0 393 5 8 6 2 0 228 0 244 e 1 27 0 050 e3 8 89 0 350 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 62 0 024 S 8 max 0016020D 12 17 ky 74LCX138 Package mechanical data TSSOP16 MECHANICAL DATA mm inch DIM MIN TYP MAX MIN 1 2 0 047 1 0 05 0 15 0 002 0 004 0 006 2 0 8 1 1 05 0 031 0 039 0 041 b 0 19 0 30 0 007 0 012 0 09 0 20 0 004 0 0079 D 4 9 5 53 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 0 65 BSC 0 0256 BSC K 0 8 0 8 L 0 45 0 60 0 75 0 018 0 024 0 030 PIN 1 IDENTIFICATION 0080338D 13 17 Package mechanical data 74LCX138 Tape amp Reel SO 16 MECHANICAL DATA
9. ion Value Symbol Parameter Vcc Ta 25 C Unit V Min Typ Max Cin Input capacitance 3 3 Vin Oto Voc 6 pF Power dissipation fin 10 2 3 3 42 F capacitance Vin 0 or Vec 1 Cpp defined as the value of the 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 X Vcc X fin Icc 8 17 741 138 Test circuit 5 Test circuit Figure 5 Test circuit PULSE GENERATOR RL 5 08650 50pF or equivalent includes jig and probe capacitance R 5000 or equivalent Rr Zour of pulse generator typically 500 9 17 741 138 Waveforms 6 Waveforms Figure 6 Propagation delay for inverting outputs f 1MHz 50 duty cycle 2 5ns 2 5ns 2 7 GND Von VoL SC13510 10 17 Figure 7 Propagation delay for non inverting outputs f 1MHz 50 duty cycle 2 5ns 2 5ns 2 7 G2A G2B GND Von Yn VoL C13520 74LCX138 Package mechanical data 7 Package mechanical data In order to meet environmental requirements ST offers these devices in ECOPACK amp packages These packages have a Lead free second level interconnect The category of second level interconnect is mark
10. l ST products are sold pursuant to ST s terms and conditions of sale Purchasers are solely responsible for the choice selection and use of the ST products and services described herein and ST assumes no liability whatsoever relating to the choice selection or use of the ST products and services described herein No license express or implied by estoppel or otherwise to any intellectual property rights is granted under this document If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein UNLESS OTHERWISE SET FORTH IN ST S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE ST PRODUCTS ARE NOT RECOMMENDED AUTHORIZED OR WARRANTED FOR USE IN MILITARY AIR CRAFT SPACE LIFE SAVING OR LIFE SUSTAINING APPLICATIONS NOR IN PRODUCTS OR SYSTEMS WHERE FAILUR
11. pped with protection circuits against static discharge giving them 2KV ESD immunity and transient excess voltage Part number Package Packaging 74LCX138MTR SO 16 Tape and reel 74LCX138TTR TSSOP16 Tape and reel July 2006 Rev 5 1 17 www st com Contents 74LCX138 Contents 1 Logic symbols and I O equivalent circuit 3 2 RR RE d i 4 2 1 Pin connection 4 2 2 Pin description 4 2 3 Truth table 2 ARLERI RENAE 5 2 4 Logic diagrami rr 5 3 Maximum Fi d mcn nun t RON Cnr nn a 6 3 1 Recommended operating conditions 6 4 Electrical characteristics 7 5 Test eIICUIE ux ed rece RERO QU d RON 9 6 Waveforms uec TIT xe ERE ER 10 7 Package mechanical data 11 8 REVISION history cee o RR RCRCRCE RCA CR I B aca ed 16 2 17 ky 74LCX138 Logic symbols and I O equivalent circuit 1 Logic symbols and I O equivalent circuit Figure 1 IEC logic symbols 0 1 2 3 m 4 5 G2B 6 G1 7 LC11461 Figure 2 Input and output equivalent cir
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ST 74LCX138 handbook