October 1995 74HC245 74HCT245 Octal Bidirectional Traceiver with TRI-STATE Outputs General Description The HC HCT245 is an advanced high speed CMOS octal bus traceiver fabricated with silicon gate CMOS technology It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation The HC245 is intended for bidirectional asynchronous communication between data busses The direction of data tramission is determined by the level of the T R input The enable input can be used to disable the device so that the busses are effectively isolated All inputs are equipped with protection circuits agait static discharge Commercial Package Number Features High Noise Immunity HC NIH e NIL e 28% CC (Min) HCT IH e 2 0 IL e 0 8 Power Down Protection HC Inputs Only HCT Inputs and Outputs Low Noise HC OLP e 0 9 (typ) HCT OLP e 1 1 (typ) Low Power Dissipation I CC e 4 ma (Max) T a e 25 C Balanced Propagation Delays tplh j t phl Pin and Function Compatible with 74HC HCT245 Package Description 74HC245M M20B 20 Lead Molded JEDEC SOIC 74HC245SJ M20D 20 Lead Molded EIAJ SOIC 74HC245MSC MSC20 20 Lead Molded EIAJ Type 1 SSOP 74HC245MTC MTC20 20 Lead Molded JEDEC Type 1 TSSOP 74HC245N N20A 20 Lead Molded DIP 74HCT245M M20B 20 Lead Molded JEDEC SOIC 74HCT245SJ M20D 20 Lead Molded EIAJ SOIC 74HCT245MTC MTC20 20 Lead Molded JEDEC Type 1 TSSOP 74HCT245N N20A 20 Lead Molded DIP 74HC245 74HCT245 Octal Bidirectional Traceiver with TRI-STATE Outputs Note Surface mount packages are also available on Tape and Reel Specify by appending the suffix letter X to the ordering code EIAJ Type 1 SSOP available on Tape and Reel only order MSCX Logic IEEE IEC Connection Diagram Pin Assignment for DIP SSOP TSSOP and SOIC Pin Names OE T R A 0 A 7 B 0 B 7 Pin Description Description Output Enable Input Tramit Receive Input Side A Inputs or TRI-STATE Outputs Side B Inputs or TRI-STATE Outputs TL F 11520 2 TRI-STATE is a registered trademark of National Semiconductor Corporation TL F 11520 3 Truth Table OE Inputs T R Outputs L L Bus B Data to Bus A L H Bus A Data to Bus B H X HIGH-Z State H e HIGH oltage Level X e Immaterial L e LOW oltage Level C1995 National Semiconductor Corporation TL F 11520 RRD-B30M125 Printed in U S A
Absolute Maximum Ratings (Note 1) Supply oltage ( CC ) DC Input oltage ( IN ) (T R OE) DC Output oltage ( OUT ) HC HCT Input Diode Current (I IK ) (T R OE) Output Diode Current (I OK ) (HC) (HCT) DC Output Current (I OUT ) DC CC GND Current (I CC ) Storage Temperature (T STG ) Lead Temperature (T L ) (Soldering 10 seconds) OUT l CC only if output is in H or Z state b0 5 to a7 0 b0 5 to 7 0 b0 5 to CC a 0 5 b0 5 to 7 0 b20 ma g20 ma b20 ma g25 ma g75 ma b65 Ctoa150 C 260 C DC Characteristics for HC Family Devices CC () 74HC Note 1 Absolute Maximum Ratings are values beyond which the device may be damaged or have its useful life impaired The databook specificatio should be met without exception to eure that the system design is reliable over its power supply temperature and output input loading variables National does not recommend operation outside databook specificatio Recommended Operating Conditio Supply oltage ( CC ) HC 2 0 to 5 5 HCT 4 5 to 5 5 Input oltage ( IN )(T R OE) 0 to 5 5 Output oltage ( OUT ) 0to CC Operating Temperature (T OPR ) 74 HC HCT b40 Ctoa85 C Input Rise and Fall Time (t r t f ) CC e 3 3 g0 3 (HC only) 0 E 100 CC e 5 0 g0 5 0 E 20 74HC T T A e 25 C A eb40 C to a85 C Min Typ Max Min Max IH High Level Input oltage 2 0 1 50 1 50 3 0 5 5 0 7 CC 0 7 CC IL Low Level Input oltage 2 0 0 50 0 50 3 0 5 5 0 3 CC 0 3 CC Units Conditio OH High Level Output 2 0 1 9 2 0 1 9 IN e IH I OH eb50 ma oltage 3 0 2 9 3 0 2 9 or IL 4 5 4 4 4 5 4 4 4 5 2 58 2 48 I OH eb4ma 4 5 3 94 3 80 I OH eb8ma OL Low Level Output 2 0 0 0 0 1 0 1 IN e IH I OL e 50 ma oltage 3 0 0 0 0 1 0 1 or IL 4 5 0 0 0 1 0 1 3 0 0 36 0 44 I OL e 4mA 4 5 0 36 0 44 I OL e 8mA I OZ TRI-STATE Output Off- IN e CC or GND State Current 5 5 g0 25 g2 5 ma OUT e CC or GND IN OE e IH or IL I IN Input Leakage Current (T R OE) 0 5 5 g0 1 g1 0 ma IN e 5 5 or GND I CC Quiescent Supply Current 5 5 4 0 40 0 ma IN e CC or GND 2
DC Characteristics for HC Family Devices 74HC CC T A e 25 C Units Conditio () Typ Limits OLP Quiet Output Maximum Dynamic OL 5 0 0 9 1 2 OL Quiet Output Minimum Dynamic OL 5 0 b0 9 b1 2 IHD Minimum High Level Dynamic Input oltage 5 0 3 5 ILD Maximum Low Level Dynamic Input oltage 5 0 1 5 guaranteed by design DC Characteristics for HCT Family Devices CC () 74HCT T A e 25 C 74HCT T A eb40 C to a85 C Min Typ Max Min Max IH High Level 4 5 2 0 2 0 Input oltage 5 5 2 0 2 0 IL Low Level 4 5 0 8 0 8 Input oltage 5 5 0 8 0 8 Units Conditio OH High Level 4 5 3 15 3 65 3 15 IN e IH I OH eb50 ma Output oltage 4 5 2 5 2 4 or IL IOH eb8ma OL Low Level 4 5 0 0 0 1 0 1 IN e IH I OL e 50 ma Output oltage 4 5 0 36 0 44 or IL IOL e 8mA I OZ TRI-STATE Output IN e CC or GND Off-State Current 5 5 g0 25 g2 5 ma OUT e CC or GND IN OE e IH or IL I IN Input Leakage (T R OE) Current 0 5 5 g0 1 g1 0 ma IN e 5 5 or GND I CC Quiescent Supply Current 5 5 4 0 40 0 ma IN e CC or GND I CCT Maximum I CC Input IN e 3 4 5 5 1 35 1 50 ma Other Inputs e CC or GND I OPD Output Leakage Current (Power 0 0 a0 5 a5 0 ma OUT e 5 5 Down State) 3
DC Characteristics for HCT Family Devices OLP Quiet Output Maximum Dynamic OL 74HCT CC T A e 25 C Units Conditio () Typ Limits 1 1 1 6 OL Quiet Output Minimum b1 1 b1 6 Dynamic OL IHD Minimum High Level 2 0 Dynamic Input oltage ILD Maximum Low Level 0 8 Dynamic Input oltage guaranteed by design AC Electrical Characteristics for HC Family Devices CC () 74HC T A e 25 C 74HC T A eb40 C to a85 C Min Typ Max Min Max Units Conditio t PLH Propagation Delay Time 3 3 g 0 3 5 8 8 4 1 0 10 0 C L e 15 pf t PHL 8 3 11 9 1 0 13 5 CL e 50 pf 5 0 g 0 5 4 0 5 5 1 0 6 5 C L e 15 pf 5 5 7 5 1 0 8 5 t PZL TRI-STATE Output Enable 3 3 g 0 3 8 5 13 2 1 0 15 5 R L e 1kX C L e15 pf t PZH Time 11 0 16 7 1 0 19 0 CL e 50 pf 5 0 g 0 5 5 8 8 5 1 0 10 0 C L e 15 pf 7 3 10 6 1 0 12 0 t PLZ TRI-STATE Output 3 3 g 0 3 11 5 15 8 1 0 18 0 R L e 1kX C L e50 pf t PHZ Disable Time 5 0 g 0 5 7 0 9 7 1 0 11 0 t OSLH Output to Output Skew 3 3 g 0 3 1 5 1 5 (Note 1) t OSHL 5 0 g 0 5 1 0 1 0 CL e 50 pf C IN (T R OE) Input Capacitance 4 10 10 pf CC e Open C I O Output Capacitance 8 pf CC e 5 0 C PD Power Dissipation Capacitance 21 pf (Note 2) Note 1 guaranteed by design t OSLH e lt PLH max b t PLH minl t OSHL e lt PHL max b t PHL minl Note 2 C PD is defined as the value of the internal equivalent capacitance which is calculated from the operating current coumption without load Average operating current can be obtained by the equation I CC (opr ) e C PD CC f IN a I CC 8 (per Bit) 4
AC Electrical Characteristics for HCT Family Devices CC () 74HCT T A e 25 C 74HCT T A eb40 C to a85 C Min Typ Max Min Max Units Conditio t PLH Propagation Delay Time 5 0 g0 5 4 5 7 7 1 0 8 5 C L e 15 pf t PHL 5 3 8 7 1 0 9 5 CL e 50 pf t PZL TRI-STATE Output Enable 5 0 g0 5 8 9 13 8 1 0 15 0 R L e 1kX C L e15 pf t PZH Time 9 7 14 8 1 0 16 0 CL e 50 pf t PLZ TRI-STATE Output 5 0 g0 5 t PHZ Disable Time 10 0 15 4 1 0 16 5 R L e 1kX C L e50 pf t OSLH Output to Output Skew 5 0 g0 5 (Note 1) 1 0 1 0 t OSHL C IN Input Capacitance 4 10 10 pf CC e Open C I O Output Capacitance 9 pf CC e 5 0 C PD Power Dissipation Capacitance 23 pf (Note 2) Note 1 guaranteed by design t OSLH e lt PLH max b t PLH minl t OSHL e lt PHL max b t PHL minl Note 2 C PD is defined as the value of the internal equivalent capacitance which is calculated from the operating current coumption without load Average operating current can be obtained by the equation I CC (opr ) e C PD CC f IN a I CC 8 (per Bit) 5
Ordering Information The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows TL F 11520 5 6
Physical Dimeio inches (millimeters) 20-Lead Small Outline Integrated Circuit JEDEC SOIC (M) Order Number 74HC245M 74HC245MX 74HCT245M or 74HCT245MX NS Package Number M20B 20-Lead Small Outline Package EIAJ SOIC (SJ) Order Number 74HC245SJ 74HC245SJX 74HCT245SJ or 74HCT245SJX NS Package Number M20D 7
Physical Dimeio millimeters (Continued) 20-Lead Plastic EIAJ SSOP Type I (MSC) Order Number 74HC245MSCX NS Package Number MSC20 8
Physical Dimeio millimeters (Continued) 20-Lead Plastic JEDEC TSSOP Type I (MTC) Order Number 74HC245MTC 74HC245MTCX 74HCT245MTC or 74HCT245MTCX NS Package Number MTC20 9
74HC245 74HCT245 Octal Bidirectional Traceiver with TRI-STATE Outputs Physical Dimeio inches (millimeters) (Continued) 20-Lead (0 300 Wide) Molded Dual-In-Line Package Order Number 74HCT245N NS Package Number N20A LIFE SUPPORT POLIC NATIONAL S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEICES OR SSTEMS WITHOUT THE EXPRESS WRITTEN APPROAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or 2 A critical component is any component of a life systems which (a) are intended for surgical implant support device or system whose failure to perform can into the body or (b) support or sustain life and whose be reasonably expected to cause the failure of the life failure to perform when properly used in accordance support device or system or to affect its safety or with itructio for use provided in the labeling can effectiveness be reasonably expected to result in a significant injury to the user National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd Japan Ltd 1111 West Bardin Road Fax (a49) 0-180-530 85 86 13th Floor Straight Block Tel 81-043-299-2309 Arlington TX 76017 Email cnjwge tevm2 c com Ocean Centre 5 Canton Rd Fax 81-043-299-2408 Tel 1(800) 272-9959 Deutsch Tel (a49) 0-180-530 85 85 Tsimshatsui Kowloon Fax 1(800) 737-7018 English Tel (a49) 0-180-532 78 32 Hong Kong Fran ais Tel (a49) 0-180-532 93 58 Tel (852) 2737-1600 Italiano Tel (a49) 0-180-534 16 80 Fax (852) 2736-9960 National does not assume any respoibility for use of any circuitry described no circuit patent licees are implied and National reserves the right at any time without notice to change said circuitry and specificatio