74LVXC164245

74LVXC164245 16-Bit Dual Supply Configurable Voltage Interface Transceiver with TRI-STATE Outputs ADVANCE INFORMATION March 1996 74LVXC164245 16-Bit Dual Supply Configurable Voltage Interface Transceiver with TRI-STATE Outputs General Description The LVXC164245 is a 48-pin dual-supply 16-bit configurable voltage interface transceiver suited for PCMCIA and other real time configurable I O applications The VCCB pin accepts a 5V supply level The ‘‘B’’ port is a dedicated 5V port The VCCA pin accepts a 3V-to-5V supply level The ‘‘A’’ port is configured to track the VCCA supply level respectively A 5V level on the VCC pin will configure the I O pins at a 5V level and a 3V VCC will configure the I O pins at a 3V level This device will allow the VCCA voltage source pin and I O pins on the ‘‘A’’ port to float when OE is HIGH This feature is necessary to buffer data to and from a PCMCIA socket that permits PCMCIA cards to be inserted and removed during normal operation Features Y Y Y Y Y Y Y Y Y Y Power up down high impedance provides glitch-free bus loading Allows A port and VCCA to float simultaneously when OE is HIGH Bidirectional interface between 5V and 3V-to-5V buses Inputs compatible with TTL level Allow dual VCC supplies power up down easily when OE is HIGH Guaranteed simultaneous switching noise level and dynamic threshold performance Available in SSOP and TSSOP packages Implements patented Quiet SeriesTM EMI reduction circuitry Flexible VCCA operating range Functionally compatible with the 74 series 16245 Logic Symbol Connection Diagram Pin Assignment for SSOP and TSSOP TL F 12535 – 1 Pin Names OEn T Rn A0 – A15 B0 – B15 Description Output Enable Input (Active Low) Transmit Receive Input Side A Inputs TRI-STATE Outputs Side B Inputs TRI-STATE Outputs SSOP TSSOP JEDEC 74LVXC164245MTD 74LVXC164245MTDX MTD48 Order Number See NS Package Number 74LVXC164245MEA 74LVXC164245MEAX MS48A TL F 12535 – 2 C1996 National Semiconductor Corporation TL F 12535 RRD-B30M17 Printed in U S A http www national com Functional Description The LVXC164245 contains sixteen non-inverting bidirectional buffers with TRI-STATE outputs The device is byte controlled with each byte functioning identically but independent of the other The control pins can be shorted together to obtain full 16-bit operation Truth Tables Inputs OE1 L L H T R1 L H X Bus B0 – B7 Data to Bus A0 – A7 Bus A0 – A7 Data to Bus B0 – B7 HIGH-Z State on A0 – A7 B0 – B7 L e Low Voltage Level Outputs L L H Inputs OE2 T R2 L H X Outputs Bus B8 –B15 Data to Bus A8 –A15 Bus A8 –A15 Data to Bus B8 –B15 HIGH-Z State on A8 –A15 B8 –B15 Z e High Impedance H e High Voltage Level X e Immaterial Logic Diagrams TL F 12535–3 TL F 12535 – 4 Please note that these diagrams are provided only for the understanding of logic operations and should not be used to estimate propagation delays http www national com 2 Physical Dimensions inches (millimeters) unless otherwise noted 48-Lead Molded Shrink Small Outline Package EIAJ Order Number 74LVXC164245MEA or 74LVXC164245MEAX NS Package Number MS48A 3 http www national com 74LVXC164245 16-Bit Dual Supply Configurable Voltage Interface Transceiver with TRI-STATE Outputs Physical Dimensions millimeters (Continued) 48-Lead Molded Thin Shrink Small Outline Package JEDEC 6 1 mm Body Width Order Number 74LVXC164245MTD or 74LVXC164245MTDX NS Package Number MTD48 LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or systems which (a) are intended for surgical implant into the body or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user National Semiconductor Corporation Americas Tel 1(800) 272-9959 Fax 1(800) 737-7018 Email support nsc com 2 A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness http www national com National Semiconductor Europe Fax a49 (0) 180-530 85 86 Email europe support nsc com Deutsch Tel a49 (0) 180-530 85 85 English Tel a49 (0) 180-532 78 32 Fran ais Tel a49 (0) 180-532 93 58 Italiano Tel a49 (0) 180-534 16 80 National Semiconductor Southeast Asia Fax (852) 2376 3901 Email sea support nsc com National Semiconductor Japan Ltd Tel 81-3-5620-7561 Fax 81-3-5620-6179 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications