74LCX646 ,Low Voltage Octal Transceiver/Register with 5V Tolerant Inputs and Outputsapplications with capability of interfacing to a 5V signal
74LCX646
Low Voltage Octal Transceiver/Register with 5V Tolerant Inputs and Outputs
74LCX646 Low Voltage Octal Transceiver/Register with 5V Tolerant Inputs and Outputs February 1994 Revised March 2001 74LCX646 Low Voltage Octal Transceiver/Register with 5V Tolerant Inputs and Outputs General Description Features The LCX646 consists of registered bus transceiver circuits,5V tolerant inputs and outputs D-type flip-flops, and control circuitry providing multiplexed2.3V − 3.6V V specifications provided CC transmission of data directly from the input bus or from the 7.0 ns t max (V = 3.3V), 10 μA I max PD CC CC internal storage registers. Data on the A or B bus will be loaded into the respective registers on the LOW-to-HIGHPower down high impedance inputs and outputs transition of the appropriate pin (CPAB or CPBA) (seeSupports live insertion/withdrawal (Note 1) Functional Description). ±24 mA output drive (V = 3.0V) CC The LCX646 is designed for low voltage (2.5V or 3.3V) V CC Implements patented noise/EMI reduction circuitry applications with capability of interfacing to a 5V signal Latch-up performance exceeds 500 mA environment. ESD performance: The LCX646 is fabricated with an advanced CMOS tech- Human body model > 2000V nology to achieve high speed operation while maintaining CMOS low power dissipation. Machine model > 200V Note 1: To ensure the high-impedance state during power up or down, OE should be tied to V through a pull-up resistor: the minimum value or the CC resistor is determined by the current-sourcing capability of the driver. Ordering Code: Order Number Package Number Package Description 74LCX646WM M24B 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 74LCX646MSA MSA24 24-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide 74LCX646MTC MTC24 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Pin Descriptions Pin Names Description A –A Data Register A Inputs 0 7 Data Register A Outputs B –B Data Register B Inputs 0 7 Data Register B Outputs CPAB, CPBA Clock Pulse Inputs SAB, SBA Transmit/Receive Inputs OE Output Enable Input DIR Direction Control Input © 2001 DS011997
