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74VCX164245 Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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74VCX164245 Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 9 page © 2005 Fairchild Semiconductor Corporation DS500159 www.fairchildsemi.com March 2000 Revised June 2005 74VCX164245 Low Voltage 16-Bit Dual Supply Translating Transceiver with 3-STATE Outputs General Description The VCX164245 is a dual supply, 16-bit translating trans- ceiver that is designed for two way asynchronous commu- nication between busses at different supply voltages by providing true signal translation. The supply rails consist of VCCB, which is the higher potential rail operating at 2.3V to 3.6V and VCCA, which is the lower potential rail operating at 1.65V to 2.7V. (VCCA must be less than or equal to VCCB for proper device operation.) This dual supply design allows for translation from 1.8V to 2.5V busses to busses at a higher potential, up to 3.3V. The Transmit/Receive (T/R) input determines the direction of data flow. Transmit (active-HIGH) enables data from A Ports to B Ports. Receive (active-LOW) enables data from B Ports to A Ports. The Output Enable (OE) input, when HIGH, disables both A and B Ports by placing them in a High-Z condition. The A Port interfaces with the lower volt- age bus (1.8V 2.5V). The B Port interfaces with the higher voltage bus (2.7V 3.3V). Also the VCX164245 is designed so that the control pins (T/Rn, OEn) are supplied by VCCB. The 74VCX164245 is suitable for mixed voltage applica- tions such as notebook computers using a 1.8V CPU and 3.3V peripheral components. It is fabricated with an Advanced CMOS technology to achieve high speed opera- tion while maintaining low CMOS power dissipation. Features s Bidirectional interface between busses ranging from 1.65V to 3.6V s Supports Live Insertion and Withdrawal (Note 1) s Static Drive (IOH/IOL) r24 mA @ 3.0V VCC r18 mA @ 2.3V VCC r6 mA @ 1.65V VCC s Uses patented noise/EMI reduction circuitry s Functionally compatible with 74 series 16245 s Latchup performance exceeds 300 mA s ESD performance: Human Body Model !2000V Machine model !200V s Also packaged in plastic Fine-Pitch Ball Grid Array (FBGA) Note 1: To ensure the high impedance state during power up or power down, OEn should be tied to VCCB through a pull up resistor. The minimum value of the resistor is determined by the current sourcing capability of the driver. Ordering Code: Note 2: Ordering Code “G” indicates Trays. Note 3: Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Diagram Order Number Package Number Package Description 74VCX164245G (Note 2)(Note 3) BGA54A 54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide 74VCX164245MTD (Note 3) MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide |
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