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74VCX162601 Fiches technique(PDF) 1 Page - Fairchild Semiconductor |
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74VCX162601 Fiches technique(HTML) 1 Page - Fairchild Semiconductor |
1 / 8 page April 1998 Revised April 1999 © 1999 Fairchild Semiconductor Corporation DS500150.prf www.fairchildsemi.com 74VCX162601 Low Voltage 18-Bit Universal Bus Transceivers with 3.6V Tolerant Inputs and Outputs and 26 Ω Series Resistors in the B-Port Outputs General Description The VCX162601, 18-bit universal bus transceiver, com- bines D-type latches and D-type flip-flops to allow data flow in transparent, latched, and clocked modes. Data flow in each direction is controlled by output-enable (OEAB and OEBA), latch-enable (LEAB and LEBA), and clock (CLKAB and CLKBA) inputs. The clock can be con- trolled by the clock-enable (CLKENAB and CLKENBA) inputs. For A-to-B data flow, the device operates in the transparent mode when LEAB is HIGH. When LEAB is LOW, the A data is latched if CLKAB is held at a HIGH-to- LOW logic level. If LEAB is LOW, the A bus data is stored in the latch/flip-flop on the LOW-to-HIGH transition of CLKAB. Output-enable OEAB is active-LOW. When OEAB is HIGH, the outputs are in the HIGH-impedance state. Data flow for B to A is similar to that of A to B but uses OEBA, LEBA, CLKBA and CLKENBA. The 74VCX162601 is designed for low voltage (1.65V to 3.6V) VCC applications with I/O compatibility up to 3.6V. The VCX162601 is also designed with 26 Ω series resistors in the B-Port outputs. This design reduces line noise in applications such as memory address drivers, clock driv- ers, and bus transceivers/transmitters. Features s 1.65V–3.6V VCC supply operation s 3.6V tolerant inputs and outputs s 26 Ω series resistors in B-Port outputs s tPD (A to B) 3.8 ns max for 3.0V to 3.6V VCC 4.6 ns max for 2.3V to 2.7V VCC 9.2 ns max for 1.65V to 1.95V VCC s Power-down high impedance inputs and outputs s Supports live insertion/withdrawal (Note 1) s Static Drive (IOH/IOL B outputs) ±12 mA @ 3.0V V CC ±8 mA @ 2.3V V CC ±3 mA @ 1.65V V CC s Uses patented noise/EMI reduction circuitry s Latchup performance exceeds 300 mA s ESD performance: Human body model > 2000V Machine model >200V Note 1: To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pull-up resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver. Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Pin Descriptions Order Number Package Number Package Description 74VCX162601MTD MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Pin Names Description OEAB, OEBA Output Enable Inputs (Active LOW) LEAB, LEBA Latch Enable Inputs CLKAB, CLKBA Clock Inputs CLKENAB, CLKENBA Clock Enable Inputs A1–A18 Side A Inputs or 3-STATE Outputs B1–B18 Side B Inputs or 3-STATE Outputs |
Numéro de pièce similaire - 74VCX162601 |
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Description similaire - 74VCX162601 |
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