PI74AVC164245LAAEX

PI74AVC164245LA 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 16-Bit 1.5-2.5V to 3.3V Level Shifting Transceiver with 3-State Outputs Features Description • PI74AVC164245LA is designed for low voltage operation: 1.5V - 2.5V to 3.3V Pericom Semiconductor’s PI74AVC164245LA, a 16-bit (dual-octal) noninverting bus transceiver, contains two separate supply rails: B port (VCCB), set at 3.3V, and A port (VCCA), set to operate at 1.5-2.5V. This arrangement permits translation from a 1.5-2.5V to 3.3V environment and vice versa. The control pins, OE and DIR are controlled by VCCB . • Industrial operation at –40°C to +85°C • Packag (Pb-free & Green available): – 48-pin plastic 240-mil TSSOP (A) – 48-pin plastic 173-mil TVSOP (K) The PI74AVC164245LA is designed for asynchronous communication between data buses. Truth Table (each 8-bit section) To ensure the high impedance state during power up or power down, the output-enable (OE) input should be tied to VCC through a pullup resistor: the minimum value of the resistor is determined by the current-sinking capability of the driver. Inputs Ope ration OE DIR L L H L H X B data to A bus A data to B bus Isolation Block Diagram 1DIR Pin Configuration 1 48 1A1 1OE 47 2 1B1 To Seven Other Channels 2DIR 24 25 2A1 2OE 36 13 2B1 To Seven Other Channels 08-0291 1 (LVTTL)1DIR 1 48 1OE(LVTTL) 1B1 2 47 1A1 1B2 3 46 1A2 GND 4 45 GND 1B3 5 44 1A3 1B4 6 43 1A4 (3.3V)VCCB 7 42 VCCA(1.5V-2.5V) 1B5 8 41 1A5 1B6 9 40 1A6 GND 10 39 GND 1B7 11 38 1A7 1B8 12 37 1A8 2B1 13 2A1 2B2 14 48-Pin 36 A, K 35 GND 15 34 GND 2B3 16 33 2A3 2A2 2B4 17 32 2A4 (3.3V)VCCB 18 31 VCCA(1.5V-2.5V) 2B5 19 30 2A5 2B6 20 29 2A6 GND 21 28 GND 2B7 22 27 2A7 2B8 23 26 2A8 (LVTTL)2DIR 24 25 2OE(LVTTL) PS8600C 11/06/08 PI74AVC164245LA 16-Bit 1.5-2.5V to 3.3V Level Shifting Transceiver with 3-State Outputs 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Absolute maximum ratings over operating free-air temperature range from VCCB at 3.3V & VCCA at 1.5 - 2.5V, unless otherwise noted) Supply voltage range: VCCA .................................. –0.5V to 3.8V VCCB .................................. –0.5V to 4.6V Input Voltage Range, VI Except I/O ports(1) ......–0.5V to 4.6V I/O port A(2) ... –0.5V to VCCA+0.5V I/O port B(1) .... –0.5V to VCCB+0.5V Input clamp current, IIK (VI