PI74AVC164245LA 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 1 234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901 2 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: Pericom Semiconductors PI74AVC164245LA, a 16-bit (dual-octal) 1.5V - 2.5V to 3.3V noninverting bus transceiver, contains two separate supply rails: B port (V ), set at 3.3V, and A port (V ), set to operate CCB CCA Industrial operation at 40C to +85C at 1.5-2.5V. This arrangement permits translation from a 1.5-2.5V to Packag (Pb-free & Green available): 3.3V environment and vice versa. The control pins, OE and DIR are 48-pin plastic 240-mil TSSOP (A) controlled by V . CCB 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 Inputs down, the output-enable (OE) input should be tied to V through CC Operation a pullup resistor: the minimum value of the resistor is determined by OE DIR the current-sinking capability of the driver. L L B data to A bus L H A data to B bus H X Isolation Block Diagram Pin Configuration 1 48 (LVTTL)1DIR 1OE(LVTTL) 2 47 1B1 1A1 1 1DIR 1B2 3 46 1A2 GND 4 45 GND 48 1OE 5 44 1B3 1A3 6 43 1B4 1A4 47 1A1 (3.3V)V 7 42 V (1.5V-2.5V) CCB CCA 8 41 1B5 1A5 2 1B6 9 40 1A6 1B1 GND 10 39 GND 11 38 1B7 1A7 To Seven Other Channels 12 37 1B8 1A8 48-Pin 13 36 2B1 2A1 24 A, K 2DIR 14 35 2B2 2A2 GND 15 34 GND 25 2OE 33 2B3 16 2A3 17 32 2B4 2A4 36 (3.3V)V 18 31 V (1.5V-2.5V) CCB CCA 2A1 2B5 19 30 2A5 2B6 20 29 2A6 13 2B1 21 28 GND GND 22 27 2B7 2A7 To Seven Other Channels 23 26 2A8 2B8 (LVTTL)2DIR 24 25 2OE(LVTTL) 08-0291 PS8600C 11/06/08 1PI74AVC164245LA 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 V at 3.3V & V at 1.5 - 2.5V, unless otherwise noted) CCB CCA Supply voltage range: V .................................. 0.5V to 3.8V CCA Continuous output current, I ............................................... 50mA O V .................................. 0.5V to 4.6V CCB Continuous current through each V or GND ...........100mA CC (1) Input Voltage Range, V Except I/O ports ...... 0.5V to 4.6V (3) I Package thermal impedance, 0 : A package .......... 89C/W JA (2) I/O port A ... 0.5V to V +0.5V CCA K package ............................ 58C/W (1) I/O port B .... 0.5V to V +0.5V CCB V package ............................ 94C/W Input clamp current, I (V <0) .................................... 50mA IK I Storage temperature range, T ........................... 65C to 150C STG Output clamp current, I (V <0) .............................. 50mA OK O Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. (4) Recommended Operating Conditions for V at 3.3V CCB M.in. Msax Unit (1) VS0upply voltage 36. 3. CCB VH2igh-level voltage IH VL8ow-level voltage 0. V IL VI0nput Voltage V IA CCB VO0utput Voltage V OB CCB IH2igh-level output current 1 OH mA IL2ow-level output current 1 OL t/vI0nput transition rise or fall rate 1Vns/ TO0perating free-air temperature 54 8C A (4) Recommended Operating Conditions for V at 2.5V CCA M.in. Msax Unit (2) VS3upply voltage 27. 2. CCA VHVigh-level voltage =72.3V to 2.7V 1. IH CCA VLVow-level voltage =72.3V to 2.7V 0. V IL CCA VI0nput voltage V IB CCA VO0utput voltage V OA CCA V=82.3V CCA I High-level output current OH V=22.7V 1 mA CCA V=82.3V CCA I Low-level output current OL V=22.7V 1 CCA t/v Input transition rise or fall rate 1V0 ns/ TO0perating free-air temperature 54 8C A Notes: 1. This value is limited to 4.6V maximum. 2. This value is limited to 3.8V maximum. 3. The package thermal impedance is calculated in accordance with JESD 51. 4. To ensure proper device operation, all unused device inputs must be held at the associated V or GND. CC 08-0291 PS8600C 11/06/08 2