74LVC161284 LOW VOLTAGE HIGH SPEED IEEE1284 TRANSCEIVER HIGH SPEED: t = 9ns (MAX.) at V =3V PD CC LOW POWER DISSIPATION: I =20A(MAX) at V =3.6V T =85C CC CC A TTL COMPATIBLE INPUTS V =2V (MIN) V =0.8(MAX) IH IL TSSOP OPERATING VOLTAGE RANGE: V (OPR) = 3.0V to 3.6V CC A PORT HAVE STANDARD 4mA TOTEM ORDER CODES POLE OUTPUT PACKAGE TUBE T & R B PORT HIGH DRIVE SOURCE/SINK TSSOP 74LVC161284TTR CAPABILITY OF 14mA SUPPORT IEEE STD 1284-I (LEVEL 1 TYPE) PIN CONNECTION AND IEEE STD 1284-II (LEVEL 2 TYPE) FOR BIDIRECTIONAL PARALLEL COMMUNICATIONS BETWEEN PERSONAL COMPUTER ANT PRINTING PERIPHERALS TRANSLATION CAPABILITY ALLOW OUTPUTSON CABLESIDETO INTERFACE WITH 5V SIGNAL PULL-UP RESISTOR INTEGRATED ON ALL OPEN-DRAIN OUTPUT ELIMINATE THE NEED FOR DISCRETE RESISTOR REPLACE THE FUNCTION OF TWO 74LVC1284 DEVICES DESCRIPTION The 74LVC161284 contains eight high speed non inverting bidirectional buffers and eleven control/ status non-inverting buffers with open drain 2 outputs fabricated in silicon gate C MOS technology. Its intended to provide a standard signaling method for a bi-direction parallel peripheral in an Extended Capabilities Port Mode (ECP). The HD (Active HIGH) input pin enables the Cable port to switch from Open Drain to a high drive totem pole output, capable of sourcing 14mA on all thirteen buffer and 84mA on PERI LOGIC OUTPUT buffer. The DIR input determines the direction of data flow on the bidirectional buffers. DIR (Active HIGH) enables data flow from A port to B port. DIR (Active LOW) enables data flow from B port to A port. It is available in the commercial temperature range. May 2003 1/11 Obsolete Product(s) - Obsolete Product(s)74LVC161284 LOGIC DIAGRAM NOTE A: The PMOS transistors prevent backdriving current from the signal pins to V when V is open or at GND. The CC/CABLE CC/CABLE PMOS transistor is turned off when the associated driver is in the low state. NOTE B: The PMOS transistor prevents backdriving current from the signal pins to V when V is open or at GND. CC/CABLE CC/CABLE PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1 HD High Drive Enable Input 2, 3, 4, 5, 6 A9 to A13 Side A Input 8, 9, 11, 12, 13, 14, 16, 17 A1 to A8 Side A Input or Output PLI 19 Peripheral Logic Input 20, 21, 22, 23 A14 to A17 Side A Output 24 HLO Host Logic Output HLI 25 Host Logic Input 29, 28, 27, 26 C14 to C17 Side Cable Output 30 PLO Peripheral Logic Output 41, 40, 38, 37, 36, 35, 33, 32 B1 to B8 Side Cable Input or Output 47, 46, 45, 44, 43 Y9 to Y13 Side Cable Output 48 DIR Direction Control Input 10, 15, 34, 39 GND Ground (0V) 7, 18 V Positive Supply Voltage CC V 31, 42 Cable Power Supply CC/CABLE 2/11 Obsolete Product(s) - Obsolete Product(s)