TC74LCX245FT(EL,K) Toshiba

TC74LCX245F/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74LCX245F, TC74LCX245FT, TC74LCX245FK Low-Voltage Octal Bus Transceiver with 5-V Tolerant Inputs and Outputs The TC74LCX245 is a high-performance CMOS octal bus transceiver. Designed for use in 3.3-V systems, it achieves high-speed operation while maintaining the CMOS low power TC74LCX245F dissipation. The device is designed for low-voltage (3.3 V) V applications, CC but it could be used to interface to 5-V supply environment for both inputs and outputs. The direction of data transmission is determined by the level of the DIR input. The enable input ( OE ) can be used to disable the device so that the busses are effectively isolated. All inputs are equipped with protection circuits against static discharge. TC74LCX245FT Features (Note) Low-voltage operation: V = 1.65 to 3.6 V CC High-speed operation: t = 7.0 ns (max) (V = 3.0 to 3.6 V) pd CC Ouput current: I /I = 24 mA (min) (V = 3.0 V) OH OL CC Latch-up performance: 500 mA Available in JEITA SOP, TSSOP and VSSOP (US) Bidirectional interface between 5.0 V and 3.3 V signals TC74LCX245FK Power-down protection provided on all inputs and outputs Pin and function compatible with the 74 series (74AC/VHC/HC/F/ALS/LS etc.) 245 type Note: Do not apply a signal to any bus pins when it is in the output mode. Damage may result. All floating (high impedance) bus pins must have their input levels fixed by means of pull-up or pull-down resistors. Weight SOP20-P-300-1.27A : 0.22g (typ.) TSSOP20-P-0044-0.65A : 0.08 g (typ.) VSSOP20-P-0030-0.50 : 0.03 g (typ.) Note: The Electrical Characteristics of V =1.80.15V is only applicable for products which manufactured CC from January 2009 onward. Start of commercial production 1994-03 1 2014-03-01 TC74LCX245F/FT/FK Pin Assignment (top view) IEC Logic Symbol 19 OE G3 DIR 1 20 V CC 1 DIR 3EN1 (BA) A1 2 19 OE 3EN2 (AB) A2 3 18 B1 2 18 A1 1 B1 A3 4 17 B2 2 3 17 A2 B2 A4 5 16 B3 4 16 A5 6 15 B4 A3 B3 A6 7 14 B5 5 15 A4 B4 A7 8 13 B6 6 14 A5 B5 A8 9 12 B7 7 13 A6 B6 GND 10 11 B8 8 12 A7 B7 9 11 A8 B8 Truth Table Inputs Function Outputs OE DIR A-Bus B-Bus L L A = B Output Input L H B = A Input Output H X Z Z X: Dont care Z: High impedance 2 2014-03-01