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TC74AC640F

Toshiba Semiconductor
Part Number TC74AC640F
Manufacturer Toshiba Semiconductor
Description Octal Bus Transceiver
Published Aug 25, 2006
Detailed Description TC74AC245,640P/F/FT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74AC245P, TC74AC245F, TC74AC245FT TC74A...
Datasheet PDF File TC74AC640F PDF File

TC74AC640F
TC74AC640F

Overview
TC74AC245,640P/F/FT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74AC245P, TC74AC245F, TC74AC245FT TC74AC640P, TC74AC640F, TC74AC640FT Octal Bus Transceiver TC74AC245P/F/FT 3-State, Non-Inverting TC74AC640P/F/FT 3-State, Inverting TC74AC245P, TC74AC640P The TC74AC245, 640 are advanced high speed CMOS OCTAL BUS TRANSCEIVERs fabricated with silicon gate and double-layer metal wiring C2MOS technology.
They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation.
They are intended for two-way asynchronous communication between data busses.
The direction of data transmission is determined by the level of the DIR input.
The enable input ( G ) can be used to disable the device so that the busses are effectively isolated.
All inputs are equipped with protection circuits against static discharge or transient excess voltage.
TC74AC245F, TC74AC640F Features (Note 1)(Note 2) TC74AC245FT, TC74AC640FT • High speed: tpd = 3.
9 ns (typ.
) at VCC = 5 V • Low power dissipation: ICC = 8 μA (max) at Ta = 25°C • High noise immunity: VNIH = VNIL = 28% VCC (min) • Symmetrical output impedance: |IOH| = IOL = 24 mA (min) Capability of driving 50 Ω transmission lines.
• Balanced propagation delays: tpLH ∼− tpHL • Wide operating voltage range: VCC (opr) = 2 V to 5.
5 V • Pin and function compatible with 74F245/640 Note 1: Do not apply a signal to any bus terminal when it is in the output mode.
Damage may result.
Weight DIP20-P-300-2.
54A SOP20-P-300-1.
27A TSSOP20-P-0044-0.
65A : 1.
30 g (typ.
) : 0.
22 g (typ.
) : 0.
08 g (typ.
) Note 2: All floating (high impedance) bus terminals must have their input levels fixed by means of pull up or pull down resistors.
Start of commercial production 1986-05 1 2014-03-01 Pin Assignment DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GND 10 TC74AC245 (top view) IEC Logic Symbol 20 VCC 19 G 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 G (19) DIR (1) TC74AC245 G3 ...


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