TC74HCT245AP/AF
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74HCT245AP,TC74HCT245AF
Octal Bus Transceiver (3-state)
The TC74HCT245A is high speed CMOS OCTAL BUS
TRANSCEIVER fabricated with silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent
LSTTL while maintaining the CMOS low power dissipation.
Its inputs are compatible with TTL, NMOS, and CMOS output
voltage levels.
It is 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.
TC74HCT245AP
TC74HCT245AF
Features (Note 1) (Note 2)
•
High speed: tpd = 10 ns (typ.) at VCC = 5 V
•
Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
•
Compatible with TTL outputs: VIL = 0.8 V (max)
VIH = 2.0 V (min)
•
Wide interfacing ability: LSTTL, NMOS, CMOS
•
Output drive capability: 15 LSTTL loads
•
•
Symmetrical output impedance: |IOH| = IOL = 6 mA (min)
Balanced propagation delays: tpLH ∼ tpHL
−
•
Pin and function compatible with 74LS245
Weight
DIP20-P-300-2.54A
SOP20-P-300-1.27A
: 1.30 g (typ.)
: 0.22 g (typ.)
Note 1: Do not apply a signal to any bus terminal when it is the output mode. Damage may result.
Note 2: All floating (high impedance) bus terminals must have their input levels fixed by means of pull up or down
resistors.
Pin Assignment
1
2007-10-01
