TC74HCT646AP_07 Datasheet, PDF (1/8 Pages) Toshiba Semiconductor – Octal Bus Transceiver/Register (3-state)

TC74HCT646AP
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74HCT646AP
Octal Bus Transceiver/Register (3-state)
The TC74HCT646A is high speed CMOS OCTAL BUS
TRANSCEIVER/REGISTERs 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.
This device is bus transceiver with 3-state outputs, D-type
flip-flops, and control circuitry arranged for multiplexed
transmission of data directly from the internal registers.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Weight: 1.50 g (typ.)
Features (Note 1)(Note 2)
• High speed: f_max = 60 MHz (typ.) at V_CC = 5 V
• Low power dissipation: I_CC = 4 μA (max) at Ta = 25°C
• Compatible with TTL output: V_IH = 2.0 V (min)
V_IL = 0.8 V (max)
• Output drive capability: 15 LSTTL loads
• Symmetrical output impedance: |I_OH| = I_OL = 6 mA (min)
• Balanced propagation delays: t_pLH ^∼− t_pHL
• Pin and function compatible with 74LS646
Note 1: Do not apply a signal to any bus terminal when it is in 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 pull
down resistors.
Pin Assignment
1
2007-10-01