Name: 74HC646 IC - (SMD Package) - Octal Bus Transceiver Register IC (74646 IC)
Brand: Generic
SKU: 0-9003783
Price: 66 INR
Availability: InStock

The M74HC646 are high speed CMOS OCTAL BUS TRANSCEIVERS AND REGISTERS, (3-STATE) fabricated in silicon gate C2 MOS technology. They have the same high speed performance of LSTTL combined with true CMOS low power consumption. These devices consist of bus transceiver circuits with 3-state output, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus will be clocked into the registers on the low-to-high transition of the appropriate clock pin (Clock AB - or Clock BA). Enable(G) and direction (DIR) pins are provided to control the

transceiver functions. In the transceiver mode, data present at the high-impedance port may be stored

in either register or in both. The select controls (Select AB select BA) can multiplex stored and real-time (transparent mode) data. The direction control determines which bus will receive data when enable G is active (low). In the isolation mode (enable G high), â€_x009d_Aâ€_x009d_ data may be stored in one register and/or â€_x009d_Bâ€_x009d_ data may be stored in the other register. When an output function is disabled, the input function is still enabled and may be used to store and transmit data. Only one of the two buses, A or B, may be driven at a time. All inputs are equipped with protection circuits

Features :

HIGH SPEED :fMAX = 73 MHz (TYP.) AT VCC =5V

LOW POWER DISSIPATION :Â ICC = 4 ÂµA (MAX.) AT TA = 25 Â°C

HIGH NOISE IMMUNITY :Â VNIH = VNIL= 28 % VCC (MIN.)

OUTPUT DRIVE CAPABILITYÂ 15 LSTTL LOADS

BALANCED PROPAGATION DELAYS :Â tPLH = tPHL

WIDE OPERATING VOLTAGE RANGE :Â VCC (OPR) = 2 V TO 6 V

Specifications :-

Symbol	Parameter	Value	Unit
VCC	Supply Voltage	-0.5 to +7	V
VI	DC Input Voltage	-0.5 to VCC + 0.5	V
VO	DC Output Voltage	-0.5 to VCC + 0.5	V
IIK	DC Input Diode Current	+20	mA
IOK	DC Output Diode Current	+20	mA
IO	DC Output Source Sink Current Per Output Pin	+35	mA
CC or IGND	DC VCC or Ground Current	+70	mA
PD	Power Dissipation	500	mW
Tstg	Storage Temperature	- 65 to +150	o C
TL	Lead Temperature (10 sec)	300	o C