Details, datasheet, quote on part number: MC74F620
PartMC74F620
Category
Description
CompanyMotorola Semiconductor Products
DatasheetDownload MC74F620 datasheet
  

 

Features, Applications
OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS (INVERTING AND NONINVERTING)

The is an octal bus transceiver featuring inverting 3-state buscompatible outputs in both send and receive directions. The BN outputs are capable of sinking 64 mA and sourcing to 15 mA, providing very good capacitive drive characteristics. The is a non-inverting version of the MC74F620. These octal bus transceivers are designed for asynchronous two-way communication between data busses. The control function implementation allows for maximum flexibility in timing. These devices allow data transmission from the A bus to the B bus or from B bus to A bus, depending upon the logic levels at the Enable inputs (OEBA and OEAB). The Enable inputs can be used to disable the device so that the busses are effectively isolated. The dual-enable configuration gives the MC74F620 and MC74F623 the capability to store data by the simultaneous enabling of OEBA and OEAB. Each output reinforces its input in this transceiver configuration. Thus, when both control inputs are enabled and all other data sources to the two sets of the bus lines are at high impedance, both sets of bus lines (16 in all) will remain at their last states. High Impedance NPN base inputs for reduced loading A in High and Low states) Ideal for Applications which Require High Output drive and minimal bus loading Octal Bidirectional Bus Interface 3-State Buffer Outputs Sink 64 mA and Source 15 mA F620 Inverting F623 Noninverting ESD Protection > 4000 Volts


FUNCTION TABLE Inputs OEBA OEAB F620 B data to A bus A data to B bus Z B data to A bus A data to B bus Operating Modes F623 B data to A bus A data to B bus Z B data to A bus A data to B bus

H = HIGH voltage level: L = LOW voltage level: X = Don't care: Z = High impedance "off" state

Limits Symbol VCC TA IOH IOL DC Supply Voltage Operating Ambient Temperature Range Output Current High Output Current High Output Current Low Output Current Low An Outputs Bn Outputs An Outputs Bn Outputs Parameter Min 4.5 0 Typ 5.0 25 Max Unit C mA

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits Symbol VIH VIL VIK Parameter Min Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage 74 An VOH Output HIGH Voltage Bn VOL IOZH + IIH IOZL + IIL Output LOW Voltage Output LOW Voltage Output Off Current HIGH Output Off Current LOW OEBA, OEAB IIH Input HIGH Current OEBA, OEAB Others IIL IOS Input LOW Current Output Short Circuit Current (Note 2) Non I/O Pins A0A7 B0B7 ICCH ICC Power Supply Current F620 ICCL ICCZ ICC Power Supply Current An Bn Typ Max mA VCC = MAX, VOUT = GND Vout = HIGH Vout = LOW Vout = HIGH Z VCC = MAX VCC = MAX Unit mA A Test Conditions (Note 1) Guaranteed as a HIGH Signal Guaranteed as a LOW Signal VCC = MIN, IIN 18 mA IOH 3.0 mA IOH 3.0 mA IOH 3.0 mA IOH 3.0 mA IOH 15.0 mA IOL 24 mA IOL 64 mA VCC = MAX VCC = MAX VCC 4.5 V VCC 4.75 V VCC 4.5 V VCC 4.75 V VCC 4.5 V VCC = MIN VCC = MIN VOUT 2.7 V VOUT 0.5 V

NOTES: 1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type. 2. Not more than one output should be shorted at a time, nor for more than 1 second.


 

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