MC74F1245 contains eight noninverting bidirectional buffers with 3-sta
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MC74F1245 OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS
MC74F1245 contains eight noninverting bidirectional buffers with 3-state outputs intended bus-oriented applications. Current sinking capability ports ports. Transmit/ Receive (T/R) input determines direction data flow through bidirectional transceiver. Transmit (active HIGH) enables data from ports ports; Receive (active LOW) enables data from ports ports. Output Enable input, when HIGH, disables both ports placing them high-Z condition. Noninverting Buffers Bidirectional Data Path Outputs Sink High Impedance Inputs Reduced Loading Same Function Pinout F245 Protection 4000 Volts ASSIGNMENT
OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS
FASTSCHOTTKY
SUFFIX CERAMIC CASE 732-03
SUFFIX PLASTIC CASE 738-03
SUFFIX SOIC CASE 751D-03
LOGIC SYMBOL
ORDERING INFORMATION
MC74FXXXXJ Ceramic MC74FXXXXN Plastic MC74FXXXXDW SOIC
GUARANTEED OPERATING RANGES
Symbol Parameter Supply Voltage Operating Ambient Temperature Range Output Current High Output Current Output Current High Output Current Outputs Outputs Outputs Outputs -3.0 Unit
FAST DATA 4-264
MC74F1245
FUNCTION TABLE Inputs Inputs Inputs/Outputs Inputs
HIGH voltage level: voltage level: Don't care: HIGH impedance "off" state.
LOGIC DIAGRAM
FAST DATA 4-265
MC74F1245
CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol Parameter Input HIGH Voltage Input Voltage Input Clamp Diode Voltage Output HIGH Voltage Outputs Output HIGH Voltage Outputs IOZH IOZL Output Voltage Outputs Output Voltage Outputs Output Current HIGH Output Current Inputs Input HIGH Current Inputs Inputs Inputs IIHH Input HIGH Current Input Current Inputs Output Short Circuit Current (Note Outputs Outputs ICCH Power Supply Current ICCL ICCZ -100 -150 -225 Inputs Inputs -0.73 0.35 -1.2 0.55 Unit MAX, VOUT -3.0 -3.0 Test Conditions (Note Guaranteed Input HIGH Voltage Guaranteed Input Voltage MIN, 4.75 4.75 VOUT
MAX, VOUT MAX, MAX, MAX,
NOTES: conditions shown MAX, appropriate value specified under recommended operating conditions applicable device type. more than output should shorted time, more than second.
ELECTRICAL CHARACTERISTICS
+25°C +5.0 Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Propagation Delay Transparent Mode Output Enable Time Output Disable Time 10.0 10.0 +70°C +5.0 ±10% 11.0 11.0 Unit
FAST DATA 4-266
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