|Category||Logic => Bus Transceivers|
|Description||Triple Bidirectional Latched Bus Transceiver 3-state Open Collector|
|Company||Philips Semiconductors (Acquired by NXP)|
|Datasheet||Download I74F777A datasheet
74F777 Triple bidirectional latched bus transceiver (3-State + open collector)
Triple bidirectional latched bus transceiver (3State + Open Collector)
Latching transceiver High drive Open Collector output current with minimum output
range to 50 ohms and is terminated on each end with to 40 ohm resistor. The is a triple bidirectional transceiver with Open Collector B and 3State A port output drivers. A latch function is provided for the A port signals. The B port output driver is designed to sink 100mA from 2 volts to minimize crosstalk and ringing on the bus. A separate output threshold clamp voltage (VX) is provided to prevent the A port output High level from exceeding future high density processor supply voltage levels. For 5 volt systems, VX is simply tied to VCC. TYPE 74F777 TYPICAL PROPAGATION DELAY 7.0ns TYPICAL SUPPLY CURRENT( TOTAL) 45mA
Compatible with Test Mode (TM) bus specification Controlled output ramp Multiple package options Industrial temperature range available to +85°C)DESCRIPTION
The is a triple bidirectional latched bus transceiver and is intended to provide the electrical interface to a high performance wiredOR bus. This bus has a loaded characteristics impedance
ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC 5V ±10%, Tamb +70°C 20pin plastic DIP (300 mil) 20pin PLCC N74F777N N74F777A INDUSTRIAL RANGE VCC 5V ±10%, Tamb SOT146-1 SOT380-1 PKG DWG #
PINS A2 PNP latched inputs Data inputs with threshold circuitry A output enable inputs (activeHigh) B output enable inputs (activeLow) Latch enable inputs (activeLow) 3State outputs DESCRIPTION 74F (U.L.) HIGH/LOW OC/166.7 LOAD VALUE HIGH/LOW 3mA/24mA OC/100mA
B2 Open Collector outputs Note to input and output loading and fan out table One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state. OC = Open Collector.
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