|Category||Logic => Bus Interface => Bus Oriented Circuits|
|Title||Bus Oriented Circuits|
|Description||Octal Bidirectional Transceiver With 3-STATE Inputs/outputs|
|Datasheet||Download 74F545 datasheet
The 8-bit, 3-STATE, high-speed transceiver. It provides bidirectional drive for bus-oriented microprocessor and digital communications systems. Straight through bidirectional transceivers are featured, with 24 mA bus drive capability on the A Ports and 64 mA bus drive capability on the B Ports. One input, Transmit/Receive (T/R) determines the direction of logic signals through the bidirectional transceiver. Transmit enables data from A-to-B Ports; Receive enables data from B-to-A Ports. The Output Enable input disables both A and B Ports by placing them a 3-STATE condition.Features
s Higher drive than s 8-bit bidirectional data flow reduces system package count s 3-STATE inputs/outputs for interfacing with bus-oriented systems 24 mA and 64 mA bus drive capability on A and B Ports, respectively s Transmit/Receive and Output Enable simplify control logic s Guaranteed 4000V minimum ESD protection
Order Number 74F545SC 74F545PC Package Number M20B N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
U.L. Pin Names OE T/R A0A7 Description HIGH/LOW Output Enable Input (Active LOW) Transmit/Receive Input Side A 3-STATE Inputs or 3-STATE Outputs B0B7 Side B 3-STATE Inputs or 3-STATE Outputs Input IIH/IIL Output IOH/IOL mA (20 mA) mA (48 mA)H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias VCC Pin Potential to Ground Pin Input Voltage (Note 2) Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output 3-STATE Output Current Applied to Output in LOW State (Max) ESD Last Passing Voltage (Min) twice the rated IOL (mA) -0.5V to VCC +5.0 mA
Note 1: Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. Note 2: Either voltage limit or current limit is sufficient to protect inputs.
Symbol VIH VIL VCD VOH Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage 10% VCC 10% VCC 10% VCC 5% VCC 5% VCC VOL IIH IBVI IBVIT ICEX VID IOD IIL IIH + IOZH IIL + IOZL IOS IZZ ICCH ICCL ICCZ Output LOW Voltage Input HIGH Current Input HIGH Current Breakdown Test Input HIGH Current Breakdown (I/O) Output HIGH Leakage Current Input Leakage Test Output Leakage Circuit Current Input LOW Current Output Leakage Current Output Leakage Current Output Short-Circuit Current Bus Drainage Test Power Supply Current Power Supply Current Power Supply Current VCC 10% VCC µA mA Min V Min 0.8 -1.2 Typ Max Units V Min VCC Conditions Recognized as a HIGH Signal Recognized as a LOW Signal IIN -18 mA (OE, T/R) IOH -1 mA (An) IOH -3 mA (An) IOH -15 mA (Bn) IOH -1 mA (An) IOH -3 mA (An) IOL (A n) IOL (B n) VIN = 2.7V (OE, T/R) VIN = 7.0V (OE, T/R) VIN = 5.5V (An, Bn) VOUT = VCC IID 1.9 µA All Other Pins Grounded VIOD 150 mV All Other Pins Grounded VIN = 0.5V (OE, T/R) VOUT = 2.7V (An, Bn) VOUT = 0.5V (An, Bn) VOUT = 0V (An) VOUT = 0V (Bn) VOUT VO = HIGH VO = LOW VO = HIGH Z
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