|Category||Logic => Bus Transceivers|
|Description||Fast CMOS Octal Bus Transceivers ( 3-state )|
|Company||Integrated Device Technology, Inc.|
|Datasheet||Download IDT54FCT623AT datasheet
Std., A and C speed grades Low input and output leakage 1µA (max.) CMOS power levels True TTL input and output compatibility VOH = 3.3V (typ.) VOL = 0.3V (typ.) High drive outputs (-15mA IOH, 64mA IOL) Power off disable outputs permit "live insertion" Meets or exceeds JEDEC standard 18 specifications Product available in Radiation Tolerant and Radiation Enhanced versions Military product compliant to MIL-STD-883, Class B and DESC listed (dual marked) Available in DIP, SOIC, CERPACK and LCC packagesDESCRIPTION
The is a non-inverting octal transceiver with 3-state bus-driving outputs in both the send and receive directions. The B bus outputs are capable of sinking 64mA and sourcing to 15mA, providing very good capacitive drive characteristics. These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control function implementation allows for maximum flexibility in timing. One important feature of the FCT623T/AT/CT is the Power Down Disable capability. When the GAB and GBA inputs are conditioned to put the device in high-Z state, the I/O ports will maintain high impedance during power supply ramps and when VCC = 0V. This is a desirable feature in back-plane applications where it may be necessary to perform "live" insertion and removal of cards for on-line maintenance. It is also a benefit in systems with multiple redundancy where one or more redundant cards may be powered-off.The IDT logo is a registered trademark of Integrated Device Technology, Inc.
Pin Names GBA, GAB - B8 Description Enable Inputs A Bus Inputs or 3-State Outputs B Bus Inputs or 3-State Outputs
Symbol Rating Commercial VTERM(2) Terminal Voltage to +7.0 with Respect to GND VTERM(3) Terminal Voltage 0.5 to with Respect to VCC +0.5 GND TA Operating to +70 Temperature TBIAS Temperature to +125 Under Bias TSTG Storage to +125 Temperature PT Power Dissipation 0.5 I OUT DC Output Current to +120 Military to +7.0 Unit VEnable Inputs GAB Outputs B data to A bus A data to B bus Z B data to A bus A data to B bus
NOTES: H = HIGH Voltage Level L = LOW Volage Level Z = High-Impedance (OFF) state
2563 lnk 03 NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. No terminal voltage may exceed VCC by +0.5V unless otherwise noted. 2. Input and VCC terminals only. 3. Outputs and I/O terminals only.
Symbol Parameter(1) CIN Input Capacitance COUT Output Capacitance Conditions VIN = 0V VOUT = 0V Typ. 6 8 Max. Unit pF 122563 lnk 04 NOTE: 1. This parameter is measured at characterization but not tested.
Following Conditions Apply Unless Otherwise Specified: Commercial: ± 5%; Military: to +125°C, VCC ± 10%
Symbol VIH VIL L II VIK IOS VOH Parameter Input HIGH Level Input LOW Level Input HIGH Input HIGH Current (5) Current (5) Input LOW Current (5) Clamp Diode Voltage Short Circuit Current Output HIGH Voltage (A and B Bus) Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., = 2.7V VCC = Max., = 0.5V VCC = Max., VI = VCC (Max.) VCC = Min., = 18mA VCC VO = GND IOH = 6mA MIL. IOH = 8mA COM'L. IOH = 12mA MIL. IOH = 15mA COM'L. VCC = Min. IOL = 32mA MIL. (4) VIN = VIH or VIL IOL = 48mA COM'L. VCC = Min. IOL = 48mA MIL. (4) VIN = VIH or VIL IOL = 64mA COM'L. VCC = 0V, VIN VO 4.5V
Output LOW Voltage (A Bus) Output LOW Voltage (B Bus) Input/Output Power Off Leakage(6) Input Hysteresis Quiescent Power Supply Current
NOTES: 2563 tbl 05 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC 5.0V, +25°C ambient. 3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second. 4. These are maximum IOL values per output, for 8 outputs turned on simultaneously. Total maximum IOL (all outputs) is 512mA for commercial and 384mA for military. Derate IOL for number of outputs exceeding 8 turned on simultaneously. 5. The test limit for this parameter 55°C. 6. This parameter is guaranteed but not tested.
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