MC74F544 Octal Registered Transceivers contain sets D-Type latches tem
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MC74F544 OCTAL REGISTERED TRANSCEIVER, INVERTING, 3-STATE
MC74F544 Octal Registered Transceivers contain sets D-Type latches temporary storage data flowing either direction. Separate Latch Enable (LEAB, LEBA) Enable (OEAB, OEBA) inputs provided each register permit independent control inputting outputting either direction data flow. MC74F544 inverting data path. outputs guaranteed sink while outputs rated
OCTAL REGISTERED TRANSCEIVER, INVERTING, 3-STATE
FASTSCHOTTKY
Combines 74F245 74F373 Type Functions Chip 8-Bit Octal Transceiver Inverting Back-to-Back Registers Storage Separate Controls Data Flow Each Direction Glitchless Outputs During 3-State Power Power Down Operation High Impedance Outputs Power State Outputs Sink Source Outputs Sink Source F543 Noninverting Version Protection 4000 Volts
SUFFIX PLASTIC CASE 724-03
SUFFIX SOIC CASE 751E-03
ASSIGNMENT
LEAB OEAB
ORDERING INFORMATION
MC74FXXXN Plastic MC74FXXXDW SOIC
LEBA OEBA
GUARANTEED OPERATING RANGES
Symbol Supply Voltage Operating Ambient Temperature Range Output Current High Output Current Parameter Unit
FAST DATA 4-216
MC74F544
FUNCTION TABLE
Inputs OEXX LEXX Data Outputs Status Outputs disabled Outputs disabled Outputs disabled Data latched Data latched Transparent Hold
HIGH voltage level: HIGH state must present set-up time before LOW-to-HIGH transition LEXX BA): voltage level: state must present set-up time before LOW-to-HIGH transition LEXX BA): Don't care: HIGH impedance state: Change.
FUNCTIONAL DESCRIPTION MC74F544 contains sets eight D-type latches, with separate input controls each set. data flow from example, A-to-B Enable (EAB) input must order enter data from take data from indicated Function Table. With LOW, signal A-to-B latch enable (LEAB) input makes A-to-B latches transparent; subsequent LOW-to-HIGH
transition LEAB signal puts latches storage mode their outputs longer change with inputs. With OEAB both LOW, 3-State output buffers active reflect inverted data present output latches. Control data flow from similar, using EBA, LEBA, OEBA inputs.
CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol Input HIGH Voltage Input Voltage Input Clamp Diode Voltage Output HIGH Voltage Output Voltage Pins Input HIGH Current Control Pins Control Pins Pins IOZH IOZL Input Current Off-State Output Current Off-State Output Current, Low-Level Voltage Applied Output Short Circuit Current (Note Outputs Outputs ICCH ICCL ICCZ EAB, Other Inputs Parameter 0.73 0.35 0.55 -150 -225 Unit Test Conditions (Note Guaranteed Input HIGH Voltage Guaranteed Input Voltage MIN, 4.75
MAX, MAX, MAX, MAX, MAX, VOUT MAX, VOUT MAX, VOUT
Total Supply Current
NOTES: conditions shown MAX, appropriate value specified under recommended operating conditions applicable device type. more than output should shorted time, more than second.
FAST DATA 4-217
MC74F544
ELECTRICAL CHARACTERISTICS
25°C Symbol tPLH tPHL tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation Delay Transparent Mode Propagation Delay LEBA Propagation Delay LEAB Output Enable Time OEBA OEAB Output Disable Time OEBA OEAB Parameter 10.5 70°C 10.5 14.5 10.5 14.5 10.5 Unit
OPERATING REQUIREMENTS
25°C Symbol ts(H) ts(L) th(H) th(L) tw(L) Parameter Setup Time, HIGH LEBA LEAB Hold Time, HIGH LEBA LEAB Latch Enable, Pulse Width, 70°C Unit
FAST DATA 4-218
MC74F544
LOGIC DIAGRAM
DETAIL
DETAIL
OEBA OEAB LEBA LEAB
NOTE: Please note that this diagram provided only understanding logic operations should used estimate propagation delays.
FAST DATA 4-219
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