54F253FM Datasheet

Dual 4-input Multiplexer With Tri-state Outputs


Features, Applications

The is a dual 4-input multiplexer with TRI-STATE outputs It can select two bits of data from four sources using common select inputs The output may be individually switched to a high impedance state with a HIGH on the respective Output Enable (OE) inputs allowing the outputs to interface directly with bus oriented systems

Multifunction capability Non-inverting TRI-STATE outputs Guaranteed 4000V minimum ESD protection

Package Description (0 300 Wide) Molded Dual-In-Line 16-Lead Ceramic Dual-In-Line (0 150 Wide) Molded Small Outline JEDEC (0 300 Wide) Molded Small Outline EIAJ 16-Lead Cerpack 20-Lead Ceramic Leadless Chip Carrier Type C

Note 1 Devices also available in 13 reel Use suffix e SCX and SJX Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB

TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation

54F 74F Pin Names � S1 OEa OEb Za Zb Description Side A Data Inputs Side B Data Inputs Common Select Inputs Side A Output Enable Input (Active LOW) Side B Output Enable Input (Active LOW) TRI-STATE Outputs UL HIGH LOW Input IIH IIL Output IOH IOL mA (20 mA)

This device contains two identical 4-input multiplexers with TRI-STATE outputs They select two bits from four sources selected by common Select inputs (S0 S1) The 4-input multiplexers have individual Output Enable (OEa OEb) inputs which when HIGH force the outputs to a high impedance (High Z) state This device is the logic implementation 2-pole 4-position switch where the position of the switch is determined by the logic levels supplied to the two select inputs The logic equations for the outputs are shown below Za e OEa Zb e OEb S0) If the outputs of TRI-STATE devices are tied together all but one device must be in the high impedance state to avoid high currents that would exceed the maximum ratings Designers should ensure that Output Enable signals to TRISTATE devices whose outputs are tied together are designed so that there is no overlap

Select Inputs S1 I0 Data Inputs I2 I3 Output Enable OE Output

Address inputs S0 and S1 are common to both sections H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Z e 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

Absolute Maximum Ratings (Note 1) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications

Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias Plastic VCC Pin Potential to Ground Pin Input Voltage (Note 2) Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC e 0V) Standard Output TRI-STATE Output

Current Applied to Output in LOW State (Max) ESD Last Passing Voltage (Min)

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

Free Air Ambient Temperature Military Commercial Supply Voltage Military Commercial

Symbol VIH VIL VCD VOH Parameter Min Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage 54F 10% VCC 54F 10% VCC 74F 10% VCC 74F 10% VCC 74F 5% VCC 74F 5% VCC 54F 10% VCC 74F 10% VCC 54F 74F

Conditions Recognized as a HIGH Signal Recognized as a LOW Signal

Output LOW Voltage Input HIGH Current Input HIGH Current Breakdown Test Output HIGH Leakage Current Input Leakage Test Output Leakage Circuit Current Input LOW Current

VOUT e VCC IID 9 mA All Other Pins Grounded VIOD 150 mV All Other Pins Grounded VIN 0 5V VOUT 2 7V VOUT 0 5V VOUT e 0V VOUT e 0V VOUT e VCC VO e HIGH VO e LOW VO e HIGH Z

Output Leakage Current Output Leakage Current Output Short-Circuit Current Bus Drainage Test Power Supply Current Power Supply Current Power Supply Current



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