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| MC54/74F538 1-OF-8 DECODER WITH 3-STATE OUTPUTS The MC54 / 74F538 decoder/demultiplexer accepts three Address (A0 - A2) input signals and decodes them to select one of eight mutually exclusive outputs. A polarity control input (P) determines whether the outputs are active LOW or active HIGH. A HIGH Signal on either of the active LOW Output Enable (OE) inputs forces all outputs to the high impedance state. Two active HIGH and two active LOW input enables are available for easy expansion to 1-of-32 decoding with four packages, or for data demultiplexing to 1-of-8 or 1-of-16 destinations. 1-OF-8 DECODER WITH 3-STATE OUTPUTS FASTTM SCHOTTKY TTL * * * * * Output Polarity Control Data Demultiplexing Capability Multiple Enables for Expansion 3-State Outputs ESD Protection > 4000 Volts CONNECTION DIAGRAM DIP (TOP VIEW) VCC O3 20 19 O4 18 A2 17 E1 16 E2 15 E3 14 E4 13 P 12 O7 11 20 1 J SUFFIX CERAMIC CASE 732-03 20 1 N SUFFIX PLASTIC CASE 738-03 1 O2 2 O1 3 O0 4 5 6 A0 7 A1 8 O5 9 10 20 1 DW SUFFIX SOIC CASE 751D-03 OE1 OE2 O6 GND ORDERING INFORMATION LOGIC DIAGRAM A2 A1 A0 E1 E2 E3 E4 16 15 14 13 4 5 OE1 OE2 O0 O1 O2 O3 O4 O5 O6 O7 E1 E2 E3 E4 OE1 OE2 O0 O1 O2 O3 O4 O5 O6 O7 3 2 1 14 18 VCC = PIN 20 GND = PIN 10 8 9 11 MC54FXXXJ Ceramic MC74FXXXN Plastic MC74FXXXDW SOIC LOGIC SYMBOL 12 P 6 A0 7 17 A1 A2 P Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. FAST AND LS TTL DATA 4-206 MC54/74F538 GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range 74 Output Current -- High Output Current -- Low 54, 74 54, 74 0 25 70 - 3.0 24 Parameter 54, 74 54 Min 4.5 - 55 Typ 5.0 25 Max 5.5 125 Unit V C mA mA DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol VIH VIL VIK VOH VOL IOZH IOZL IIH IIL IOS ICCZ Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage 54, 74 Output HIGH Voltage 74 Output LOW Voltage Output OFF Current -- HIGH Output OFF Current -- LOW Input HIGH Current 0.1 Input LOW Current Output Short Circuit Current (Note 2) Power Supply Current - 60 37 - 0.6 -150 56 2.7 0.5 50 - 50 20 V V A A A mA mA mA mA 2.4 Min 2.0 0.8 - 1.2 Typ Max Unit V V V V Test Conditions Guaranteed Input HIGH Voltage Guaranteed Input LOW Voltage VCC = MIN, IIN = - 18 mA IOH = - 3.0 mA IOH = - 3.0 mA IOL = 24 mA VOUT = 2.7 V VOUT = 0.5 V VCC = 4.5 V VCC = 4.75 V VCC = MIN VCC = MAX VCC = MAX VCC = MAX, VIN = 2.7 V VCC = MAX, VIN = 7.0 V VCC = MAX, VIN = 0.5 V VCC = MAX, VOUT = 0 V VCC = MAX: A0 - A2, E1, E2 = GND OE1, OE2, E3, E4, P = HIGH AC CHARACTERISTICS 54 / 74F TA = + 25C VCC = + 5.0 V CL = 50 pF Symbol tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Propagation Delay An to On Propagation Delay E1 or E2 to On Propagation Delay E3 or E4 to On Propagation Delay P to On Output Enable Time OE1 or OE2 to On Output Disable Time OE1 or OE2 to On Min 4.0 3.0 4.0 3.0 6.5 4.0 4.5 3.5 2.5 4.0 1.0 1.0 Typ 11 7.5 8.5 6.5 11 10 11.5 11 5.5 9.0 4.0 5.0 Max 13 12.5 12 12 12.5 12.5 15 11.5 9.5 13.5 6.0 8.5 54F TA = -55 to +125C VCC = 5.0 V 10% CL = 50 pF Min 4.0 3.0 3.5 3.0 5.5 3.5 4.0 3.5 2.0 4.0 1.0 1.0 Max 17 16.5 15 14.5 15.5 15 18.5 12.5 13 16 8.0 10.5 74F TA = 0 to 70C VCC = 5.0 V 10% CL = 50 pF Min 4.0 3.0 3.5 3.0 5.5 3.5 4.0 3.5 2.0 4.0 1.0 1.0 Max 14 13.5 ns 13 12.5 13.5 13 ns 16.5 12 11 15 ns 7.0 9.5 Unit FAST AND LS TTL DATA 4-207 MC54/74F538 TRUTH TABLE INPUTS FUNCTION OE1 High Impedance H X L L L L L L L L L L L L L L L L L L L L OE2 X H L L L L L L L L L L L L L L L L L L L L E1 X X H X X X L L L L L L L L L L L L L L L L E2 X X X H X X L L L L L L L L L L L L L L L L E3 X X X X L X H H H H H H H H H H H H H H H H E4 X X X X X L H H H H H H H H H H H H H H H H A2 X X X X X X L L L L H H H H L L L L H H H H A1 X X X X X X L L H H L L H H L L H H L L H H A0 X X X X X X L H L H L H L H L H L H L H L H H L L L L L L L L H H H H H H H L H L L L L L L H L H H H H H H O0 Z Z O1 Z Z O2 Z Z O3 Z Z O4 Z Z O5 Z Z O6 Z Z O7 Z Z OUTPUTS Disable Outputs Equal P Input Active HIGH Output (P = L) L L H L L L L L H H L H H H H H L L L H L L L L H H H L H H H H L L L L H L L L H H H H L H H H L L L L L H L L H H H H H L H H L L L L L L H L H H H H H H L H L L L L L L L H H H H H H H H L Active LOW Output (P = H) H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High Impedance FAST AND LS TTL DATA 4-208 |
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