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| (R) FAST CMOS 1-OF-8 DECODER WITH ENABLE DESCRIPTION: IDT54/74FCT138 IDT54/74FCT138A IDT54/74FCT138C Integrated Device Technology, Inc. FEATURES: * * * * * * * * * * * * * IDT54/74FCT138 equivalent to FASTTM speed IDT54/74FCT138A 35% faster than FAST IDT54/74FCT138C 40% faster than FAST Equivalent to FAST speeds output drive over full temperature and voltage supply extremes IOL = 48mA (commercial) and 32mA (military) CMOS power levels (1mW typ. static) TTL input and output level compatible CMOS output level compatible Substantially lower input current levels than FAST (5A max.) JEDEC standard pinout for DIP and LCC Product available in Radiation Tolerant and Radiation Enhanced versions Military product compliant to MIL-STD-883, Class B Standard Military Drawing # 5962-87654 is listed on this function. Refer to section 2. The IDT54/74FCT138/A/C are 1-of-8 decoders built using an advanced dual metal CMOS technology. The IDT54/ 74FCT138/A/C accept three binary weighted inputs (A0, A1, A2) and, when enabled, provide eight mutually exclusive active LOW outputs (O0 - O7). The IDT54/74FCT138/A/C feature three enable inputs, two active LOW (E1, E2) and one active HIGH (E3). All outputs will be HIGH unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four IDT54/74FCT138/A/C devices and one inverter. FUNCTIONAL BLOCK DIAGRAM A2 A1 A0 E1 E2 E3 PIN CONFIGURATIONS A0 A1 A2 E1 E2 E3 O7 GND 1 2 3 4 5 6 7 8 16 15 P16-1, D16-1, SO16-1 & E16-1 14 13 12 11 10 9 Vcc O0 O1 O2 O3 O4 O5 O6 DIP/SOIC/CERPACK TOP VIEW INDEX O7 O6 O5 O4 O3 O2 O1 O0 2581 drw 02 A2 E1 NC E2 E3 A1 A0 NC Vcc O0 3 4 5 6 7 8 2 1 20 19 18 17 16 15 14 9 10 11 12 13 L20-2 O1 O2 NC O3 O4 2581 drw 01 The IDT logo is a registered trademark of Integrated Device Technology, Inc. FAST is a trademark of National Semiconductor Co. MILITARY AND COMMERCIAL TEMPERATURE RANGES (c)1992 Integrated Device Technology, Inc. O7 GND NC O6 O5 LCC TOP VIEW MAY 1992 DSC-4625/3 7.3 1 IDT54/74FCT138/A/C FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES PIN DESCRIPTION Pin Names A0-A2 Address Inputs Enable Inputs (Active LOW) Enable Input (Active HIGH) Outputs (Active LOW) 2581 tbl 05 Description E1, E2 E3 O0-O7 FUNCTION TABLE Inputs Outputs A0 X X X L H L H L H L H A1 X X X L L H H L L H H A2 X X X L L L L H H H H E1 H X X L L L L L L L L E2 X H X L L L L L L L L E3 X X L H H H H H H H H O0 H H H L H H H H H H H O1 H H H H L H H H H H H O2 H H H H H L H H H H H O3 H H H H H H L H H H H O4 H H H H H H H L H H H O5 H H H H H H H H L H H O6 H H H H H H H H H L H O7 H H H H H H H H H H L 2581 tbl 06 ABSOLUTE MAXIMUM RATINGS(1) Symbol Rating VTERM(2) Terminal Voltage with Respect to GND VTERM(3) Terminal Voltage with Respect to GND TA Operating Temperature TBIAS Temperature Under Bias TSTG Storage Temperature PT Power Dissipation DC Output Current IOUT Commercial Military Unit -0.5 to +7.0 -0.5 to +7.0 V CAPACITANCE (TA = +25C, f = 1.0MHz) Symbol CIN COUT Parameter(1) Input Capacitance Conditions VIN = 0V Typ. Max. Unit 6 8 10 12 pF pF 02 Output Capacitance VOUT = 0V -0.5 to VCC -0.5 to VCC V NOTE: 2581 tbl 1. This parameter is guaranteed characterization data and not tested. 0 to +70 -55 to +125 -55 to +125 0.5 120 -55 to +125 -65 to +135 -65 to +150 0.5 120 C C C W mA NOTES: 2581 tbl 01 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. Inputs and VCC terminals only. 3. Outputs and I/O terminals only. 7.3 2 IDT54/74FCT138/A/C FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: VLC = 0.2V; VHC = VCC - 0.2V Commercial: TA = 0C to +70C, VCC = 5.0V 5%; Military: TA = -55C to +125C, VCC = 5.0V 10% Symbol VIH VIL IIH IIL VIK IOS VOH Parameter Input HIGH Level Input LOW Level Input HIGH Current Input LOW Current Clamp Diode Voltage Short Circuit Current Output HIGH Voltage Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VI = VCC VI= 2.7V VI= 0.5V VI = GND VCC = Min., IN = -18mA VCC = Max.(3), VO = GND VCC = 3V, VIN = VLC or VHC, IOH = -32A IOH = -300A VCC = Min. IOH = -12mA MIL. VIN = VIH or VIL IOH = -15mA COM'L. VCC = 3V, VIN = VLC or VHC, IOL = 300A IOL = 300A VCC = Min. VIN = VIH or VIL IOL = 32mA MIL. IOL = 48mA COM'L. Min. 2.0 -- -- -- -- -- -- -60 VHC VHC 2.4 2.4 -- -- -- -- Typ.(2) -- -- -- -- -- -- -0.7 -120 VCC VCC 4.3 4.3 GND GND 0.3 0.3 Max. -- 0.8 5 5(4) -5(4) -5 -1.2 -- -- -- -- -- VLC VLC(4) 0.5 0.5 Unit V V A V mA V VOL Output LOW Voltage V NOTES: 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, +25C ambient and maximum loading. 3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second. 4. This parameter is guaranteed but not tested. 2581 tbl 03 POWER SUPPLY CHARACTERISTICS VLC = 0.2V; VHC = VCC - 0.2V Symbol ICC ICC ICCD Parameter Quiescent Power Supply Current Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4) Test Conditions(1) Vcc = Max. VIN VHC; VIN VLC Vcc = Max. VIN = 3.4V(3) Vcc = Max. Outputs Open One Output Toggling 50% Duty Cycle Vcc = Max. Outputs Open Toggle E1, E2 or E3 50% Duty Cycle fO = 10MHz One Output Toggling VIN VHC VIN VLC Min. -- -- -- Typ.(2) 0.2 0.5 0.15 Max. 1.5 2.0 0.3 Unit mA mA mA/MHz IC Total Power Supply Current(5) VIN VHC VIN VLC (FCT) VIN = 3.4V VIN = GND -- 1.7 4.5 mA -- 2.0 5.5 NOTES: 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, +25C ambient. 3. Per TTL driven input (VIN = 3.4V); all other inputs at VCC or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. 5. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCP/2 + fONO) ICC = Quiescent Current ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Output Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) fO = Output Frequency NO = Number of Outputs at fO All currents are in milliamps and all frequencies are in megahertz. 2581 tbl 04 7.3 3 IDT54/74FCT138/A/C FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES SWITCHING CHARACTERISTICS OVER OPERATING RANGE IDT54/74FCT138 Com'l. Symbol tPLH tPHL tPLH tPHL tPLH tPHL Parameter Propagation Delay An to On Propagation Delay E1 or E2 to On Propagation Delay E3 to On CL = 50pF RL = 500 1.5 1.5 1.5 9.0 9.0 9.0 Mil. 1.5 1.5 1.5 12.0 12.5 12.5 IDT54/74FCT138A Com'l. 1.5 1.5 1.5 5.8 5.9 5.9 1.5 1.5 1.5 Mil. 7.8 8.0 8.0 IDT54/74FCT138C Com'l. 1.5 1.5 1.5 5.1 5.2 5.2 Mil. 1.5 1.5 1.5 6.0 6.1 6.1 ns ns ns 2581 tbl 07 Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 7.3 4 IDT54/74FCT138/A/C FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES TEST CIRCUITS AND WAVEFORMS TEST CIRCUITS FOR ALL OUTPUTS VCC 500 VIN Pulse Generator RT D.U.T. 50pF CL 500 V OUT 7.0V SWITCH POSITION Test Open Drain Disable Low Enable Low All Other Test Switch Closed Open DEFINITIONS: 2581 tbl 08 CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. SET-UP, HOLD AND RELEASE TIMES DATA INPUT t SU TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. t REM 3V 1.5V 0V 3V 1.5V 0V tH 3V 1.5V 0V 3V 1.5V 0V PULSE WIDTH LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE 1.5V 1.5V t SU tH PROPAGATION DELAY 3V 1.5V tPLH OUTPUT t PLH OPPOSITE PHASE INPUT TRANSITION tPHL 3V 1.5V 0V t PHL 0V VOH 1.5V VOL ENABLE AND DISABLE TIMES ENABLE CONTROL INPUT t PZL OUTPUT NORMALLY SWITCH LOW CLOSED t PZH OUTPUT SWITCH NORMALLY OPEN HIGH 3.5V 1.5V 0.3V t PHZ 0.3V 1.5V 0V V OH 0V t PLZ DISABLE 3V 1.5V 0V 3.5V V OL SAME PHASE INPUT TRANSITION NOTES 2581 drw 04 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. 2. Pulse Generator for All Pulses: Rate 1.0 MHz; ZO 50; tF 2.5ns; tR 2.5ns. 7.3 5 IDT54/74FCT138/A/C FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES ORDERING INFORMATION IDT XX FCT X Device Type X Package X Process Temperature Range Blank B P D SO E L 138 138A 138C 54 74 Commercial MIL-STD-883, Class B Plastic DIP CERDIP Small Outline IC CERPACK Leadless Chip Carrier 1-of-8 Decoder Fast 1-of-8 Decoder Super Fast 1-of-8 Decoder -55C to +125C 0C to +70C 2581 drw 03 7.3 6 |
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