TTL (74xx) True TTL
74L......................Low power
74S......................Schottky
74H......................High speed
74LS....................Low power - Schottky
74AS...................Advanced - Schottky
74ALS.................Advanced - Low power - Schottky
74F(AST).............Fast - (Advanced - Schottky)
74C......................CMOS.......check Vcc level
74HC (U).............High speed - CMOS (Unbuffered output)
74HCT.................High speed - CMOS - TTL inputs
74AHC.................Advanced - High speed - CMOS
74AHCT..............Advanced - High speed - CMOS - TTL inputs
74FCT (-A,T,AT).Fast - CMOS - TTL inputs (speed variations)
74AC....................Advanced - CMOS
74ACT.................Advanced - CMOS - TTL inputs
74FACT................AC, ACT (Q) series
74ACQ.................Advanced - CMOS - Quiet outputs
74ACTQ...............Advanced - CMOS - TTL inputs - Quiet outputs
74AVC...................Advanced very low voltage CMOS
74AUC...................Advanced ultra-low voltage CMOS
74AUP...................Advanced ultra-low power

Bus Driver Families
74ABT.................Advanced - BiCMOS - Technology
74ABTE...............ABT - Enhanced Transceiver Logic
74ABTH..............Advanced - BiCMOS - Technology - bus Hold
74BCT.................BiCMOS - TTL inputs
74BTL.................Backplane - Transceiver - Logic (BiCMOS)
74CBT.................Cross Bar Technology
74CBTLV............CBT Low Voltage
74CBTK..............CBT - Active Clamp
74FB....................Futurebus+
74GTL.................Gunning - Transceiver - Logic [200MHz, Point-to-Point]
74GTLP...............GTL - Plus [120MHz, Multi-Point, Backplane]
74SSTV................Series Stub Terminated Logic
74TVC.................Translation voltage clamp

Low Voltage Families
74ALB.................Advanced - Low Voltage - BiCMOS
74LV (U)..............Low - Voltage (Unbuffered output) (CMOS)
74LVC (R) (U).....LV - CMOS (damping Resistor)(Unbuffered output)
74LVCH..............Low - Voltage - CMOS - bus Hold
74ALVC...............Advanced - Low - Voltage - CMOS
74LVT (R) (U)......LV - TTL (damping Resistor(Unbuffered output) (BiCMOS)
74LVTZ................Low - Voltage - TTL - High Impedance power-up
74ALVC (R).........ALV - CMOS (bus Hold) (damping Resistor)
74ALVCH.............Advanced - Low - Voltage - CMOS - bus Hold
74LCX..................LV - CMOS (operates with 3v and 5v supplies)
74VCX..................LV - CMOS (operates with 1.8v and 3.6v supplies
74CBTLV.............CBT - Low Voltage

4000.................True CMOS (non-TTL levels)

ECL Device Families:
MECL I.................8nS*
MECL II................2nS*
MECL III...............(16XX) 1nS* .......* = Rise & Fall Time
101xx.....................100 series 10K ECL, 3.5nS*
102xx.....................200 series 10K ECL, 2.5nS*
108xx.....................800 series 10K ECL, voltage compensated, 3.5nS*
10Hxxx..................10K - High speed, voltage compensated, 1.8nS*
10Exxx..................10K - ECLinPS, voltage compensated, 800pS*
10EPxxx................10K - ECLinPS Plus, voltage compensated, 160pS*
10ELxxx................10K - ECLinPS Lite, Single gate, voltage compensated, 275pS*
100xxx...................100K, temperature compensated
100Hxxx................100K - High speed, temperature compensated
100Exxx.................100K - ECLinPS, temp, voltage comp., 800pS*

High Speed Differential Signaling Families:

ECL.................See above
PECL.................Positive ECL, uses +5volts as Vcc; See above
LVPECL............Low Voltage PECL, uses +3.3volts as Vcc; See above
LVDS.................Low Voltage Differential Signaling, 400mV differential signal swing
CML.................Common Model Logic, 800mV differential signal swing
PCML.................Pseudo Common Model Logic, 200mV differential signal swing