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Description of TTL, ECL and CMOS Glue Logic Families:

Device Families:

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 levels    
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)                     Fast - CMOS - TTL inputs (speed variations)
74FCT (-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

   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            
74GTL                               Gunning - Transceiver - Logic              
74GTLP                            GTL Plus                               

   Low Voltage Families

74ALB                             Advanced - Low Voltage - BiCMOS                
74LV (U)                          Low - Voltage (Unbuffered output)          
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) 
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 & 5v supplies) 
74VCX                              LV - CMOS (operates with 1.8v & 3.6v supplies

4000                                 True CMOS (non-TTL levels)             

  ECL Device Families:

MEC I                                8nS*               
MEC II                              2nS*                   
MEC III                            (16XX)  1nS*  .......* = Rise & Fall Times 
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* 
100xxx                            100K, temperature compensated                  
100Hxxx                          100K - High speed, temperature compensated 
100Exxx                          100K - ECLinPS, temp, voltage comp., 800pS*

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