
© 1999 Fairchild Semiconductor Corporation DS005214 www .fairchildsemi.com
Februa ry 198 4
Revised October 1999
MM74HC4049 • MM74HC4050 Hex Inverting Logic Level Down Converter • Hex Logic Level Down Converter
MM74HC4049 • MM74HC4050
Hex Inverting Logic Level Down Converter •
Hex Logic Level Down Converter
General Descript ion
The MM74HC4049 and the MM74HC4050 utilize
advanced silicon-gate CMOS technology, and have a mod-
ified input protection structure that enables these parts to
be used as logic level translators which will convert high
level logic to a low level logic while operating from th e low
logic supply. For example , 0–1 5V CMOS log ic can be con-
verted to 0–5 V logi c whe n usin g a 5V su pply. The modified
input protection has no diode connected to VCC, thus allow-
ing the input voltage to exceed the supply. The lower zener
diode protects the input from both positive and negative
static voltages. In addition each part can be used as a sim-
ple buffer or inverter without level translation. The
MM74HC4049 is pin and functionally compatible to the
CD4049BC and the MM74HC4050 is compatible to the
CD4050BC
Features
■Typical propagation delay: 8 ns
■Wide power supply range: 2V–6V
■Low quiescent supply current: 20 µA maximum (74HC)
■Fanout of 10 LS-TTL loads
Ordering Code:
Devices also available in Tape and Reel. Spe ci fy by append ing the suffix let t er “X” to the o rdering code.
Connection Diagrams
MM74HC4049 MM74HC4050
Order Num be r Packag e Num b er Packag e Desc rip ti on
MM74HC4049M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow
MM74HC4049SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MM74HC4049MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153. 4.4mm Wide
MM74HC4049N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
MM74HC4050M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow
MM74HC4050SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MM74HC4050MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153. 4.4mm Wide
MM74HC4050N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide