MM74C221

Features:

 Wide supply voltage range: 4.5V to 15V
 Guaranteed noise margin: 1.0V
 High noise immunity: 0.45 V_CC (typ.)
 Low power TTL compatibility: fan out of 2 driving 74L


Specifications

Voltage at Any Pin                                  -0.3V to V_CC + 0.3V
Operating Temperature Range                    -40°C to +85°C
Storage Temperature Range                     -65°C to +150°C
Power Dissipation
Dual-In-Line                                                            700 mW
Small Outline                                                           500 mW
Operating V_CC Range                                        4.5V to 15V
Absolute Maximum V_CC                                                 18V
R_EXT 80 V_CC (W)
Lead Temperature
(Soldering, 10 seconds)                                            260°C


Description

   The MM74C221 dual monostable multivibrator is a monolithic complementary MOS integrated circuit. Each multivibrator features a negative-transition-triggered input and a positive-transition-triggered input, either of which can be used as an inhibit input, and a clear input.

   Once fired, the output pulses of MM74C221 are independent of further transitions of the A and B inputs and are a function of the external timing components C_EXT and R_EXT. The pulse width is stable over a wide range of temperature and V_CC.

   Pulse stability of MM74C221 will be limited by the accuracy of external timing components. The pulse width is approximately defined by the relationship tW(OUT) » CEXT REXT. For further information and applications, see AN-138.