器件名称: 74121
功能描述: One-Shot with Clear and Complementary Outputs
文件大小: 69.03KB 共5页
简 介:DM74121 One-Shot with Clear and Complementary Outputs
June 1989 Revised November 1999
DM74121 One-Shot with Clear and Complementary Outputs
General Description
The DM74121 is a monostable multivibrator featuring both positive and negative edge triggering with complementary outputs. An internal 2k timing resistor is provided for design convenience minimizing component count and layout problems. this device can be used with a single external capacitor. Inputs (A) are active-LOW trigger transition inputs and input (B) is and active-HIGH transition Schmitttrigger input that allows jitter-free triggering from inputs with transition rates as slow as 1 volt/second. A high immunity to VCC noise of typically 1.5V is also provided by internal circuitry at the input stage. To obtain optimum and trouble free operation please read operating rules and one-shot application notes carefully and observe recommendations.
Features
s Triggered from active-HIGH transition or active-LOW transition inputs s Variable pulse width from 30 ns to 28 seconds s Jitter free Schmitt-trigger input s Excellent noise immunity typically 1.2V s Stable pulse width up to 90% duty cycle s TTL, DTL compatible s Compensated for VCC and temperature variations s Input clamp diodes
Ordering Code:
Order Number DM74121N Package Number N14A Package Description 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagram
Function Table
Inputs A1 L X X H H ↓ ↓ L X A2 X L X H ↓ H ↓ X L B H H L……
