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HD74LS221RPEL中文資料瑞薩數(shù)據(jù)手冊PDF規(guī)格書
HD74LS221RPEL規(guī)格書詳情
This multivibrator features a negative-transition-triggered input and a positive-transition-triggered input either of which can be used as an inhibit input. Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input pulse. Schmitt-trigger input circuitry (TTL hysteresis) for B input allows jitter-free triggering from inputs with transition rates as slow as 1 V/s, providing the circuit with excellent noise immunity of typically 1.2 V. A high immunity to VCC noise of typically 1.5 V is also provided by internal latching circuitry. Once fired, the outputs are independent of further transitions of the A and B inputs and are a function of the timing components, or the output pulses can be terminated by the overriding clear. Input pulses may be of any duration relative to the output pulse. Output rise and fall times are TTL compatible and independent of pulse length.
Typical triggering and clearing sequence are illustrated as a part of the switching characteristics waveforms. Pulse width stability is achieved through internal compensation and is virtually independent of VCC and temperature.
供應商 | 型號 | 品牌 | 批號 | 封裝 | 庫存 | 備注 | 價格 |
---|---|---|---|---|---|---|---|
HITACHI/日立 |
24+ |
NA/ |
33 |
優(yōu)勢代理渠道,原裝正品,可全系列訂貨開增值稅票 |
詢價 | ||
RENESAS/瑞薩 |
24+ |
SOP5.2 |
880000 |
明嘉萊只做原裝正品現(xiàn)貨 |
詢價 | ||
HD |
DIP-14 |
22 |
一級代理,專注軍工、汽車、醫(yī)療、工業(yè)、新能源、電力 |
詢價 | |||
HITACHI |
05+ |
DIP |
1350 |
詢價 | |||
HIT |
24+ |
SOP5.2MM |
90000 |
一級代理商進口原裝現(xiàn)貨、價格合理 |
詢價 | ||
HD |
2023+ |
SOP5.2 |
6895 |
原廠全新正品旗艦店優(yōu)勢現(xiàn)貨 |
詢價 | ||
HIT |
25+ |
QFP |
3200 |
全新原裝、誠信經(jīng)營、公司現(xiàn)貨銷售 |
詢價 | ||
HITACHI/日立 |
23+ |
DIP |
10000 |
原廠授權一級代理,專業(yè)海外優(yōu)勢訂貨,價格優(yōu)勢、品種 |
詢價 | ||
HIT |
24+ |
DIP |
191 |
詢價 | |||
HITACHI/日立 |
2402+ |
DIP14 |
8324 |
原裝正品!實單價優(yōu)! |
詢價 |