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參數(shù)資料
| 型號： | SN54221W |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 諧振器 |
| 英文描述： | TTL/H/L SERIES, DUAL MONOSTABLE MULTIVIBRATOR, CDFP16 |
| 封裝： | CERAMIC, DFP-16 |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 352K |
| 代理商： | SN54221W |
SN54221, SN54LS221, SN74221, SN74LS221
DUAL MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SDLS213A – DECEMBER 1983 – REVISED FEBRUARY 1998
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
B
CLR
Q
3 V
0 V
VOH
VOL
≥ 50 ns
CONDITION 4: TRIGGERING FROM POSITIVE TRANSITION OF CLR
≥ 50 ns
A
CLR
Q
3 V
0 V
VOH
VOL
tw
≥ 60 ns
tPLH
tPHL
tPLH
CONDITION 5: TRIGGER FROM A, THEN CLR
A
Q
3 V
0 V
VOH
VOL
tw
CONDITION 6: TRIGGER FROM A
tw
A is low.
B and CLR are high.
NOTES: A. Input pulses are supplied by generators having the following characteristics: PRR
≤ 1 MHz, ZO ≈ 50; for SN54/74221, tr ≤ 7 ns,
tf ≤ 7 ns, for SN54/74LS221, tr ≤ 15 ns, tf ≤ 6 ns.
B. All measurements are made between the 1.5-V points of the indicated transitions for the SN54/74221 or between the 1.3-V points
for the SN54/74LS221.
Figure 1. Switching Characteristics (Continued)
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