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参数资料
| 型号： | 74VHC221ASJX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | MULTIVIBRATOR DUAL MONO 16SOP |
| 标准包装： | 2,000 |
| 系列： | 74VHC |
| 逻辑类型： | 单稳态 |
| 独立电路： | 2 |
| 施密特触发器输入： | 无 |
| 传输延迟： | 8.1ns |
| 输出电流高，低： | 8mA，8mA |
| 电源电压： | 2 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.209"，5.30mm 宽） |
| 供应商设备封装： | 16-SOP |
| 包装： | 带卷 (TR) |
tm
74VHC221A
Dual
Non-Retrig
g
erab
le
Monostab
le
Multivibrator
May 2007
1994 Fairchild Semiconductor Corporation
www.fairchildsemi.com
74VHC221A Rev. 1.2
74VHC221A
Dual Non-Retriggerable Monostable Multivibrator
Features
■ High Speed: tPD = 8.1ns (Typ.) at VCC = 5V
■ Low Power Dissipation: ICC = 4A (Max.) at TA = 25°C
■ Active State: ICC = 600A (Max.) at TA = 25°C
■ High Noise Immunity: VNIH = VNIL = 28% VCC (Min.)
■ Power down protection is provided on all inputs
■ Pin and function compatible with 74HC221A
General Description
The VHC221A is an advanced high speed CMOS
Monostable Multivibrator fabricated with silicon gate
CMOS technology. It achieves the high speed operation
similar to equivalent Bipolar Schottky TTL while main-
taining the CMOS low power dissipation. Each multi-
vibrator features both a negative, A, and a positive, B,
transition triggered input, either of which can be used as
an inhibit input. Also included is a clear input that when
taken LOW resets the one-shot. The VHC221A can be
triggered on the positive transition of the clear while A is
held LOW and B is held HIGH. The VHC221A is non-
retriggerable, and therefore cannot be retriggered until
the output pulse times out. The output pulse width is
determined by the equation:
PW
= (Rx)(Cx)
where,
PW is in seconds, R is in ohms, and C is in farads.
Limits for Rx and Cx are:
External capacitor, Cx: No limit
External resistors, Rx:VCC = 2.0V, 5k Min.
VCC > 3.0V, 1 k Min
An input protection circuit ensures that 0 to 7V can be
applied to the input pins without regard to the supply
voltage. This device can be used to interface 5V to 3V
systems and two supply systems such as battery back
up. This circuit prevents device destruction due to mis-
matched supply and input voltages.
Ordering Information
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the
ordering code.
Order Number
Package
Number
Package Description
74VHC221AM
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
74VHC221ASJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHC221AMTC
MTC16
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
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相关代理商/技术参数 |
参数描述 |
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| 74VHC238 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3 TO 8 LINE DECODER |
| 74VHC238_04 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3 TO 8 LINE DECODER |
| 74VHC238M | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3 TO 8 LINE DECODER |
| 74VHC238MTR | 功能描述:编码器、解码器、复用器和解复用器 3-to-8 Line Decoder RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| 74VHC238T | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3 TO 8 LINE DECODER |
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