产品描述:
HC4538和HCT4538是适用于固定电压定时应用的双触发/重置单稳态精密多谐振荡器。外部电阻(RBX)和外部电容器(CBX)控制电路的定时和精度。调整R和C提供来自Q和Q端子的宽范围输出脉冲宽度。触发输入到输出转换的传播延迟和重置输入到输出转换的传播延迟与R和C无关。
提供前沿触发(A)和下降沿触发(B)输入,用于从输入脉冲的任一沿触发。未使用的"A"输入应绑定到GND,未使用的B应绑定到VCC。通电时,IC会重置。必须终止未使用的重置和部分。在正常操作中,电路在施加每个新的触发脉冲时重新触发。当使用前沿触发(A)时,Q连接到B,或当使用下降沿触发(B)时,Q连接到A,以在非触发模式下操作。句号(.%C分钟为0pF。产品特性:
- Retriggerable/Resettable Capability
- Trigger and Reset Propagation Delays Independent of RX, CX
- Triggering from the Leading or Trailing Edge
- Q and Q\ Buffered Outputs Available
- Separate Resets
- Wide Range of Output Pulse Widths
- Schmitt Trigger Input on A and B\ Inputs
- Retrigger Time is Independent of CX
- Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
- Wide Operating Temperature Range . . . –55°C to 125°C
- Balanced Propagation Delay and Transition Times
- Significant Power Reduction Compared to LSTTL Logic ICs
- HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
- HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il 1µA at VOL, VOH
通道数量2
供电电压(Min)(V)4.5
供电电压(Max)(V)5.5
技术系列HCT
输入类型TTL-CompatibleCMOS
输出类型推挽式
供应电流(µA)80
有效输入电压(Max)(毫安)4
IOH(Max)(毫安)-4
特性Balancedoutputs,Highspeed(tpd10-50ns),Positiveinputclampdiode,Retriggerable