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參數(shù)資料
| 型號(hào)： | 74HC4538A |
| 廠商： | Motorola, Inc. |
| 元件分類： | 參考電壓二極管 |
| 英文描述： | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
| 中文描述： | 250 的低電流運(yùn)算，低反向泄露，低噪聲穩(wěn)壓二極管 |
| 文件頁(yè)數(shù)： | 8/13頁(yè) |
| 文件大?。?/td> | 368K |
| 代理商： | 74HC4538A |
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MC54/74HC4538A
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
3–8
PIN DESCRIPTIONS
INPUTS
A1, A2 (Pins 4, 12)
Positive–edge trigger inputs. A rising–edge signal on
either of these pins triggers the corresponding multivibrator
when there is a high level on the B1 or B2 input.
B1, B2 (Pins 5, 11)
Negative–edge trigger inputs. A falling–edge signal on
either of these pins triggers the corresponding multivibrator
when there is a low level on the A1 or A2 input.
Reset 1, Reset 2 (Pins 3, 13)
Reset inputs (active low). When a low level is applied to
one of these pins, the Q output of the corresponding multi-
vibrator is reset to a low level and the Q output is set to a high
level.
CX1/RX1 and CX2/RX2 (Pins 2 and 14)
External timing components. These pins are tied to the
common points of the external timing resistors and capaci-
tors (see the Block Diagram). Polystyrene capacitors are
recommended for optimum pulse width control. Electrolytic
capacitors are not recommended due to high leakages
associated with these type capacitors.
GND (Pins 1 and 15)
External ground. The external timing capacitors discharge
to ground through these pins.
OUTPUTS
Q1, Q2 (Pins 6, 10)
Noninverted monostable outputs. These pins (normally
low) pulse high when the multivibrator is triggered at either
the A or the B input. The width of the pulse is determined by
the external timing components, RX and CX.
Q1, Q2 (Pins 7, 9)
Inverted monostable outputs. These pins (normally high)
pulse low when the multivibrator is triggered at either the A or
the B input. These outputs are the inverse of Q1 and Q2.
LOGIC DETAIL
(1/2 THE DEVICE)
+
–
+
–
Figure 9.
RxCx
VCC
M1
2 k
M3
M2
A
B
RESET
POWER
ON
RESET
RESET LATCH
TRIGGER CONTROL
RESET CIRCUIT
TRIGGER CONTROL
CIRCUIT
OUTPUT
LATCH
UPPER
REFERENCE
CIRCUIT
Vre, UPPER
LOWER
REFERENCE
CIRCUIT
Vre, LOWER
Q
Q
C
CB
Q
R
VCC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74HC4538D | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL MONO RETRIG PRECISION RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時(shí)間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| 74HC4538D(BJ) | 功能描述:DUAL PRECISION MONOMULTIVIBRATOR 制造商:toshiba semiconductor and storage 系列:74HC 零件狀態(tài):在售 邏輯類型:單穩(wěn)態(tài) 獨(dú)立電路:2 施密特觸發(fā)器輸入:是 傳播延遲:25ns 電流 - 輸出高，低:5.2mA，5.2mA 電壓 - 電源:2V ~ 6V 工作溫度:-40°C ~ 125°C（TA） 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:16-SOIC 標(biāo)準(zhǔn)包裝:1 |
| 74HC4538D,652 | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL MONO RETRIG RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時(shí)間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| 74HC4538D,653 | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL RETRIG PRECISION MONOSTAT RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時(shí)間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| 74HC4538D | 制造商:NXP Semiconductors 功能描述:74HC CMOS SMD 74HC4538 SOIC16 |
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