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參數(shù)資料
| 型號(hào)： | MC74HC390 |
| 廠商： | Motorola, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual 4-Stage Binary Ripple Counter with ±2and ±5 Sections |
| 中文描述： | 雙4位的二進(jìn)制紋波計(jì)數(shù)器具有± 2and ± 5節(jié) |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大小： | 216K |
| 代理商： | MC74HC390 |
MC54/74HC390
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
4
PIN DESCRIPTIONS
INPUTS
Clock A (Pins 1, 15) and Clock B (Pins 4, 15)
Clock A is the clock input to the
÷
2 counter; Clock B is the
clock input to the
÷
5 counter. The internal flip–flops are
toggled by high–to–low transitions of the clock input.
CONTROL INPUTS
Reset (Pins 2, 14)
Asynchronous reset. A high at the Reset input prevents
counting, resets the internal flip–flops, and forces QA through
QD low.
OUTPUTS
QA (Pins 3, 13)
Output of the
÷
2 counter.
QB, QC, QD (Pins 5, 6, 7, 9, 10, 11)
Outputs of the
÷
5 counter. QD is the most significant bit.
QA is the least significant bit when the counter is connected
for BCD output as in Figure 4. QB is the least significant bit
when the counter is operating in the bi–quinary mode as in
Figure 5.
SWITCHING WAVEFORMS
Q
tr
tf
tPLH
tPHL
tTLH
tTHL
VCC
GND
CLOCK
10%
10%
50%
1/fmax
tw
trec
RESET
Figure 1.
Figure 2.
VCC
GND
VCC
GND
10%
90%
Q
CLOCK
50%
50%
50%
tPHL
tw
TEST CIRCUIT
* Includes all probe and jig capacitance
CL*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
Figure 3.
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| MC74HC390AD | 功能描述:計(jì)數(shù)器移位寄存器 2-6V Dual 4-Stage RoHS:否 制造商:Texas Instruments 計(jì)數(shù)器類型: 計(jì)數(shù)順序:Serial to Serial/Parallel 電路數(shù)量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數(shù)量:1 輸出類型:Open Drain 傳播延遲時(shí)間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| MC74HC390ADG | 功能描述:計(jì)數(shù)器移位寄存器 LOG CMOS COUNTER 4STAGE RoHS:否 制造商:Texas Instruments 計(jì)數(shù)器類型: 計(jì)數(shù)順序:Serial to Serial/Parallel 電路數(shù)量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數(shù)量:1 輸出類型:Open Drain 傳播延遲時(shí)間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| MC74HC390ADR2 | 功能描述:計(jì)數(shù)器移位寄存器 2-6V Dual 4-Stage RoHS:否 制造商:Texas Instruments 計(jì)數(shù)器類型: 計(jì)數(shù)順序:Serial to Serial/Parallel 電路數(shù)量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數(shù)量:1 輸出類型:Open Drain 傳播延遲時(shí)間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| MC74HC390ADR2G | 功能描述:計(jì)數(shù)器移位寄存器 2-6V Dual 4-Stage Binary w/Divide-by-2 RoHS:否 制造商:Texas Instruments 計(jì)數(shù)器類型: 計(jì)數(shù)順序:Serial to Serial/Parallel 電路數(shù)量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數(shù)量:1 輸出類型:Open Drain 傳播延遲時(shí)間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| MC74HC390ADT | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
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