參數(shù)資料
型號: MC14516BDR2
廠商: ON Semiconductor
文件頁數(shù): 8/10頁
文件大?。?/td> 0K
描述: IC COUNTER BINARY UP/DOWN 16SOIC
產(chǎn)品變化通告: Product Obsolescence 11/Feb/2009
標(biāo)準(zhǔn)包裝: 2,500
系列: 4000B
邏輯類型: 二進制計數(shù)器
方向: 上,下
元件數(shù): 1
每個元件的位元數(shù): 4
復(fù)位: 異步
計時: 同步
計數(shù)速率: 8MHz
觸發(fā)器類型: 正邊沿
電源電壓: 3 V ~ 18 V
工作溫度: -55°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-SOIC
包裝: 帶卷 (TR)
MC14516B
http://onsemi.com
7
Figure 3. Presettable Cascaded 8Bit Up/Down Counter
NOTE: The Least Significant Digit (L.S.D.) counts from a preset value once Preset Enable (PE) goes low. The Most Significant
Digit (M.S.D.) is disabled while Cin is high. When the count of the L.S.D. reaches 0 (count down mode) or reaches 15 (count
up mode), Cout goes low for one complete clock cycle, thus allowing the next counter to decrement/increment one count.
(See Timing Diagram) The L.S.D. now counts through another cycle (15 clock pulses) and the above cycle is repeated.
L.S.D.
MC14516B
Cout
Q0
Q1
Q2
Q3
P0
P1
P2
P3
PE
R
U/D
CLOCK
Cin
M.S.D.
MC14516B
Cout
Q0
Q1
Q2
Q3
P0
P1
P2
P3
PE
R
U/D
CLOCK
Cin
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
TERMINAL COUNT
INDICATOR
P0
P1
P2
P3
P4
P5
P6
P7
THUMBWHEEL SWITCHES
(OPEN FOR “0")
+VDD
OPEN = COUNT
CLOCK
RESET
RESISTORS = 10 k
W
0 = COUNT
1 = PRESET
1 = UP
0 = DOWN
PRESET
ENABLE
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