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參數(shù)資料
| 型號： | SY100E136JZTR |
| 廠商： | MICREL INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | 6-BIT UNIVERSAL UP/DOWN COUNTER |
| 中文描述： | 100E SERIES, SYN POSITIVE EDGE TRIGGERED 6-BIT BIDIRECTIONAL BINARY COUNTER, PQCC28 |
| 封裝： | LEAD FREE, PLASTIC, LCC-28 |
| 文件頁數(shù)： | 8/9頁 |
| 文件大?。?/td> | 107K |
| 代理商： | SY100E136JZTR |
8
SY10E136
SY100E136
Micrel, Inc.
M9999-032006
hbwhelp@micrel.com or (408) 955-1690
Figure 4. Programmable Divider Waveforms
Figure 5. 24-bit Programmable Divider Architecture
The exercise of building a programmable divider then
becomes simply determining what value to load into the
counter to accomplish the desired division. Since the load
operation requires a clock pulse, to divide by N, N-1 must
be loaded into the counter. A single E136 device is capable
of divide ratios of 2 to 64, inclusive. Table 1 outlines the
load values for the various divide ratios. Figure 4 presents
the waveforms resulting from a divide by 37 operation. Note
that the availability of the C
OUT
complimentary output (C
OUT
)
allows the user to choose the polarity of the divide by output.
For single device programmable counters, the E016
counter is probably a better choice than the E136. The
E016 has an internal feedback to control the reloading of
the counter. This not only simplifies board design, but also
will result in a faster maximum count frequency.
For programmable dividers of larger than 8 bits, the
benefits of the E016 diminishes and, in fact, for very wide
dividers, the E136 will provide the capability of a faster
count frequency. Figure 5 shows the architecture of a 24-
bit programmable divider implemented using E136 counters.
Note the need for one external gate to control the loading of
the entire counter chain. An ideal device for the external
gating of this architecture would be the 4-input OR function
in the 8-lead SOIC ECLinPS Lite
family. However, the
final decision as to what device to use for external gating
requires a balancing of performance needs, cost and
available board space. Note that because of the need for
external gating, the maximum count frequency of a given
sized programmable divider will be less than that of a single
cascaded counter.
CLOCK
C
OUT
S1
LOAD
100100
100011
000011
000010
000001
000000
LOAD
DIVIDE BY 37
CLK
C
IN
CL
IN
CLOCK
"LO"
"LO"
LSB
Q
0
–
Q
5
D0
–
D5
"LO"
Q
0
–
Q
5
D0
–
D5
Q
0
–
Q
5
D0
–
D5
MSB
Q
0
–
Q
5
D0
–
D5
S
1
CLK
CLK
CLK
S
1
S
1
S
1
C
OUT
CL
OUT
C
IN
CL
IN
C
OUT
CL
OUT
C
IN
CL
IN
C
OUT
CL
OUT
C
IN
CL
IN
C
OUT
CL
OUT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SY100E137 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:8-BIT RIPPLE COUNTER |
| SY100E137JC | 功能描述:IC COUNTER RIPPLE 8-BIT 28-PLCC RoHS:否 類別:集成電路 (IC) >> 邏輯 -計數(shù)器，除法器 系列:100E 產(chǎn)品變化通告:1Q2012 Discontinuation 30/Mar/2012 標(biāo)準(zhǔn)包裝:2,500 系列:74HC 邏輯類型:二進制計數(shù)器 方向:上 元件數(shù):1 每個元件的位元數(shù):12 復(fù)位:異步 計時:- 計數(shù)速率:50MHz 觸發(fā)器類型:負邊沿 電源電壓:2 V ~ 6 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| SY100E137JCTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:8-BIT RIPPLE COUNTER |
| SY100E137JZ | 功能描述:計數(shù)器移位寄存器 8-bit Ripple Counter RoHS:否 制造商:Texas Instruments 計數(shù)器類型: 計數(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 傳播延遲時間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| SY100E137JZ TR | 功能描述:計數(shù)器移位寄存器 8-bit Ripple Counter RoHS:否 制造商:Texas Instruments 計數(shù)器類型: 計數(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 傳播延遲時間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
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