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參數(shù)資料
| 型號： | SY100E136JZ TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COUNTER UP/DOWN 6BIT 28-PLCC |
| 標(biāo)準(zhǔn)包裝： | 750 |
| 系列： | 100E |
| 邏輯類型： | 二進(jìn)制計數(shù)器 |
| 方向： | 上，下 |
| 元件數(shù)： | 1 |
| 每個元件的位元數(shù)： | 6 |
| 復(fù)位： | 異步 |
| 計時： | 同步 |
| 計數(shù)速率： | 650MHz |
| 觸發(fā)器類型： | 正邊沿 |
| 電源電壓： | 4.2 V ~ 5.5 V |
| 工作溫度： | 0°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-LCC（J 形引線） |
| 供應(yīng)商設(shè)備封裝： | 28-PLCC |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | SY100E136JZTR SY100E136JZTR-ND |
6
SY10E136
SY100E136
Micrel, Inc.
M9999-032006
hbwhelp@micrel.com or (408) 955-1690
LOGIC DIAGRAM
APPLICATIONS INFORMATION
Overview
The SY10E/100E136 are 6-bit synchronous, presettable,
cascadable universal counters. Using the S1 and S2 control
pins, the user can select between preset, count up, count
down and hold count. The Master Reset pin will reset the
internal counter and set the COUT, CLOUT and CLIN flip-
flops.
Unlike previous 136-type counters, the carry-out
outputs will go to a high state during the preset operation.
In addition, since the carry-out outputs are registered, they
will not go low if terminal count is loaded into the register.
The look-ahead-carry-out output functions similarly.
Note from the schematic the use of the master information
from the least significant bits for control of the two carry-out
functions. This architecture not only reduces the carry-out
delay, but is essential to incorporate the registered carry-
out functions. In addition to being faster, the resulting carry-
out signals are stable and glitch free because these functions
are registered.
Cascading Multiple E136 Devices
Many applications require counters significantly larger than
the 6 bits available with the E136. For these applications,
several E136 devices can be cascaded to increase the bit
width of the counter to meet the needs of the application.
In the past, cascading several 136-type universal counters
necessarily impacted the maximum count frequency of the
resulting counter chain. This performance impact was the
result of the terminal count signal of the lower order counters
Figure 1. 24-bit Cascaded E136 Counter
having to ripple through the entire counter chain.
As a
result, past counters of this type were not widely used in
large bit counter applications.
An alternative counter architecture similar to the E016
binary counter was implemented to alleviate the need to
ripple propagate the terminal count signal. Unfortunately,
these types of counters require external gating for cascading
designs of more than two devices. In addition to requiring
additional components, these external gates limit the
cascaded count frequency to a value less than the free
running count frequency of a single counter. Although there
is a performance impact with this type of architecture, it is
minor compared to the impact of the ripple propagate
designs. As a result, the E016-type counters have been
used extensively in applications requiring very high speed,
wide bit width synchronous counters.
Several improvements have been incorporated to past
universal counter designs in the E136 universal counter.
These enhancements make the E136 the unparalleled leader
in its class. With the addition of look-ahead-carry features
on the terminal count signal, very large counter chains can
be designed which function at very nearly the same clock
frequency as a single free running device. More importantly,
these counter chains require no external gating. Figure 1
below illustrates the interconnect scheme for using the look-
ahead-carry features of the E136 counter.
CLK
CIN
CLIN
CLOCK
"LO"
COUT
LSB
Q0 – Q5
"LO"
MSB
CLK
COUT
CLOUT
111101
111110
111111
Q0 – Q5
CLOUT
D0 – D5
CIN
CLIN
COUT
CLOUT
CIN
CLIN
COUT
CLOUT
CIN
CLIN
COUT
CLOUT
CLK
000001
000000
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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(jìn)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(fù)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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