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參數(shù)資料
| 型號(hào)： | DM9370 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | 7-Segment Decoder/Driver/Latch with Open-Collector Outputs(集電極開路輸出的7段譯碼器/驅(qū)動(dòng)器/鎖存器) |
| 中文描述： | SEVEN SEGMENT DECODER/DRIVER, INVERTED OUTPUT, PDIP16 |
| 封裝： | 0.300 INCH, PLASTIC, MS-001, DIP-16 |
| 文件頁數(shù)： | 2/5頁 |
| 文件大?。?/td> | 58K |
| 代理商： | DM9370 |
www.fairchildsemi.com
2
D
Truth Table
*The RBI will blank the display only if binary zero is stored in the latches.
**RBO used as an input overdrives all other input conditions.
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Functional Description
The DM9370 has active LOW outputs capable of sinking in
excess of 25 mA which allows it to drive a wide variety of 7-
segment incandescent displays directly. It may also be
used to drive common anode LED displays, multiplexed or
directly with the aid of suitable current limiting resistors.
This device accepts a 4-bit binary code and produces out-
put drive to the appropriate segments of the 7-segment dis-
play. It has a hexadecimal decode format which produces
numeric codes “0” through “9” and alpha codes “A” through
“F” using upper and lower case fonts.
Latches on the four data inputs are controlled by an active
LOW latch enable LE. When the LE is LOW, the state of
the outputs is determined by the input data. When the LE
goes HIGH, the last data present at the inputs is stored in
the latches and the outputs remain stable. The LE pulse
width necessary to accept and store data is typically 30 ns
which allows data to be strobed into the DM9370 at normal
TTL speeds. This feature means that data can be routed
directly from high speed counters and frequency dividers
into the display without slowing down the system clock or
providing intermediate data storage.
The latch/decoder combination is a simple system which
drives incandescent displays with multiplexed data inputs
from MOS time clocks, DVMs, calculator chips, etc. Data
inputs are multiplexed while the displays are in static mode.
This lowers component and insertion costs since several
circuits—seven diodes per display, strobe drivers, a sepa-
rate display voltage source, and clock failure detect cir-
cuits—traditionally found in incandescent multiplexed
display systems are eliminated. It also allows low strobing
rates to be used without display flicker.
Another DM9370 feature is the reduced loading on the
data inputs when the Latch Enable is HIGH (only 10
μ
A
typ). This allows many DM9370s to be driven from a MOS
device in multiplex mode without the need for drivers on
the data lines. The DM9370 also provides automatic blank-
ing of the leading and/or trailing-edge zeroes in a multidigit
decimal number, resulting in an easily readable decimal
display conforming to normal writing practice. In an 8-digit
mixed integer fraction decimal representation, using the
automatic blanking capability, 0060.0300 would be dis-
played as 60.03. Leading-edge zero suppression is
obtained by connecting the Ripple Blanking Output (RBO)
of a decoder to the Ripple Blanking Input (RBI) of the next
lower stage device. The most significant decoder stage
should have the RBI input grounded; and since suppres-
sion of the least significant integer zero in a number is not
usually desired, the RBI input of this decoder stage should
be left open. A similar procedure for the fractional part of a
display will provide automatic suppression of trailing-edge
zeroes. The RBO terminal of the decoder can be OR-tied
with a modulating signal via an isolating buffer to achieve
pulse duration intensity modulation. A suitable signal can
be generated for this purpose by forming a variable fre-
quency multivibrator with a cross coupled pair of TTL or
DTL gates.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DM9370N | Decoder/Driver |
| DM9374 | 7-Segment Decoder/Driver/Latch with Constant Current Sink Outputs(恒流耗散輸出的7段顯示譯碼器/驅(qū)動(dòng)器/鎖存器) |
| DM9374N | 7-Segment Decoder/Driver/Latch with Constant Current Sink Outputs |
| DM93L14 | Quad Latch(四鎖存器) |
| DM93L14N | Quad Latch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DM9370N | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 7-Seg Dec/Drv/Latch RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| DM9374 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:7-Segment Decoder/Driver/Latch with Constant Current Sink Outputs |
| DM9374N | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 7-Seg Dec/Drv/Latch RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| DM9386 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:4-Bit Quad Exclusive-NOR with Open-Collector Outputs |
| DM93L00 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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