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參數(shù)資料
| 型號： | MM58241V |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | MM58241 High Voltage Display Driver |
| 中文描述： | VACUUM FLUOR DISPLAY DRIVER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 150K |
| 代理商： | MM58241V |
AC Electrical Characteristics
T
A
e b
40
§
C to
a
85
§
C, V
DD
e
5V
g
0.5V
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Clock Input
Frequency
High Time
Low Time
(Notes 3 and 4)
f
C
t
H
t
L
800
kHz
ns
ns
300
300
Data Input
Set-Up Time
Hold Time
t
DS
t
DH
100
100
ns
ns
Enable Input
Set-Up Time
Hold Time
t
ES
t
EH
100
100
ns
ns
Data Output
CLOCK Low to Data Out
Time
C
L
e
50 pF
500
ns
t
CDO
Note 2:
For timing purposes, the signals ENABLE and BLANK can be considered to be totally independent of each other.
Note 3:
AC input waveform specification for test purposes: t
r
, t
f
s
20 ns, f
e
800 kHz, 50%
g
10% duty cycle.
Note 4:
Clock input rise and fall times must not exceed 5
m
s.
Connection Diagrams
Dual-In-Line Package
TL/F/5600–2
Top View
FIGURE 2
Order Number MM58241N or MM58241V
See NS Package Number N40A or V44A
Plastic Chip Carrier
TL/F/5600–8
Top View
Functional Description
This product is specifically designed to drive multiplexed or
non-multiplexed high voltage alphanumeric or dot matrix
vacuum fluorescent (VF) displays. Character generation is
done externally in the microprocessor, with a serial data
path to the display driver. The MM58421 uses three signals,
DATA IN, CLOCK and ENABLE, where ENABLE acts as an
external load signal. Display blanking can be achieved by
means of the BLANKING CONTROL input, and a logic ‘1’
will turn off all sections of the display. A block diagram of
the MM58241 is shown in Figure 1.
Figure 2 shows the pinout of the MM58241 device, where
output 1 (pin 18) is equivalent to bit 1, i.e., the first bit of data
to be loaded into the shift register following ENABLE high. A
logic ‘1’ at the input will turn on the corresponding display
digit/segment/dot output.
A significant reduction in discrete board components can be
achieved by use of the MM58241, because external pull-
down resistors are not required. Due to the nature of the
output stage, both its on and off impedance values vary as a
function of the display voltage applied. However,Figures 3a
and 3b show that this output impedance will remain con-
stant for a fixed value of display voltage.
3
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MM58242 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage Display Driver |
| MM58242V | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage Display Driver |
| MM58248 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage Display Driver |
| MM58248N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage Display Driver |
| MM58248V | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage Display Driver |
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