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参数资料
| 型号： | MM58341 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | High Voltage Display Driver |
| 中文描述： | 高电压显示驱动程序 |
| 文件页数： | 3/6页 |
| 文件大小： | 147K |
| 代理商： | MM58341 |
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
f
C
t
H
t
L
t
DS
t
DH
t
ES
t
EH
t
CDO
Clock Input Frequency
(Notes 3, 4)
800
kHz
Clock Input High Time
300
ns
Clock Input Low Time
300
ns
Data Input Setup Time
100
ns
Data Input Hold Time
100
ns
Enable Input Setup Time
100
ns
Enable Input Hold Time
100
ns
Data Output Clock Low to
Data Out Time
C
L
e
50 pF
500
ns
Note 2:
Note that, 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 purpose: t
r
s
20 ns, 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/5603–2
Top View
Order Number MM58341N
See NS Package Number N40A
Plastic Chip Carrier
TL/F/5603–8
Top View
Order Number MM58341V
See NS Package Number V44A
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 MM58341 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 MM58341 is shown in Figure 1.
Figure 2 shows the pinout of the MM58341 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 MM58341, 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.
Figure 4 demonstrates the critical timing requirements be-
tween CLOCK and DATA IN for the MM58341.
To clear (reset) the display driver at power on or any time,
the following flushing routine may be used. With the enable
signal high, clock in 32 zeroes. Drive the enable signal low
and the display will be blank. It is recommended to clear the
driver at power on.
In Figure 5, the ENABLE signal acts as an envelope, and
only while this signal is at a logic ‘1’ does the circuit accept
CLOCK input signals. Data is transferred and shifted in the
internal shift register on the rising clock edge, i.e., ‘0’–‘1’
transition. When the ENABLE signal goes low, the contents
of the shift registers are latched, and the display will show
new data. During data transfer, the display will show old
data. DATA OUT is also provided on the MM58341, being
output on the falling edge. At any time, the display may be
blanked under processor control, using the BLANKING
CONTROL input.
Figure 6 shows a schematic diagram of a microprocessor-
based system where the MM58341 is used to provide the
grid drive for a 32-digit 5 x 7 dot matrix vacuum fluorescent
(VF) display. The anode drive in this example is provided by
another member of the high voltage display driver family,
namely the MM58348, which does not require an externally
generated load signal.
3
相关PDF资料 |
PDF描述 |
|---|---|
| MM58341N | High Voltage Display Driver |
| MM58341V | High Voltage Display Driver |
| MM58342 | MM58342 High Voltage Display Driver |
| MM58342N | MM58342 High Voltage Display Driver |
| MM58342V | MM58342 High Voltage Display Driver |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MM58341N | 制造商:NSC 制造商全称:National Semiconductor 功能描述:High Voltage Display Driver |
| MM58341V | 制造商:NSC 制造商全称:National Semiconductor 功能描述:High Voltage Display Driver |
| MM58342 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:MM58342 High Voltage Display Driver |
| MM58342N | 制造商:NSC 制造商全称:National Semiconductor 功能描述:MM58342 High Voltage Display Driver |
| MM58342N/NOPB | 功能描述:IC DRIVER HI VOLT DISPLAY 28-DIP RoHS:是 类别:集成电路 (IC) >> PMIC - 显示器驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 显示器类型:真空荧光 (VF) 配置:5 x 7（矩阵） 接口:串行 数字或字符:- 电流 - 电源:3.5mA 电源电压:2.7 V ~ 3.6 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 供应商设备封装:16-QSOP 包装:带卷 (TR) |
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