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参数资料
| 型号： | HI-8020JF-85 |
| 厂商： | HOLT INTEGRATED CIRCUITS INC |
| 元件分类： | 显示驱动器 |
| 英文描述： | CMOS HIGH VOLTAGE DISPLAY DRIVER |
| 中文描述： | LIQUID CRYSTAL DISPLAY DRIVER, PQCC44 |
| 封装： | ROHS COMPLIANT, PLASTIC, LCC-44 |
| 文件页数： | 2/7页 |
| 文件大小： | 233K |
| 代理商： | HI-8020JF-85 |
FUNCTIONAL DESCRIPTION
Whenever a Logic "0" is applied to the Chip Select (
input,onebitofdataisclockedintotheshiftregisterfromthe
serial data input (DIN) with each negative transition of the
Clock (
) input. A Logic "1" present at the Load (LD) input
will cause a parallel transfer of data from the shift register to
the data latch. If the Load (LD) input is held high while data
is clocked into the shift register, the latch will be transparent.
All four logic inputs are TTL compatible on the HI-8020 and
CMOScompatibleontheHI-8120.
)
To display segments, a Logic "1" is stored in the appropriate
shift register bit position, and the segment output is out-of-
phasewiththebackplane.
The backplane output functions in 1 of 2 modes; externally
drivenorself-oscillating. WhentheLCDinputisexternally
driven with the LCDOPT input open circuit (Figure 2), the
backplane output will be in-phase with LCD. Utilizing the
self-oscillating mode, inputs LCD and LCDOPT are tied
together and connected to an RC circuit (Figure 3).
A 150K
resistor with a 470pF capacitor generates an
approximate backplane frequency of 100Hz. The
LCD/LCDOPT oscillator frequency is divided by 256 to
determine the backplane output frequency.
value (R) must be at least 30K
operation.
The resistor
for proper self-oscillator
For displays having a number of segments greater than 38,
twoormoreofthedisplaydriversmaybecascadedtogether
by connecting the serial data output (DOUT) from the first
driver, to the serial data input (DIN) of the following driver,
etc.(See Figures 2 & 3). Data out (DOUT) will change state
CS
CL
HI-8020/HI-8120 Series
HOLT INTEGRATED CIRCUITS
2
INTERNAL OSCILLATOR CIRCUIT
TO BACKPLANE
TRANSLATOR
AND DRIVER
÷ 256
C
R
LCD
OPT
LCD
Figure 1.
Q
on the rising edge of the Clock (
and Chip Select (
other,respectively,betweenallcascadeddisplaydrivers.
). Clock (
), Load (LD)
) should be tied in common with each
CL
CL
CS
TIMING DIAGRAM
t
CSH
t
CSS
t
DS
t
DH
t
CL
t
CDO
t
LS
t
LW
t
CSL
t
LCS
CL
INPUT
DIN
INPUT
CS
INPUT
LD
INPUT
DOUT
OUTPUT
VALID
VALID
VALID
VALID
VALID
相关PDF资料 |
PDF描述 |
|---|---|
| HI-8120JF-85 | CMOS HIGH VOLTAGE DISPLAY DRIVER |
| HI-8787 | ARINC INTERFACE DEVICE 16-BIT PARALLEL DATA CONVERTED 429&561 SERIAL DATA OUT |
| HI-8787PQI | 512 MACROCELL 3.3 VOLT ZERO POWER ISP CP - NOT RECOMMENDED for NEW DESIGN |
| HI-8787PQT | 512 MACROCELL 3.3 VOLT ZERO POWER ISP CP - NOT RECOMMENDED for NEW DESIGN |
| HI-8788 | ARINC INTERFACE DEVICE 16-BIT PARALLEL DATA CONVERTED 429&561 SERIAL DATA OUT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HI-8020P-80 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Interface IC |
| HI-8020P-81 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Interface IC |
| HI-8020S-61 | 制造商:HOLTIC 制造商全称:Holt Integrated Circuits 功能描述:CMOS HIGH VOLTAGE DISPLAY DRIVER |
| HI-8020S-63 | 制造商:HOLTIC 制造商全称:Holt Integrated Circuits 功能描述:CMOS HIGH VOLTAGE DISPLAY DRIVER |
| HI-8020SERIES | 制造商:HOLTIC 制造商全称:Holt Integrated Circuits 功能描述:CMOS High Voltage LCD Display Driver (30-38 Segments) |
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