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부품번호 | HV5812 기능 |
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기능 | 20-Channel Serial-Input Vacuum Fluorescent Display Driver | ||
제조업체 | Microchip | ||
로고 | |||
전체 16 페이지수
HV5812
20-Channel Serial-Input Vacuum Fluorescent Display Driver for Anode or Grid
Features
• HVCMOS® Technology for High Performance
• Operating Voltage of up to 80V
• High-speed Source Driver
• 5V CMOS Logic Circuitry
• Up to 5 MHz Data Input Rate
• Excellent Noise Immunity
• Flexible High-voltage Supplies
Applications
• Display Driver
General Description
The HV5812 is a 20-channel serial-input vacuum
fluorescent display driver. It combines a 20-bit CMOS
shift register, data latches and control circuitry with
high-voltage MOSFET outputs. The HV5812 is
primarily designed for vacuum fluorescent displays.
The CMOS shift register and latches allow direct
interfacing with microprocessor-based systems. Data
input rates are typically over 5 MHz with 5V logic
supply. Especially useful for interdigit blanking, the
blanking input disables the output source drives and
turns on the sink drivers. Using with TTL may require
external pull-up resistors to ensure an input logic high.
Package Types
28-lead PDIP
(Top view)
1 28
28-lead PLCC
(Top view)
4 1 28 26
28-lead SOW
(Top view)
1 28
See Table 2-1 for pin information.
2016 Microchip Technology Inc.
DS20005629A-page 1
HV5812
AC ELECTRICAL CHARACTERISTICS
Electrical Specifications: Over recommended operating conditions; TA = 25°C unless otherwise indicated.
Parameter
Sym. Min. Typ. Max. Unit
Conditions
Blanking to Output Delay
tPHL
tPLH
— 2000
— 1000
Output Fall Time
tr — 1450
Output Rise Time
tf — 650
Data Set-up Time
tSU 75 —
Data Hold Time
tH 75 —
Minimum Data Pulse Width
tPWD
150
—
Minimum Clock Pulse Width
tPWCLK 150
—
Minimum Time between Clock
Activation and Strobe
tCKS
300
—
Minimum Strobe Pulse Width
Typical Time between Strobe
Activation and Output
Transition
tPWS
100
—
tSTO
— 500
Maximum Clock Frequency
fCLK
—
—
8
5
—
—
—
—
—
—
—
—
—
—
—
—
—
ns CL = 30 pF, 50% to 50%, VDD=5V
ns CL = 30 pF, 90% to 10%, VDD = 5V
ns CL = 30 pF, 10% to 90%, VDD = 5V
ns See Timing Waveforms.
ns See Timing Waveforms.
ns See Timing Waveforms.
ns See Timing Waveforms.
ns See Timing Waveforms.
ns SeeTiming Waveforms.
ns See Timing Waveforms.
MHz
TJ = +25°C, VDD = 5V
TJ = +125°C, VDD = 5V
TEMPERATURE SPECIFICATIONS
Parameter
Sym. Min. Typ. Max. Unit
TEMPERATURE RANGE
Operating Junction Temperature TJ –40 — +125 °C
Storage Temperature
TS –55 — +150 °C
PACKAGE THERMAL RESISTANCE
28-lead PDIP
28-lead PLCC
28-lead SOW
JA — 43 — °C/W
JA — 48 — °C/W
JA — 55 — °C/W
Conditions
DS20005629A-page 4
2016 Microchip Technology Inc.
4페이지 HV5812
3.0 FUNCTIONAL DESCRIPTION
Follow the steps below to power up and power down
the HV5812:
POWER-UP AND POWER-DOWN SEQUENCE
Power-up
Step
Description
Step
1 Connect ground.
1
2 Apply VDD.
3 Set all inputs (Data, CLK, etc.) to a known state
2
3
4 Apply VPP. (Note 1)
4
Note 1: The VPP should not drop below VDD during operation.
Power-down
Description
Remove VPP.
Remove all inputs.
Remove VDD.
Disconnect ground.
FUNCTION TABLE (Note 1)
,
Serial
Data
Input
Clock
Input
Shift Register Contents
I1 I2 I3... IN-1
IN
H L to H H R1 R2...RN–2 RN–1
L L to H L R1 R2...RN–2 RN–1
X H to L R1 R2 R3...RN–1 RN
— — X X X...X
X
—
— P1 P2 P3...PN–1
PN
— — ——
—
—
Note 1:
L = Low logic level
H = High logic level
X = Irrelevant
P = Present state
R = Previous state
Serial
Data
Output
Strobe
Input
I1
RN–1
RN–1
RN
X
PN
—
——
——
——
L R1
H P1
—X
Latch Contents
Output Contents
Blanking
I2 I3... IN-1 IN
I1 I2 I3... IN-1 IN
— — — — —— — —
— — — — —— — —
— — — — —— — —
R2 R3...RN–1 RN — — — — —
P2 P3...PN–1 PN L P1 P2 P3...PN–1 PN
X X...X X
H
LL
L...L
L
VDD
INPUT
VDD
VPP
Data Out
L/T
HVOUT
GND
Logic Inputs
FIGURE 3-1:
IO Circuits.
GND
Logic Data Output
GND
High Voltage Outputs
2016 Microchip Technology Inc.
DS20005629A-page 7
7페이지 | |||
구 성 | 총 16 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
HV5812 | Vacuum-Fluorescent Display Driver | Supertex Inc |
HV5812 | 20-Channel Serial-Input Vacuum Fluorescent Display Driver | Microchip |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |