Parallel Converter. HV57908 Datasheet

HV57908 Converter. Datasheet pdf. Equivalent

Part HV57908
Description 64-Channel Serial to Parallel Converter
Feature Supertex inc. HV57908 8MHz, 64-Channel Serial to Parallel Converter with Push-Pull Outputs Featur.
Manufacture Supertex Inc
Datasheet
Download HV57908 Datasheet



HV57908
Supertex inc.
HV57908
8MHz, 64-Channel Serial to Parallel Converter
with Push-Pull Outputs
Features
►HVCMOS® technology
►5.0V CMS Logic
►Output voltage up to +80V
►Low power level shifting
►8.0MHz data rate
►Latched data outputs
►Forward and reverse shifting options (DIR pin)
Diode to VPP allows efficient power recovery
►Outputs may be hot switched
General Description
The HV57908 is a low voltage serial to high voltage parallel
converter with push-pull outputs. The device has been designed
for use as a driver for EL displays. It can also be used in any
application requiring multiple output high voltage current sourcing
and sinking capability such as driving plasma panels, vacuum
fluorescent displays, or large matrix LCD displays.
The device consists of a 64-bit shift register, 64 latches and control
logic to perform the polarity select and blanking of the outputs.
HVOUT1 is connected to the first stage of the first shift register
through the polarity and blanking logic. Data is shifted through the
shift registers on the logic low to high transition of the clock. The
DIR pin causes CCW shifting when connected to GND, and CW
shifting when connected to VDD. A data output buffer is provided
for cascading devices. This output reflects the current status of
the last bit of the shift register (HVOUT64). Operation of the shift
register is not affected by the LE (latch enable), BL (blanking), or
the POL (polarity) inputs. Transfer of data from the shift registers
to the latches occurs when the LE input is high. The data in the
latches is stored when the LE is low.
Functional Block Diagram
POL
BL
LE
VPP
DI/OA
CLK
DIR
64-bit
Static Shift
Register
64 Latches
Doc.# DSFP-HV57908
A061913
DI/OB
HVOUT1
HVOUT2
60 Additional
Outputs
HVOUT63
HVOUT64
Supertex inc.
www.supertex.com



HV57908
Ordering Information
Part Number
Package Option
HV57908PG-G
80-Lead PQFP
-G denotes a lead (Pb)-free / RoHS compliant package
Packing
66/Tray
Pin Configuration
HV57908
Absolute Maximum Ratings
Parameter
Value
Supply voltage, VDD
Output voltage, VPP
Logic input levels
Ground current1
Continuous total power dissipation2
-0.5V to +7.5V
-0.5V to +90V
-0.3V to VDD +0.3V
1.5A
1200mW
Operating temperature range
-40°C to +85°C
Storage temperature range
-65°C to +150°C
Absolute Maximum Ratings are those values beyond which damage to the
device may occur. Functional operation under these conditions is not implied.
Continuous operation of the device at the absolute rating level may affect
device reliability. All voltages are referenced to device ground.
Notes:
1. Limited by the total dissipated in the package.
2. For operation above 25°C ambiant derate linearly to maximum
operating temperature at 20mW/°C.
80
1
80-Lead PQFP
Product Marking
HV57908PG
LLLLLLLLLL
YYWW
CCCCCCCC AAA
L = Lot Number
YY = Year Sealed
WW = Week Sealed
C = Country of Origin
A = Assembler ID
= “Green” Packaging
Package may or may not include the following marks: Si or
80-Lead PQFP
Typical Thermal Resistance
Package
θja
80-Lead PQFP
37OC/W
Recommended Operating Conditions
Sym
Parameter
Min
VDD Logic supply voltage
VPP Output voltage
VIH High-level input voltage
VIL Low-level input voltage
fCLK Clock frequency per register
TA Operating free-air temperature
Notes:
Power-up sequence should be the following:
1. Apply ground
2.
3.
ASpept layllVinDpD uts (Data, CLK, Enable, etc.) to a known state
4.
5.
TAhpeplyVPVPPsPhould not drop below VDD or float during operation
4.5
8.0
VDD - 0.5
0
-
-40
Power-down sequence should be the reverse of the above.
Max
5.5
80
-
0.5
8.0
+85
Units
V
V
V
V
MHz
°C
Doc.# DSFP-HV57908
A061913
Supertex inc.
2 www.supertex.com







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