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6275 Просмотр технического описания (PDF) - Allegro MicroSystems

Номер в каталогеКомпоненты Описаниепроизводитель
6275 DABiC-IV, 32-BIT SERIAL-INPUT, LATCHED SOURCE DRIVER Allegro
Allegro MicroSystems Allegro
6275 Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
6818
A6818xA
LOAD
SUPPLY
1
VBB
SERIAL
DATA OUT
2
OUT32 3
OUT31 4
OUT30 5
OUT 29 6
OUT 28 7
OUT27 8
OUT26 9
OUT25 10
OUT24 11
OUT23 12
OUT 22 13
OUT 21 14
OUT20 15
OUT 19 16
OUT 18 17
OUT17 18
BLANKING 19 BLNK
GROUND 20
VDD
40
LOGIC
SUPPLY
39
SERIAL
DATA IN
38 OUT 1
37 OUT 2
36 OUT 3
35 OUT 4
34 OUT5
33 OUT 6
32 OUT7
31 OUT8
30 OUT9
29 OUT 10
28 OUT 11
27 OUT 12
26 OUT 13
25 OUT 14
24 OUT 15
23 OUT 16
ST 22 STROBE
CLK 21 CLOCK
Dwg. PP-029-4
ABSOLUTE MAXIMUM RATINGS
at TA = 25°C
Logic Supply Voltage, VDD ................... 7.0 V
Driver Supply Voltage, VBB ................... 60 V
Continuous Output Current Range,
IOUT ......................... -40 mA to +15 mA
Input Voltage Range,
VIN ....................... -0.3 V to VDD + 0.3 V
Package Power Dissipation,
PD ........................................ See Graph
Operating Temperature Range, TA
(Suffix ‘E–’) .................. -40°C to +85°C
(Suffix ‘K–’) ................ -40°C to +125°C
(Suffix ‘S–’) .................. -20°C to +85°C
Storage Temperature Range,
TS ............................... -55°C to +125°C
Caution: These CMOS devices have input static
protection (Class 2) but are still susceptible to
damage if exposed to extremely high static
electrical charges.
DABiC-IV, 32-BIT SERIAL-INPUT,
LATCHED SOURCE DRIVER
The A6818– devices combine a 32-bit CMOS shift register, accom-
panying data latches and control circuitry with bipolar sourcing outputs
and pnp active pull downs. Designed primarily to drive vacuum-
fluorescent displays, the 60 V and -40 mA output ratings also allow
these devices to be used in many other peripheral power driver
applications. The A6818– features an increased data input rate
(compared with the older UCN/UCQ5818–F) and a controlled output
slew rate.
The CMOS shift register and latches allow direct interfacing with
microprocessor-based systems. With a 3.3 V or 5 V logic supply,
typical serial-data input rates are up to 33 MHz.
A CMOS serial data output permits cascade connections in
applications requiring additional drive lines. Similar devices are avail-
able as the A6809– and A6810– (10 bits), A6811– (12 bits), and
A6812– (20 bits).
The A6818– output source drivers are npn Darlingtons, capable of
sourcing up to 40 mA. The controlled output slew rate reduces electro-
magnetic noise, which is an important consideration in systems that
include telecommunications and/or microprocessors and to meet
government emissions regulations. For inter-digit blanking, all output
drivers can be disabled and all sink drivers turned on with a BLANK-
ING input high. The pnp active pull-downs will sink at least 2.5 mA.
Three temperature ranges are available for optimum performance
in commercial (suffix S-), industrial (suffix E-), or automotive (suffix K-)
applications. Package styles are provided for through-hole DIP (suffix
-A) or minimum-area surface-mount PLCC (suffix -EP). Copper lead
frames, low logic-power dissipation, and low output-saturation voltages
allow these devices to drive most multiplexed vacuum-fluorescent
displays over the maximum operating temperature range.
FEATURES
s Controlled Output Slew Rate s Low Output-Saturation Voltages
s High-Speed Data Storage s Low-Power CMOS Logic
s 60 V Minimum
and Latches
Output Breakdown
s Improved Replacements
s High Data Input Rate
for SN75518N, SN75518NF,
s PNP Active Pull-Downs
UCN5818–, and UCQ5818–
Complete part number includes a suffix to identify operating
temperature range (E-, K-, or S-) and package type (-A or -EP).
Always order by complete part number, e.g., A6818SEP .
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