6812_03 Datasheet, PDF (1/9 Pages) Allegro MicroSystems – DABiC-IV, 20-BIT SERIAL-INPUT LATCHED SOURCE DRIVER

6812
A6812xA (DIP)
LOAD
SUPPLY
1
V_BB
SERIAL
DATA OUT
2
OUT₂₀ 3
OUT₁₉ 4
OUT₁₈ 5
OUT ₁₇ 6
OUT ₁₆ 7
OUT₁₅ 8
OUT₁₄ 9
OUT₁₃ 10
OUT₁₂ 11
OUT₁₁ 12
BLANKING 13 BLNK
GROUND 14
V_DD
28
LOGIC
SUPPLY
27
SERIAL
DATA IN
26 OUT ₁
25 OUT ₂
24 OUT ₃
23 OUT ₄
22 OUT₅
21 OUT ₆
20 OUT₇
19 OUT₈
18 OUT₉
17 OUT ₁₀
ST 2186 STROBE
CLK 2175 CLOCK
Dwg. PP-029-7
ABSOLUTE MAXIMUM RATINGS
at T_A = 25°C
Logic Supply Voltage, V_DD ................... 7.0 V
Driver Supply Voltage, V_BB ................... 60 V
Continuous Output Current Range,
I_OUT ......................... -40 mA to +15 mA
Input Voltage Range,
V_IN ....................... -0.3 V to V_DD + 0.3 V
Package Power Dissipation,
P_D ........................................ See Graph
Operating Temperature Range, T_A
(Suffix ‘E–’) .................. -40°C to +85°C
(Suffix ‘K–’) ................ -40°C to +125°C
(Suffix ‘S–’) .................. -20°C to +85°C
Storage Temperature Range,
T_S ............................... -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, 20-BIT SERIAL-INPUT,
LATCHED SOURCE DRIVER
The A6812– devices combine a 20-bit CMOS shift register,
accompanying 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 A6812– features an increased data input rate (com-
pared with the older UCN/UCQ5812-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, they
will operate to at least 10 MHz.
A CMOS serial data output permits cascade connections in applica-
tions requiring additional drive lines. Similar devices are available as
the A6810– (10 bits) and A6818– (32 bits).
The A6812– 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), surface-mount SOIC (suffix -LW), or minimum-area
surface-mount PLCC (suffix -EP). Copper lead frames, low logic-
power dissipation, and low output-saturation voltages allow these
drivers to source 25 mA from all outputs continuously to more than
+43°C (suffix -LW), +61°C (suffix -EP), or +77°C (suffix -A).
FEATURES
s Controlled Output Slew Rate
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 TL5812–, UCN5812–,
s PNP Active Pull-Downs
and UCQ5812–
s Low Output-Saturation Voltages
Complete part number includes a suffix to identify operating
temperature range (E-, K-, or S-) and package type (-A, -EP, or -LW).
Always order by complete part number, e.g., A6812SLW .