6810 Datasheet PDF - Allegro
Part Number | 6810 | |
Description | LATCHED SOURCE DRIVER | |
Manufacturers | Allegro | |
Logo | ||
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A6810xA
OUT8 1
OUT7 2
OUT6 3
CLOCK 4 CLK
GROUND 5
LOGIC
SUPPLY
6 VDD
STROBE 7 ST
OUT 5 8
OUT4 9
18 OUT 9
LATCHES
REGISTER
REGISTER
LATCHES
17 OUT 10
16
SERIAL
DATA OUT
VBB 15
LOAD
SUPPLY
14 SERIAL
DATA IN
BLNK 13 BLANKING
12 OUT1
11 OUT 2
10 OUT 3
Dwg. PP-029
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 ‘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, 10-BIT SERIAL-INPUT,
LATCHED SOURCE DRIVER
The A6810– devices combine 10-bit CMOS shift registers, 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 applica-
tions. The A6810– feature an increased data input rate (compared with
the older UCN/UCQ5810-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,
serial-data input rates of 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 A6812– (20 bits) and A6818– (32 bits).
The A6810– 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.
The A6810– are available in two temperature ranges for optimum
performance in commercial (suffix S-) or industrial (suffix E-) applica-
tions. They are provided in two package styles for through-hole DIP
(suffix -A) or minimum-area surface-mount SOIC (suffix -LW).
Copper lead frames, low logic-power dissipation, and low output-
saturation voltages allow all devices to source 25 mA from all outputs
continuously over the maximum operating temperature range.
FEATURES
s Controlled Output Slew Rate
s High-Speed Data Storage
s 60 V Minimum
Output Breakdown
s High Data Input Rate
s PNP Active Pull-Downs
s Improved Replacements
for TL4810–, UCN5810–,
and UCQ5810–
s Low Output-Saturation Voltages
s Low-Power CMOS Logic
and Latches
Complete part number includes a suffix to identify operating
temperature range (E- or S-) and package type (-A or -LW). Always
order by complete part number, e.g., A6810SLW .
|
|
6810
10-BIT SERIAL-INPUT,
LATCHED SOURCE DRIVER
TIMING REQUIREMENTS and SPECIFICATIONS
(Logic Levels are VDD and Ground)
C
CLOCK
50%
SERIAL
DATA IN
SERIAL
DATA OUT
AB
DATA
50%
t p(CH-SQX)
50%
DE
DATA
STROBE
50%
BLANKING
OUT N
LOW = ALL OUTPUTS ENABLED
t p(STH-QH)
t p(STH-QL)
90%
DATA
10%
BLANKING
OUT N
Dwg. WP-029
HIGH = ALL OUTPUTS BLANKED (DISABLED)
50%
t en(BQ)
t dis(BQ)
tr
DATA
10%
tf
90%
50%
A. Data Active Time Before Clock Pulse
(Data Set-Up Time), tsu(D) ......................................... 25 ns
B. Data Active Time After Clock Pulse
(Data Hold Time), th(D) ............................................... 25 ns
C. Clock Pulse Width, tw(CH) ............................................... 50 ns
D. Time Between Clock Activation and Strobe, tsu(C) ....... 100 ns
E. Strobe Pulse Width, tw(STH) ............................................. 50 ns
NOTE – Timing is representative of a 10 MHz clock. Higher
speeds may be attainable; operation at high temperatures will
reduce the specified maximum clock frequency.
Serial Data present at the input is transferred to the shift
register on the logic “0” to logic “1” transition of the CLOCK
input pulse. On succeeding CLOCK pulses, the registers shift
data information towards the SERIAL DATA OUTPUT. The
Dwg. WP-030A
SERIAL DATA must appear at the input prior to the rising edge
of the CLOCK input waveform.
Information present at any register is transferred to the
respective latch when the STROBE is high (serial-to-parallel
conversion). The latches will continue to accept new data as
long as the STROBE is held high. Applications where the
latches are bypassed (STROBE tied high) will require that the
BLANKING input be high during serial data entry.
When the BLANKING input is high, the output source
drivers are disabled (OFF); the pnp active pull-down sink
drivers are ON. The information stored in the latches is not
affected by the BLANKING input. With the BLANKING input
low, the outputs are controlled by the state of their respective
latches.
www.allegromicro.com
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