A6277 Allegro MicroSystems, A6277 Datasheet

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A6277

Manufacturer Part Number
A6277
Description
8-BIT SERIAL-INPUT/ CONSTANTCURRENT LATCHED LED DRIVER
Manufacturer
Allegro MicroSystems
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
A6277EA
Manufacturer:
ALLEGRO/雅丽高
Quantity:
20 000
Part Number:
A6277ELW
Manufacturer:
ALLEGRO/雅丽高
Quantity:
20 000
Part Number:
A6277ELW-T
Manufacturer:
ALLEGRO
Quantity:
201
Part Number:
A6277SLW
Manufacturer:
ALLEGRO/雅丽高
Quantity:
20 000
(CURRENT)
Caution: These CMOS devices have input
static protection (Class 2) but are still suscep-
tible to damage if exposed to extremely high
static electrical charges.
Note that the A6277EA (DIP) and the A6277ELW
(SOIC) are electrically identical and share a
common terminal number assignment.
HIGH/LOW
Supply Voltage, V
Output Voltage Range,
Output Current, I
Input Voltage Range,
Package Power Dissipation,
Operating Temperature Range, T
Storage Temperature Range,
GROUND
GROUND
DATA IN
ENABLE
POWER
SERIAL
CLOCK
LATCH
LOGIC
OUT
OUT
OUT
OUT
V
V
P
Suffix ‘S-’ ................ -20 C to +85 C
Suffix ‘E-’ ................ -40 C to +85 C
T
D
S
O
I
.................... -0.4 V to V
0
1
2
3
..................................... See Graph
........................... -55 C to +150 C
............................ -0.5 V to +24 V
10
1
2
3
4
5
6
7
8
9
CK
L
SUB
O
REGISTER
LATCHES
DD
....................... 150 mA
REGULATOR
...................... 7.0 V
I
O
FF
V
SUB
OE
DD
DD
20
19
18
17
16
15
14
13
12
11
A
+ 0.4 V
Dwg. PP-029-17A
LOGIC
SUPPLY
R
SERIAL
DATA OUT
SERIAL
DATA OUT
OUTPUT
ENABLE
POWER
GROUND
OUT
OUT
OUT
OUT
EXT
7
6
5
4
1
2
8-BIT SERIAL-INPUT, CONSTANT-
CURRENT LATCHED LED DRIVER
6277
Each BiCMOS device includes an 8-bit CMOS shift register, accompa-
nying data latches, and eight npn constant-current sink drivers. Two
package styles and two operating temperature ranges are available.
microprocessor-based systems. With a 5 V logic supply, typical serial
data-input rates are up to 20 MHz. The LED drive current is deter-
mined by the user’s selection of a single resistor. A CMOS serial data
output permits cascade connections in applications requiring additional
drive lines. For inter-digit blanking, all output drivers can be disabled
with an ENABLE input high. In addition, a HIGH/LOW function
enables full selected current with the application of a logic low, or 50%
selected current with the application of a logic high.
operating temperature range. Suffix ‘E–’ is for -40 C to +85 C, and
suffix ‘S–’ is -20 C to +85 C. Two package styles are provided for
through-hole DIP (suffix ‘–A’) or surface-mount SOIC (suffix ‘–LW’)
applications. The copper lead frame and low logic-power dissipation
allow the dual in-line package to sink 122 mA through all outputs
continuously over the operating temperature range (1.0 V drop,
+85 C).
Always order by complete part number, e.g., A6277EA .
The A6277x is specifically designed for LED-display applications.
The CMOS shift register and latches allow direct interfacing with
The first character of the part number suffix determines the device
To 150 mA Constant-Current Outputs
Under-Voltage Lockout
Low-Power CMOS Logic and Latches
High Data Input Rate
Similar to Toshiba TD62715FN
High/Low Output Current Function
Digital “Dim” Control

Related parts for A6277

A6277 Summary of contents

Page 1

... V drop, +85 C). To 150 mA Constant-Current Outputs Under-Voltage Lockout + 0.4 V Low-Power CMOS Logic and Latches High Data Input Rate Similar to Toshiba TD62715FN High/Low Output Current Function Digital “Dim” Control Always order by complete part number, e.g., A6277EA . ...

Page 2

SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER 2.5 SUFFIX 'A C/W JA 2.0 1.5 1.0 0.5 SUFFIX 'LW C 100 AMBIENT TEMPERATURE IN C CLOCK SERIAL DATA IN LATCH ...

Page 3

Dwg. EP-010- Dwg. EP-010-13 8-BIT SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER Dwg. EP-010- OUT Dwg. EP-063-6 6277 ...

Page 4

SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER Typical Data and is for design information only. DD ...

Page 5

SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER ...

Page 6

SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER CLOCK SERIAL DATA IN SERIAL DATA OUT. SERIAL DATA OUT. LATCH ENABLE OUTPUT ENABLE OUT OUTPUT ENABLE OUT A. Data Active Time Before Clock Pulse (Data Set-Up Time), t .......................................... 60 ns su(D) ...

Page 7

DUTY CYCLE IN PER CENT 140 120 100 ...

Page 8

SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER 140 120 100 + C ...

Page 9

... DD The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current ...

Page 10

SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER The load current per bit ( set by the external resistor shown in the figure below. EXT 140 120 100 100 200 ...

Page 11

MAX 0.015 MIN 0.022 0.014 20 7.11 6.10 1 1.77 1.15 26.92 24.89 5.33 MAX 0.39 MIN 0.558 0.356 8-BIT SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER 0.014 0.008 11 10 0.100 0.005 ...

Page 12

SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER 20 0.2992 0.2914 0.020 1 0.013 0.0926 0.1043 0.0040 20 7.60 7.40 0. 0.33 2.65 2.35 0.10 MIN 0.050 3 0.5118 BSC 0.4961 MIN. 11 1.27 3 13.00 BSC ...

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