Data Sheet
26185.201B†
6276
16-BIT SERIAL-INPUT, CONSTANT-
CURRENT LATCHED LED DRIVER
A6276ELW
GROUND
SERIAL
DATA IN
CLOCK
LATCH
ENABLE
OUT
0
OUT
1
OUT
2
OUT
3
OUT
4
OUT
5
OUT
6
OUT
7
1
2
3
4
5
6
7
8
9
10
11
12
CK
L
REGISTER
LATCHES
20
19
18
17
16
15
14
13
OE
V
DD
I
O
REGULATOR
24
23
22
21
LOGIC
SUPPLY
R
EXT
SERIAL
DATA OUT
OUTPUT
ENABLE
OUT
15
OUT
14
OUT
13
OUT
12
OUT
11
OUT
10
OUT
9
OUT
8
The A6276EA and A6276ELW are specifically designed for LED-
display applications. Each BiCMOS device includes a 16-bit CMOS
shift register, accompanying data latches, and 16 npn constant-current
sink drivers. Except for package style and allowable package power
dissipation, the two devices are identical.
The CMOS shift register and latches allow direct interfacing with
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. Similar 8-bit devices are available as the
A6275EA and A6275ELW.
Two package styles are provided for through-hole DIP (suffix A) or
surface-mount SOIC (suffix LW). Under normal applications, a copper
lead frame and low logic-power dissipation allow the dual in-line
package to sink maximum rated current through all outputs continu-
ously over the operating temperature range (90 mA, 0.75 V drop,
+85°C). Both devices are also available for operation over the standard
temperature range of -20°C to +85°C. To order, change the suffix
letter ‘E’ to ‘S’.
Dwg. PP-029-11
Note that the A6276EA (DIP) and the A6276ELW
(SOIC) are electrically identical and share a
common terminal number assignment.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
DD
......................
7.0 V
Output Voltage Range,
V
O
............................
-0.5 V to +17 V
Output Current, I
O
........................
90 mA
Ground Current, I
GND
...............
1475 mA
Input Voltage Range,
V
I
....................
-0.4 V to V
DD
+ 0.4 V
Package Power Dissipation,
P
D
.....................................
See Graph
Operating Temperature Range,
T
A
.............................
-40
°
C to +85
°
C
Storage Temperature Range,
T
S
...........................
-55
°
C to +150
°
C
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.
FEATURES
s
s
s
s
s
To 90 mA Constant-Current Outputs
Under-Voltage Lockout
Low-Power CMOS Logic and Latches
High Data Input Rate
Functional Replacement for TB62706BN/BF
Always order by complete part number, e.g.,
A6276EA
.
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
