6276_03 Datasheet, PDF (1/14 Pages) Allegro MicroSystems – 16-BIT SERIAL-INPUT, CONSTANT CURRENT LATCHED LED DRIV ER

6276
16-BIT SERIAL-INPUT, CONSTANT-
CURRENT LATCHED LED DRIVER
A6276ELW
GR OUND 1
S E R IAL
DATA IN ²
CLOCK 3 CK
LATCH _{4 L}
E NABLE
OUT ₀ 5
OUT ₁ 6
OUT ₂ 7
OUT ₃ 8
OUT ₄ 9
OUT ₅ 10
OUT ₆ 11
OUT ₇ 12
V _DD
24
LO G IC
S UP P LY
I_O
R E GULATOR
23 R _{E XT}
S E R IAL
22 _{DAT A OUT}
R E GIS TE R
LATCHE S
OE 21 ^{OUT P UT}
E NABLE
20 OUT ₁₅
19 OUT ₁₄
18 OUT ₁₃
17 OUT ₁₂
16 OUT ₁₁
15 OUT ₁₀
14 OUT ₉
13 OUT ₈
Dwg. P P -029-11
Note that three packages offered are electrically
identical and share a common terminal number as-
signment.
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 susceptible
to damage if exposed to extremely high static
electrical charges.
The A6276 is specifically designed for LED-display applications.
Each BiCMOS device includes a 16-bit CMOS shift register, accom-
panying data latches, and 16 npn constant-current sink drivers. Except
for package style and allowable package power dissipation, the device
options 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.
Three package styles are provided: through-hole DIP (suffix A),
surface-mount SOIC (suffix LW) and TSSOP with exposed thermal pad
(suffix LP). Under normal applications, a copper lead frame and low
logic-power dissipation allow the dual in-line package to sink maxi-
mum rated current through all outputs continuously over the operating
temperature range (90 mA, 0.75 V drop, +85°C).
FEATURES
■ To 90 mA Constant-Current Outputs
■ Under-Voltage Lockout
■ Low-Power CMOS Logic and Latches
■ High Data Input Rate
■ Functional Replacement for TB62706BN/BF
Selection Guide
Part Number Pb-free* Package
Packing
Ambient
Temperature (°C)
A6276EA-T
Yes
24-pin DIP
15 per tube
–40 to 85
A6276ELP-T
Yes 24-pin TSSOP 62 per tube
–40 to 85
A6276ELPTR-T Yes 24-pin TSSOP 4000 per reel
–40 to 85
A6276ELW-T
Yes 24-pin SOICW 31 per tube
–40 to 85
A6276ELWTR-T Yes 24-pin SOICW 1000 per reel
–40 to 85
A6276SLW-T
Yes 24-pin SOICW 31 per tube
–20 to 85
A6276SLWTR-T Yes 24-pin SOICW 1000 per reel
–20 to 85
*Pb-based variants are being phased out of the product line. The variants cited in this
footnote are in production but have been determined to be NOT FOR NEW DESIGN.
This classification indicates that sale of this device is currently restricted to existing
customer applications. The variants should not be purchased for new design applica-
tions because obsolescence in the near future is probable. Samples are no longer
available. Status change: May 1, 2006. These variants include:A6276EA, A6276ELW,
A6276ELWTR, A6276SA, A6276SLW, and A6276SLWTR.