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A6277ELW, A6278, A6278F

Table of contents:
Info of A6277ELW
Info of A6278
Info of A6278F

A6277ELW, A6278, A6278F Selling Leads, Datasheet

MFG:Allegro Microsystems Inc Category:Integrated Circuits (ICs) Package Cooled:N/A D/C:09+

A6277ELW, A6278, A6278F Datasheet download

Five Points

Part Number: A6277ELW

Category: Integrated Circuits (ICs)

MFG: Allegro Microsystems Inc

Package Cooled: N/A

D/C: 09+

Description: IC LED DRIVER 8BIT SER 20-SOIC

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A6277ELW Parameters

Technical/Catalog Information	A6277ELW
Vendor	Allegro Microsystems Inc
Category	Integrated Circuits (ICs)
Package / Case	20-SOIC (7.5mm Width)
Packaging	Tube
Current - Output / Channel	120mA
Number of Outputs	8
Type	Linear (Non-Switching)
Voltage - Supply	4.5 V ~ 5.5 V
Voltage - Output	1V
Topology	Smart
Frequency	20MHz
Operating Temperature	-40°C ~ 85°C
Efficiency	-
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	A6277ELW A6277ELW

A6277ELW Maximum Ratings

Supply Voltage, V_DD ...................................................................... 7.0 V
Output Voltage Range, V_O ............................................. -0.5 V to +24 V
Output Current, I_O ..................................................................... 150 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
Suffix 'S-' .......................... -20°C to +85°C
Suffix 'E-' .......................... -40°C to +85°C
Storage Temperature Range, T_S .................................. -55°C to +150°C

A6277ELW Features

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

A6278 General Description

The A6278 and A6279 devices are specifically designed for LED display applications. Each of these BiCMOS devices includes a CMOS shift register, accompanying data latches, and NPN constant-current sink drivers. The A6278 contains 8 sink drivers, while there are 16 in the A6279.

The CMOS shift register and latches allow direct interfacing with microprocessor-based systems. With a 3.3 or 5 V logic supply, typical serial data-input rates can reach up to 25 MHz. The LED drive current is determined by the user’s selection of a single resistor. A CMOS serial data output permits cascading between multiple devices in applications requiring additional drive lines. Open LED connections can be detected and signaled back to the host microprocessor through the SERIAL DATA OUT pin.

Four package styles are provided: an MLP/QFN surface mount, 0.90 mm overall height nominal (A6279 only); a DIP (type A) for through-hole applications; and for leaded surface-mount, an SOIC (type LW) and a TSSOP with exposed thermal pad (type LP). All package styles for the A6278 are electrically identical to each other, as are the A6279 package styles. All packages are lead (Pb) free, with 100% matte tin plated leadframes.

A6278 Maximum Ratings

3.0 to 5.5 V logic supply range
Schmitt trigger inputs for improved noise immunity
Power-On Reset (POR)
Up to 90 mA constant-current sinking outputs
LED open circuit detection
Low-power CMOS logic and latches
High data input rate
20 ns typical staggering delay on the outputs
Internal UVLO and thermal shut down (TSD) circuitry

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