MAX4896 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – Space-Saving, 8-Channel Relay/Load Driver

19-3843; Rev 1; 6/07
Space-Saving, 8-Channel Relay/Load Driver
General Description
The MAX4896 8-channel relay and load driver is
designed for medium voltage applications up to 50V.
This device is offered in a 20-pin, 5mm x 5mm TQFN
package, resulting in substantial board space savings.
The MAX4896 8-channel relay driver offers built-in
inductive kickback protection, drive for latching/
nonlatching or dual-coil relays, and open-load and
short-circuit fault detection.The MAX4896 also protects
against overcurrent conditions. Each independent
open-drain output features a 3Ω (typ) on-resistance,
and is guaranteed to sink 200mA of load current
(V_S ≥ 4.5V).
A built-in overvoltage protection clamp handles kick-
back-voltage transients, which are common when dri-
ving inductive loads. Thermal-shutdown circuitry shuts
off all outputs (OUT_) when the junction temperature
exceeds +160°C. The MAX4896 employs a reset input
that allows the user to turn off all outputs simultaneously
with a single control line.
The MAX4896 includes a 10MHz SPI™-/QSPI™-/
MICROWIRE™-compatible serial interface. The serial
interface is compatible with TTL-/CMOS-logic voltage
levels and operates with a single +2.7V to +5.5V sup-
ply. In addition, the SPI output data can be used for
diagnostics purposes including open-load and short-
circuit fault detection.
The MAX4896 is offered in the extended (-40°C to
+85°C) and automotive (-40°C to +125°C) operating
temperature ranges.
Typical Operating Circuit
Vcc = 2.7V TO 5.5V
0.1μF
VRELAY
INT
μC
PDCD
VS
FLAG
RESET
SCLK
CS
DIN
DOUT
MAX4896
OUT1
RELAY
COIL 1
VRELAY
OUT8
RELAY
COIL 8
SLPD
GND
PGND
Features
♦ Supports Up to 50V Continuous Drain-to-Source
Voltage
♦ Guaranteed Drive Current:
♦ V_S ≥ 4.5V
200mA (All Channels On)
410mA (Individual Channels)
♦ V_S ≤ 3.6V
100mA
♦ Built-In Output Clamp Protects Against Inductive
Kickback
♦ +2.7V to +5.5V Logic Supply Voltage
♦ RESET Input Turns Off All Outputs
Simultaneously
♦ Built-in Power-On Reset
♦ Automotive Temperature Range
(-40°C to +125°C)
♦ SPI-/QSPI-/MICROWIRE-Compatible Serial
Interface
♦ Serial Digital Output for Daisy Chaining and
Diagnostics
♦ FLAG Output for µP Interrupt
♦ Open-Load and Short-Circuit Detection and
Protection
♦ Thermal Shutdown
♦ Low 100µA (max) Quiescent Supply Current
♦ Space-Saving, 5mm x 5mm, 20-Pin TQFN Package
Industrial Equipment
White Goods
Power-Grid Monitoring
and Protection Equipment
Applications
Automotive Relay Control
ATE
Ordering Information
PART
TEMP
RANGE
MAX4896ETP+
-40°C to
+85°C
MAX4896ATP+
-40°C to
+125°C
*EP = Exposed paddle
+ Denotes a lead-free package.
PIN-
PACKAGE
20 TQFN-EP*
(5mm x 5mm)
20 TQFN-EP*
(5mm x 5mm)
PACKAGE
CODE
T2055-5
T2055-5
Pin Configuration appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.