Document
Five/Six Channel Push/Pull I/O Expander General Description
The AAT4296/98 SmartSwitch is a member of AnalogicTech's Application Specific Power MOSFET™ (ASPM™) product family. The AAT4296/98 is comprised of five/six push/pull output switches that gate each respective output between a common input supply and ground. This device is targeted for I/O expansion applications, but can also be used for a combination of general purposes to simplify power switching with an off state load discharge. The AAT4296/98 operates over an input voltage range of 1.8V to 5.5V, making it ideal for batterypowered applications. The state of each output channel is controlled with a single GPIO via the EN/SET pin using AnalogicTech's Simple Serial Control™ (S2Cwire™) interface. When EN/SET is pulled to logic high, the device is enabled and consumes 3µA of typical quiescent current. In the off state, each output is pulled low to ground to affect a logic low state for I/O expander or power switching applications; this circuit will act as a load discharge function to rapidly turn off a load circuit.
AAT4296/98
Features
• • • • • • • •
SmartSwitch™
VIN Range: 1.8V to 5.5V Independent Push/Pull Channels — AAT4296: Five Channels — AAT4298: Six Channels User-Programmable Interface Single GPIO Controls State of Each Output Optional Fast Auto-Discharge Low Quiescent Current: 3µA Typical Temperature Range: -40°C to +85°C Available in Pb-Free Packages: — AAT4296: 8-Pin SC70JW — AAT4298: 10-Pin SC70JW and 12-Pin TSOPJW
Applications
Cell Phones Multiple Low Power Switching Personal Communication Devices Portable Electronic Devices
• • • www.DataSheet4U.com • Rated over the -40°C to +85°C temperature range, the AAT4296 is offered in a Pb-free 8-pin SC70JW package, and the AAT4298 is offered in both a Pbfree 10-pin SC70JW and a Pb-free 12-pin TSOPJW package.
Typical Application
VCC Input
VCC
OUT1 OUT2
OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6
AAT4298
OUT3 OUT4 OUT5 EN/SET Input EN/SET GND OUT6
4296.2006.12.1.3
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Five/Six Channel Push/Pull I/O Expander Pin Descriptions
Pin #
AAT4296 AAT4298 SC70JW-10 AAT4298 TSOPJW-12
AAT4296/98
Symbol
VCC OUT2 OUT1 EN/SET
Function
Input supply voltage. Channel 2 output pin. Channel 1 output pin. Input control pin using S2Cwire serial interface. The device records rising edges of the clock and decodes them into 32 (AAT4296) or 64 (AAT4298) states controlling the ON/OFF states of the outputs. See Table 1 for output settings. In addition, a logic low forces the device into shutdown mode, reducing the supply current to less than 1µA. This pin should not be left floating. Ground. Channel 5 output pin. Channel 4 output pin. Channel 3 output pin. Channel 6 output pin. Not connected.
1 2 3 4
7 8 9 10
8 9 10 11
5 6 7 8 N/A N/A
1 3 4 5 6 2
2 3 4 5 7 1, 6, 12
GND OUT5 OUT4 OUT3 OUT6 N/C
Pin Configuration
AAT4296 SC70JW-8 (Top View) AAT4298 SC70JW-10 (Top View) AAT4298 TSOPJW-12 (Top View)
VCC OUT2 OUT1 EN/SET
1 2 3 4
8 7 6 5
OUT3 OUT4 OUT5 GND
GND N/C OUT5 OUT4 OUT3
1 2 3 4 5
10 9 8 7 6
EN/SET OUT1 OUT2 VCC OUT6
N/C GND OUT5 OUT4 OUT3 N/C
1 2 3 4 5 6
12 11 10 9 8 7
N/C EN/SET OUT1 OUT2 VCC OUT6
2
4296.2006.12.1.3
Five/Six Channel Push/Pull I/O Expander Absolute Maximum Ratings1
Symbol
VCC to GND OUTx to GND EN/SET TJ
AAT4296/98
Description
Input to GND Output (Source) to GND EN/SET to GND Operating Junction Temperature Range
Value
-0.3 to 6.0 -0.3 to VIN + 0.3 -0.3 to 6.0 -40 to +150
Units
V V V °C
Thermal Information
Symbol
θJA PD
Description
Thermal Resistance2 Maximum Power Dissipation3 SC70JW-8, SC70JW-10 TSOPJW-12 SC70JW-8, SC70JW-10 TSOPJW-12
Value
225 160 440 625
Units
°C/W mW
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Mounted on an FR4 board. 3. Derate 4.4mW/°C above 25°C. 4296.2006.12.1.3
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Five/Six Channel Push/Pull I/O Expander Electrical Characteristics1
VCC = 5.0V; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C. Symbol
VCC IQ
AAT4296/98
Description
Supply Voltage Range Quiescent Current
Conditions
EN/SET = VCC = 5V, IOUT = 0, All Switches ON EN/SET = GND, VCC = 5V, OUTx = Open VCC = 5V VCC = 3.6V VCC = 5V VCC = 3.6V
Min
1.8
Typ
3.0
Max
5.5 10 1.0
Units
V µA
On Resistance P-Channel RDS(ON) On Resistance N-Channel TCRDS TON TOFF EN/SET VEN(L) VEN(H) TEN/SET LO TEN/SET_HI_MIN TEN/SET_HI_MAX TOFF TLAT IEN/SET On Resistance Temperature Coefficient Output Turn-On Time2 Output Turn-Off Time3 Enable Threshold Low Enable Threshold High EN/SET Low Time Minimum EN/SET High Time Maximum EN/SET High Time EN/SET Off Timeout EN/SET Latch Timeout EN/SET Input Leakage
2.5 3.0 1.9 2.0 2800
6.0 7.0 6.0 7.0
Ω
ppm/°C 2.7 2.1 0.4 µs µs V V µs ns µs µs µs µA
VCC = 5V, COUT = 100nF; TA = 25°C VCC = 5V, COUT = 100nF; TA = 25°C VIN.