Analogic AAT4292IJQ-T1 Seven channel high-side i/o expanderimage Datasheet

PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
General Description
Features
The AAT4292 SmartSwitchTM is a member of AnalogicTech’s
Application Specific Power MOSFETTM (ASPMTM) product
family. The AAT4292 has seven P-channel MOSFETs
configured for use as a high side microprocessor GPIO
expander powered from a common supply source.
Operating over a 1.8V to 5.5V range, the AAT4292 is
ideal for portable Li-Ion/Polymer powered products. The
state of each output channel is controlled with a single
GPIO line via the EN/SET pin using AnalogicTech’s Simple
Serial Control™ (AS2Cwire™) interface.
•
•
•
•
•
VIN Range: 1.8V – 5.5V
7 Independent Output Channels
1.1Ω RDS(ON) per Channel
User Programmable AS2Cwire Interface
Low Quiescent Current
▪ 6.3μA Operational
▪ 0.1μA in shutdown
• -40°C to +85°C Temperature Range
• Available in SC70JW-10 Package
The switch states are controlled by AnalogicTech’s Simple
Serial Control (AS2Cwire) interface which permits ease of
control and efficiency of size. The quiescent supply
current is very low, typically 6.3μA. In shutdown mode,
the supply current is reduced to less than 1μA.
Applications
The AAT4292 is offered in a Pb-free, 10-pin SC70JW
package specified over the -40°C to +85°C temperature
range.
• Cell Phone Keypad, Backlight And Fashion Lighting
Control
• I/O Expander
• Media Players
• Multiple Channel Low Power Switching
• Portable Electronic Devices
Typical Application
Input Voltage Supply
VIN
CIN
1μF
OUT1
Output 1
OUT2
Output 2
OUT3
Output 3
AAT4292
Control Logic
EN/SET
OUT4
Output 4
OUT5
Output 5
OUT6
Output 6
OUT7
Output 7
GND
4292.2008.08.1.0
www.analogictech.com
1
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Pin Descriptions
Symbol
Pin #
OUT4
OUT5
OUT6
OUT7
GND
1
2
3
4
5
EN/SET
6
OUT1
OUT2
OUT3
7
8
9
VIN
10
Function
P-channel MOSFET drain; Channel 4 output pin.
P-channel MOSFET drain; Channel 5 output pin.
P-channel MOSFET drain; Channel 6 output pin.
P-channel MOSFET drain; Channel 7 output pin.
Ground connection.
Input control pin using AS2Cwire serial interface. The device records rising edges of the clock, and
decodes them into 128 states controlling the ON/OFF states of the outputs. See Table 1 and Table 2 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.
P-channel MOSFET drain; Channel 1 output pin.
P-channel MOSFET drain, Channel 2 output pin.
P-channel MOSFET drain, Channel 3 output pin.
Input supply voltage. VIN is connected to the P-channel MOSFET common sources. Connect a 1μF ceramic capacitor from VIN to GND.
Pin Configuration
SC70JW-10
(Top View)
OUT4
OUT5
OUT6
OUT7
GND
2
1
10
2
9
3
8
4
7
5
6
VIN
OUT3
OUT2
OUT1
EN/SET
www.analogictech.com
4292.2008.08.1.0
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Absolute Maximum Ratings1
Symbol
VIN
VOUT
VEN/SET
IMAX
TJ
VESD
Description
VIN to GND
OUT to GND
EN/SET to GND
Maximum Continuous Switch Current
Operating Junction Temperature Range
ESD Rating – HBM2
Value
Units
-0.3 to 6.0
-0.3 to VIN + 0.3
-0.3 to 6.0
250
-40 to 150
4000
V
V
V
mA
°C
V
Value
Units
225
440
°C/W
mW
Thermal Information
Symbol
ΘJA
PD
Description
Thermal Resistance
Maximum Power Dissipation4 (TA = 25°C)
3
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. Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor to each pin.
3. Mounted on a FR4 board.
4. Derate 4.4mW/°C above 25°C.
4292.2008.08.1.0
www.analogictech.com
3
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Electrical Characteristics1
VIN = 5.0V, TA = -40°C to 85°C unless otherwise noted. Typical values are TA = 25°C.
Symbol
Description
Conditions
Power Supply and MOSFETs
VIN
Operation Voltage
IQ
Quiescent Current
ISD(OFF)
Shutdown Current
RDS(ON)
P-Channel High-Side MOSFET
On-State Resistance
Min
Output Turn-On Delay Time2
Turn-On Rise Time
Output Turn-Off Delay Time3
Control Logic (EN/SET)
VEN(L)
Enable Threshold Low
VEN(H)
Enable Threshold High
tLO
EN/SET Low Time
tHI
tOFF
tLAT
ISINK
Minimum EN/SET High Time
EN/SET Off Timeout
EN/SET Latch Timeout
EN/SET Input Leakage Current
Max
Units
5.5
V
6.3
10
μA
0.1
1.1
1.2
1.5
2.5
2800
1.0
1.7
1.8
2.2
3.8
μA
1.8
EN/SET = VIN = 5V, IOUTn = 0, All
Switches ON
EN/SET = GND, VIN = 5V, OUTn = 0
VIN = 5.0V, IOUTn = 100mA, TA = 25oC
VIN = 4.2V, IOUTn = 100mA, TA = 25oC
VIN = 3.0V, IOUTn = 100mA, TA = 25oC
VIN = 1.8V, IOUTn = 100mA, TA = 25oC
TCRDS
On-State Resistance Temperature Coefficient
Switch Timing
tD(ON)
tR
tD(OFF)
Typ
VIN = 5V, RLOAD = 500Ω, COUT = 100nF
VIN = 5V, RLOAD = 500Ω, COUT = 100nF
VIN = 5V, RLOAD = 500Ω
VIN = 1.8V
VIN = 5.5V
VEN/SET < 0.4V
VIN ≤ 2.5V
VIN > 2.5V
VEN/SET = 5.5V
ppm/°C
40
270
40
ns
0.4
1.6
100
1.3
1.15
0.01
Ω
500
250
4.0
4.0
1.0
V
V
ns
ns
μs
μs
μA
1. The AAT4292 is guaranteed to meet performance specification over the –40°C to +85°C operating temperature range, and is assured by design, characterization and correlation with statistical process controls.
2. tD(ON) is the time after latch timeout to 90% of the output voltage.
3. tD(OFF) is the time after off timeout to 10% of the output voltage.
4
www.analogictech.com
4292.2008.08.1.0
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Typical Characteristics
Unless otherwise noted, VIN = 5.0V, CIN = 1μF, COUTn = 0.1μF, TA = 25°C.
Quiescent Current vs. Input Voltage
Quiescent Current vs. Temperature
8
Quiescent Current (µA)
Quiescent Current (µA)
8
7
6
5
4
3
2
7
6
5
4
3
VIN = 5.0V
VIN = 3.3V
2
1.5
2
2.5
3
3.5
4
4.5
5
-40
5.5
-15
10
Input Voltage (V)
35
60
85
Temperature (°C)
VEN(H) and VEN(L) vs. Input Voltage
RDS(ON) vs. Input Voltage
1.5
2.7
1.4
2.5
1.3
2.3
1.2
RDS(ON) (Ω
Ω)
VEN(H) and VEN(L) (V)
(IOUT1-7 = 100mA)
1.1
1
0.9
0.8
0.7
0.5
1.5
2
2.5
3
3.5
4
4.5
5
2.1
1.9
1.7
1.5
1.3
1.1
VEN(H)
VEN(L)
0.6
RDS1
RDS2
RDS3
RDS4
RDS5
RDS6
RDS7
0.9
0.7
1.5
5.5
2
2.5
1.4
1.4
1.3
1.3
1.2
1.2
1.1
RDS1
RDS2
RDS3
RDS4
RDS5
RDS6
RDS7
1
0.9
0.8
0.7
0.6
-15
10
35
4.5
5
5.5
60
1.1
RDS1
RDS2
RDS3
RDS4
RDS5
RDS6
RDS7
1
0.9
0.8
0.7
0.6
85
0.5
-40
Temperature (°C)
4292.2008.08.1.0
4
RDS(ON) vs. Temperature
(VIN = 5.0V; IOUT1-7 = 10mA)
RDS(ON) (Ω
Ω)
RDS(ON) (Ω
Ω)
RDS(ON) vs. Temperature
(VIN = 5.0V; IOUT1-7 = 100mA)
-40
3.5
Input Voltage (V)
Input Voltage (V)
0.5
3
-15
10
35
60
85
Temperature (°C)
www.analogictech.com
5
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Typical Characteristics
Unless otherwise noted, VIN = 5.0V, CIN = 1μF, COUTn = 0.1μF, TA = 25°C.
EN/SET Latch Timeout vs. Temperature
EN/SET Off Timeout vs. Temperature
1.5
VIN = 5.0V
VIN = 3.3V
Off Timeout, tOFF (µs)
Latch Timeout, tLAT (µs)
1.4
1.3
1.2
1.1
VIN = 5.0V
VIN = 3.3V
1.4
1.3
1.2
1.1
1
-40
-15
10
35
60
85
-40
Temperature (°C)
-15
10
35
60
85
Temperature (°C)
EN/SET Timeout vs. Input Voltage
Turn-On Characteristic
(VIN = 5V; RL2 = RL6 = RL7 = 50Ω
Ω; CO2 = CO6 = CO7 = 0.1µF)
1.8
Off Timeout
Latch Timeout
Timeout (µs)
1.7
VOUT7
(5V/div)
1.6
1.5
VOUT6
(5V/div)
1.4
1.3
VOUT2
(5V/div)
1.2
1.1
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
EN/SET
(5V/div)
Input Voltage (V)
Turn-On Characteristic
Time (2µs/div)
Turn-On Characteristic
(VIN = 5V; RL2 = RL6 = RL7 = 50Ω
Ω; CO2 = CO6 = CO7 = 0.1µF)
(VIN = 5V; RL2 = RL6 = RL7 = 50Ω
Ω; CO2 = CO6 = CO7 = 0.1µF)
VOUT7
(5V/div)
VOUT7
(5V/div)
VOUT6
(5V/div)
VOUT6
(5V/div)
VOUT2
(5V/div)
VOUT2
(5V/div)
EN/SET
(5V/div)
EN/SET
(5V/div)
Time (10µs/div)
6
Time (10µs/div)
www.analogictech.com
4292.2008.08.1.0
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Typical Characteristics
Unless otherwise noted, VIN = 5.0V, CIN = 1μF, COUTn = 0.1μF, TA = 25°C.
Turn-On Characteristic
Turn-On Characteristic
(VIN = 5V; RL2 = RL6 = RL7 = 50Ω
Ω; CO2 = CO6 = CO7 = 0.1µF)
(VIN = 5V; RL2 = RL6 = RL7 = 50Ω
Ω; CO2 = CO6 = CO7 = 0.1µF)
VOUT7
(5V/div)
VOUT6
(5V/div)
VOUT7
(5V/div)
VOUT6
(5V/div)
VOUT2
(5V/div)
VOUT2
(5V/div)
EN/SET
(5V/div)
EN/SET
(5V/div)
Time (10µs/div)
Transition of Outputs
Time (10µs/div)
Turn-Off Characteristic
(VIN = 5V; RL2 = RL6 = RL7 = 50Ω
Ω; CO2 = CO6 = CO7 = 0.1µF)
(VIN = 5V; RL2 = RL6 = RL7 = 50Ω
Ω; CO2 = CO6 = CO7 = 0.1µF)
VOUT7
(5V/div)
VOUT7
(5V/div)
VOUT6
(5V/div)
VOUT6
(5V/div)
VOUT2
(5V/div)
VOUT2
(5V/div)
EN/SET
(5V/div)
EN/SET
(5V/div)
Time (10µs/div)
4292.2008.08.1.0
Time (10µs/div)
www.analogictech.com
7
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Functional Block Diagram
VIN
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
Logic Control
and Level Shift
UVLO
ROM
EN/SET
AS2Cwire Interface
GND
Functional Description
The AAT4292 consists of seven P-channel MOSFET power
switches designed for I/O expansion applications. The
device operates with input voltages ranging from 1.8V to
5.5V which, along with its extremely low operating current, makes it ideal for battery-powered applications. In
cases where the input voltage drops below 1.8V, the
AAT4292 MOSFETs are protected from entering the linear
region of operation by automatically shutting down.
8
In addition, the TTL-compatible EN/SET pin makes the
AAT4292 an ideal level-shifted load switch. An optional
slew rate controlling feature eliminates inrush current
when a MOSFET is turned on, allowing the AAT4292 to
be implemented with a small input capacitor or no
capacitor at all, while maintaining isolation between
channels. During slewing, the current ramps linearly
until it reaches the level required for the output load
condition. The proprietary control method works by
careful control and monitoring of the MOSFET gate volt-
www.analogictech.com
4292.2008.08.1.0
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
age. When the device is switched ON, the gate voltage
is quickly increased to the threshold level of the MOSFET.
Once at this level, the current begins to slew as the gate
voltage is slowly increased until the MOSFET becomes
fully enhanced. Once it has reached this point, the gate
is quickly increased to the full input voltage and RDS(ON) is
minimized.
AS2Cwire Serial Interface
The ON/OFF states of the seven MOSFET switches are
controlled by the EN/SET serial clock input. An internal
control counter is clocked on the rising edges of the EN/
SET pin and is decoded into 128 possible states of the
MOSFET (see Table 1 and Table 2). The counter can be
clocked at speeds up to 1MHz, but the count value is not
latched until clocking has stopped and the EN/SET pin
has remained high for the tLAT timeout (approximate
1.15μs typical). The first rising edge of EN/SET enables
the AAT4292 and is counted as the first clock.
AS2Cwire relies on the number of rising edges of the EN/
SET pin to address and load the registers, as illustrated
in Figure 1. AS2Cwire latches data (1 to 32 edges) or
address (33 to 36 edges) after the EN/SET pin has been
held high for time tLAT. The interface records rising edges
of the EN/SET pin and decodes them into one of four
addresses corresponding to the address table (Table 1),
or 1 of 32 data settings corresponding to the switch code
table (Table 2). The combined address and data is used
to decode one of 128 possible switch states. Address and
Data are differentiated by the number of rising edges on
the EN/SET pin. 1 to 32 rising edges signifies Data, and
33 to 36 rising edges signifies Address. The counter can
be clocked at speeds up to 1MHz, such that intermediate
states are not visible. The first rising edge of EN/SET
enables the IC and turns the switches OUT3-OUT7 on.
Once the final clock cycle is received, the EN/SET pin is
held high to maintain the device setting. The device is
disabled after the EN/SET pin transitions to a logic low
state for tOFF timeout (approximate 1.3μs typical).
There are four address switch bank in AAT4292, which is
selected by the corresponding rising edges 33 to 36,
after remaining the EN/SET high for the tLAT timeout,
then the clock number is latched and the relevant
address switch bank (0 to 3) is asserted. Next, the corresponding rising edges of Data from 1 to 32 can be
serial submitted, and closed by the EN/SET remaining
high for tLAT timeout. After the timeout tLAT, the outputs
status is updated accordingly.
The AAT4292 is disabled after the EN/SET pin has transitioned and remained in a logic low for tOFF timeout, and
the quiescent current drops to 0.1μA typically.
The ON/OFF states of the seven output channels are controlled by the EN/SET serial data input. An internal control counter is clocked on the rising edge of the EN/SET
pin and is decoded into one of 128 possible states using
a short address and data word (see Tables 1 and 2).
Address Code
Address Switch
Bank Code
EN/SET
Rising Edges
0
1
2
3
33
34
35
36
Table 1: AS2Cwire Address Table.
4292.2008.08.1.0
www.analogictech.com
9
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Data Code
Address Data OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 Address Data OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
Address Data OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 Address Data OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
Table 2: AS2Cwire Data Code Table.
10
www.analogictech.com
4292.2008.08.1.0
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Application Information
Thermal Considerations
The AAT4292 is designed to deliver continuous output
load currents. Due to its high integration, care must be
taken in designing for higher load conditions. If greater
loads are required, outputs can be tied together to
deliver higher power to a given load.
For the thermal calculation, assuming that the total current capability of the seven channels is ITOTAL, each chanI
nel has the same current which is IOUT = TOTAL
7 , then
2
PTOTAL = 7IOUT2RDS(ON) = 7
ITOTAL
RDS(ON) = PD - PDERATE(TA - 25)
7
Where:
PD = 440mW when TA = 25°C
PDERATE = 4.4mW/°C
RDS(ON) = 1.7Ω (maximum) when VIN = 5.0V
For example, at 25oC ambient, the AAT4292 power capability is PTOTAL = 440mW, then ITOTAL ≅ 1.35A at VIN = 5.0V.
The current capability for each channel is IOUT = 192mA.
At 85oC ambient, the AAT4292 power capability is PTOTAL
= 440 - (85 - 25)4.4 = 176mW, then ITOTAL ≅ 0.85A at VIN
= 5.0V. The current capability for each channel is IOUT =
121mA.
Output Sequencing
If output sequencing is not necessary, then a pulse burst
of 33 address clocks followed by 1 data clock will switch
on all of the outputs simultaneously. Alternately, the
OUT3 to OUT7 will be switched on simultaneously on the
first rising edge of the EN/SET pin after the tLAT timeout.
4292.2008.08.1.0
Output sequencing is accomplished via a series of pulses
on the EN/SET pin. Each time a new pulse burst is
asserted on EN/SET, the AAT4292 internal clock counter
starts to count and sends the counted clock number to
the register. After the tLAT timeout, the internal clock
counter is reset and waits for the next pulse burst. For
example, to sequence the outputs in order from OUT1 to
OUT7, seven clock bursts are input on the EN/SET pin.
From Table 1 and Table 2, the first bust of 34 address
clocks followed by 32 data clocks turns on OUT1. The
next burst of 33 address clocks followed by 32 data
clocks will add OUT2. Then the burst of 33 address
clocks followed by 16 data clocks will add OUT3; the
burst of 33 address clocks followed by 8 data clocks will
add OUT4; the burst of 33 address clocks followed by 4
data clocks will add OUT5; the burst of 33 address clocks
followed by 2 data clocks will add OUT6; the burst of 33
address clocks followed by 1 data clock will add OUT7.
Likewise, the outputs can be turned on/off in any order
by adding the corresponding clock bursts.
Input Capacitor
Normally, the input capacitor value could be ten times
that of the total load capacitors. If the device outputs
OUT1 to OUT7 have capacitor loads, depending on the
load capacitor value, it is recommended that a 1μF to
10μF 0603 or 0805 ceramic capacitor be placed as close
as possible between VIN and GND. For example, if the
capacitor load at each output is 0.1μF, the Murata
GRM21BR61C106K ceramic capacitor (10μF/16V/0805/
X5R) or a similar capacitor could be used. This helps to
provide a low impendence loop to charge the load capacitors during the MOSFET switches' turn-on transient and
keep the VIN voltage stable.
www.analogictech.com
11
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Timing Diagram
Address
Data
T LAT
TLAT
THI
TLO
EN/SET
1
2
32
33(34,35,36)
1
2
n≤32
OUT1 To OUT2
00 (or previous state )
11( or 10,01,00 )
00000 (or previous state )
32-n
Figure 1: AS2Cwire Timing Diagram.
Application Circuits
VIN : 1.8V to 5.5V
VIN
AAT4292
OUT1
1
EN/SET
OUT2
System
μController
OUT3
GPIO 2
OUT4
GPIO 3
OUT5
GPIO 4
OUT6
GPIO 5
OUT7
EN 1
EN 2
EN 3
EN 4
EN 5
EN 6
EN 7
Function 1
Function 2
Function 3
Function 4
Function 5
Function 6
Function 7
GPIO 6
GPIO 7
GPIO 2 to GPIO 7 are now
free for other uses
Figure 2: GPIO I/O Expander
(condense seven GPIO control lines to one).
12
www.analogictech.com
4292.2008.08.1.0
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
CIN
AAT4292IJS
SC70JW-10 2x2mm
1μF
1
Battery +
2
3
Battery -
4
R4
R5
R6
R7
LED4
LED5
LED6
LED7
5
OUT4
10
VIN
OUT5
OUT3
OUT6
OUT2
OUT7
8
7
OUT1
GND
GND
9
6
EN/SET
R1
R2
R3
LED1
LED2
LED3
R8
100k
GND
GND
Clock
Figure 3: Keypad, Backlighting, or Fashion Lighting Control.
Evaluation Board Schematic
J1
Input Voltage
VCC
JP1
DC+
C9
3
2
1
U1
DC-
10μF
1
CON 1
2
TP4
3
TP5
4
TP6
R4
330Ω
R5
330Ω
C5
0.1μF
C4
0 .1 μF
LED4
R6
330Ω
TP7
R7
330 Ω
C7
0 .1μF
C6
0.1μF
LED5
5
OUT4
VIN
OUT5
OUT 3
OUT6
OUT 2
OUT7
OUT 1
GND
EN /SET
GND
10
9
8
TP3
7
TP2
6
TP1
R1
330Ω
C1
0.1 μF
AAT4292
LED6
LED1
LED7
LED2
R3
R2
330Ω
330Ω
C2
0 .1μF
C3
0.1μF
LED3
R8
100kΩ
GND
GND
GND
JP2
U2
OSC1
R13
330Ω
R9
1kΩ
C8
R10
1kΩ
1
2
3
4
R 11
1kΩ
GND
1μF
SW3
LED8
VDD
GP5
GP4
GP3
VSS
GP0
GP1
GP2
8
7
6
5
GND
20MHz
PIC12F675
SW2
TP8 _GND
SW1
GND
Figure 4: AAT4292 Evaluation Board Schematic.
4292.2008.08.1.0
www.analogictech.com
13
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Evaluation Board Layout
Figure 5: AAT4292 Evaluation Board Layout
Top Layer (not to scale).
14
Figure 6: AAT4292 Evaluation Board Layout
Bottom Layer (not to scale).
www.analogictech.com
4292.2008.08.1.0
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Ordering Information
Package
Marking1
Part Number (Tape & Reel)2
SC70JW-10
4WXYY
AAT4292IJQ-T1
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor
products that are in compliance with current RoHS standards, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. For more information, please visit our website at
http://www.analogictech.com/about/quality.aspx.
Packaging Information
SC70JW-10
2.20 ± 0.20
1.75 ± 0.10
0.40 BSC
0.225 ± 0.075
Top View
0.100
7° ± 3°
0.45 ± 0.10
4° ± 4°
0.05 ± 0.05
0.15 ± 0.05
1.10 MAX
0.85 ± 0.15
2.00 ± 0.20
2.10 ± 0.30
Side View
End View
All dimensions in millimeters.
1. XYY= assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
4292.2008.08.1.0
www.analogictech.com
15
PRODUCT DATASHEET
AAT4292
SmartSwitchTM
Seven Channel High-Side I/O Expander
Advanced Analogic Technologies, Inc.
3230 Scott Boulevard, Santa Clara, CA 95054
Phone (408) 737-4600
Fax (408) 737-4611
© Advanced Analogic Technologies, Inc.
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual
property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. Except as provided in AnalogicTech’s terms and
conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer’s applications, adequate
design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to
support this warranty. Specific testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other
brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.
16
www.analogictech.com
4292.2008.08.1.0
Similar pages