CAT9532
16-bit Programmable LED
Dimmer with I
2
C Interface
Description
The CAT9532 is a CMOS device that provides 16−bit parallel
input/output port expander optimized for LED dimming control. The
CAT9532 outputs can drive directly 16 LEDs in parallel. Each
individual LED may be turned ON, OFF, or blinking at one of two
programmable rates. The device provides a simple solution for
dimming LEDs in 256 brightness steps for backlight and color mixing
applications. The CAT9532 is suitable in I
2
C and SMBus compatible
applications where it is necessary to limit the bus traffic or free−up the
bus master’s timer.
The CAT9532 contains an internal oscillator and two PWM signals
that drive the LED outputs. The user can program the period and duty
cycle for each individual PWM signal. After the initial set−up
command to program the Blink Rate 1 and Blink Rate 2 (frequency
and duty cycle), only one command from the bus master is required to
turn each individual open drain output ON, OFF, or cycle at Blink
Rate 1 or Blink Rate 2. Each open drain LED output can provide a
maximum output current of 25 mA. The total current sunk by all I/Os
must not exceed 400 mA.
Features
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TSSOP−24
Y SUFFIX
CASE 948AR
TQFN−24
HV6 SUFFIX
CASE 510AG
•
•
•
•
•
•
•
•
•
•
•
16 LED Drivers with Dimming Control
256 Brightness Steps
16 Open Drain Outputs Drive 25 mA Each
2 Selectable Programmable Blink Rates:
– Frequency: 0.593 Hz to 152 Hz
– Duty Cycle: 0% to 99.6%
I/Os can be Used as GPIOs
400 kHz I
2
C Bus Compatible
2.3 V to 5.5 V Operation
5 V Tolerant I/Os
Active Low Reset Input
24−Lead TSSOP and 24−pad TQFN (4 x 4 mm) Packages
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
Applications
•
•
•
•
•
Backlighting
RGB Color Mixing
Sensors Control
Power Switches, Push−buttons
Alarm Systems
©
Semiconductor Components Industries, LLC, 2016
1
October, 2016 − Rev. 5
Publication Order Number:
CAT9532/D
CAT9532
MARKING DIAGRAMS
AB
CAT9532YI
3YMXXX
LAAC
AXXX
YMCC
TQFN (HV6)
TSSOP (Y)
A
= Assembly Location
B
= Product Revision (Fixed as “B”)
CAT9532Y = Device Code
I
= Temperature Range
3
= Matte-Tin Lead Finish
Y
= Production Year (Last Digit)
M
= Production Month (1−9, O, N, D)
XXX
= Last Three Digits of
=
Assembly Lot Number
LAAC
A
XXX
Y
M
CC
= Device Code
= Assembly Location
= Last Three Digits of
=
Assembly Lot Number
= Production Year (Last Digit)
= Production Month (1−9, O, N, D)
= Country Code
=
TH = Thailand
=
MY = Malaysia
SDA
A0
A1
A2
LED0
LED1
LED2
LED3
LED4
LED5
LED6
LED7
V
SS
1
V
CC
SDA
SCL
RESET
LED15
LED14
LED13
LED12
LED11
LED9
LED8
TSSOP (Y)
(Top View)
TQFN (HV6)
(Top View)
LED10
LED8
LED6
LED7
LED9
V
SS
LED10
LED0
LED1
LED2
LED3
LED4
LED5
1
RESET
LED15
LED14
LED13
LED12
LED11
Figure 1. Pin Configurations
5V
5V
3 x 10 kW
SDA
SCL
RESET
I
2
C/SMBus
Master
SDA
SCL
RESET
VCC
RS0
RS1
RS11
LED0
LED1
CAT9532
A2
A1
A0
VSS
LED11
LED12
GPIOs
LED15
Figure 2. Typical Application Circuit
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2
SCL
V
CC
A2
A1
A0
CAT9532
Table 1. PIN DESCRIPTION
TSSOP
1
2
3
4−11
12
13−20
21
22
23
24
TQFN
22
23
24
1−8
9
10−17
18
19
20
21
A2
V
CC
POWER ON
RESET
RESET
SCL
SDA
INPUT
FILTERS
I
2
C BUS
CONTROL
LED SELECT (LSx)
REGISTER
INPUT
REGISTER
A1
A0
Pin Name
A0
A1
A2
LED0 − LED7
V
SS
LED8 − LED15
RESET
SCL
SDA
V
CC
Address Input 0
Address Input 1
Address Input 2
LED Driver Output 0 to 7, I/O Port 0 to 7
Ground
LED Driver Output 8 to 15, I/O Port 8 to 15
Reset Input
Serial Clock
Serial Data
Power Supply
Function
LEDx
PRESCALER 0
REGISTER
OSCILLATOR
V
SS
PRESCALER 1
REGISTER
PWM 1
REGISTER
PWM 0
REGISTER
BLINK 0
BLINK 1
CONTROL
LOGIC
Note: Only one I/O is shown for clarity
CAT9532
Figure 3. Block Diagram
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameters
V
CC
with Respect to Ground
Voltage on Any Pin with Respect to Ground
DC Current on I/Os
Supply Current
Package Power Dissipation Capability (T
A
= 25°C)
Junction Temperature
Storage Temperature
Lead Soldering Temperature (10 seconds)
Operating Ambient Temperature
Ratings
−0.3 to +7.0
−0.3 to +5.5
±25
400
1.0
+150
−65 to +150
300
−40 to +85
Units
V
V
mA
mA
W
°C
°C
°C
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
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CAT9532
Table 3. D.C. OPERATING CHARACTERISTICS
(V
CC
= 2.3 to 5.5 V, V
SS
= 0 V; T
A
= −40°C to +85°C, unless otherwise specified)
Symbol
SUPPLIES
V
CC
I
CC
I
stb
ΔI
stb
V
POR
(Note 1)
SCL, SDA
V
IL
(Note 2)
V
IH
(Note 2)
I
OL
I
IL
C
I
(Note 3)
C
O
(Note 3)
A0, A1, A2
V
IL
(Note 2)
V
IH
(Note 2)
I
IL
I/Os
V
IL
(Note 2)
V
IH
(Note 2)
I
OL
(Note 4)
Low Level Input Voltage
High Level Input Voltage
Low Level Output Current
V
OL
= 0.4 V; V
CC
= 2.3 V
V
OL
= 0.4 V; V
CC
= 3.0 V
V
OL
= 0.4 V; V
CC
= 5.0 V
V
OL
= 0.7 V; V
CC
= 2.3 V
V
OL
= 0.7 V; V
CC
= 3.0 V
V
OL
= 0.7 V; V
CC
= 5.0 V
I
IL
C
I/O
(Note 3)
RESET
V
IL
(Note 2)
V
IH
(Note 2)
I
IL
Low Level Input Voltage
High Level Input Voltage
Input Leakage Current
V
I
= V
CC
or V
SS
−0.3
0.7 V
CC
−1
−
−
−
0.2 V
CC
5.5
1
V
V
mA
Input Leakage Current
Input/Output Capacitance
V
CC
= 3.6 V; V
I
= V
SS
or V
CC
−0.3
2.0
9
12
15
15
20
25
−1
−
−
−
−
−
−
−
−
−
−
−
0.8
5.5
−
−
−
−
−
−
1
8
mA
pF
V
V
mA
Low Level Input Voltage
High Level Input Voltage
Input Leakage Current
−0.3
2.0
−1
−
−
−
0.8
5.5
1
V
V
mA
Low Level Input Voltage
High Level Input Voltage
Low Level Output Current
Leakage Current
Input Capacitance
Output Capacitance
V
OL
= 0.4 V
V
I
= V
CC
= V
SS
V
I
= V
SS
V
O
= V
SS
−0.3
0.7 V
CC
3
−1
−
−
−
−
−
−
−
−
0.3 V
CC
5.5
−
+1
6
8
V
V
mA
mA
pF
pF
Supply Voltage
Supply Current
Standby Current
Additional Standby Current
Power−on Reset Voltage
Operating mode; V
CC
= 5.5 V; no load;
f
SCL
= 100 kHz
Standby mode; V
CC
= 5.5 V; no load;
V
I
= V
SS
or V
CC
, f
SCL
= 0 kHz
Standby mode; V
CC
= 5.5 V; every
LED I/O = V
IN
= 4.3 V, f
SCL
= 0 kHz
V
CC
= 3.3 V, No load;
V
I
= V
CC
or V
SS
2.3
−
−
−
−
−
250
2.1
−
1.5
5.5
550
5.0
2
2.2
V
mA
mA
mA
V
Parameter
Conditions
Min
Typ
Max
Unit
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
1. V
CC
must be lowered to 0.2 V in order to reset the device.
2. V
IL
min and V
IH
max are reference values only and are not tested.
3. This parameter is characterized initially and after a design or process change that affects the parameter. Not 100% tested.
4. The output current must be limited to a maximum 25 mA per each I/O; the total current sunk by all I/O must be limited to 400 mA.
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CAT9532
Table 4. A.C. CHARACTERISTICS
(V
CC
= 2.3 V to 5.5 V, T
A
= −40°C to +85°C, unless otherwise specified) (Note 5)
Standard I
2
C
Symbol
F
SCL
t
HD:STA
t
LOW
t
HIGH
t
SU:STA
t
HD:DAT
t
SU:DAT
t
R
(Note 6)
t
F
(Note 6)
t
SU:STO
t
BUF
(Note 6)
t
AA
t
DH
T
i
(Note 6)
PORT TIMING
t
PV
t
PS
t
PH
RESET
t
W
(Note 6)
t
REC
t
RESET
(Note 7)
Reset Pulse Width
Reset Recovery Time
Time to Reset
20
0
400
ns
ns
ns
Output Data Valid
Input Data Setup Time
Input Data Hold Time
100
1
200
ns
ns
ms
Clock Frequency
START Condition Hold Time
Low Period of SCL Clock
High Period of SCL Clock
START Condition Setup Time
Data In Hold Time
Data In Setup Time
SDA and SCL Rise Time
SDA and SCL Fall Time
STOP Condition Setup Time
Bus Free Time Between STOP and START
SCL Low to Data Out Valid
Data Out Hold Time
Noise Pulse Filtered at SCL and SDA Inputs
100
50
4
4.7
3.5
50
50
4
4.7
4
4.7
0
250
1000
300
0.6
1.3
0.9
Parameter
Min
Max
100
0.6
1.3
0.6
0.6
0
100
300
300
Min
Fast I
2
C
Max
400
Units
kHz
ms
ms
ms
ms
ms
ns
ns
ns
ms
ms
ms
ns
ns
5. Test conditions according to “AC Test Conditions” table.
6. This parameter is characterized initially and after a design or process change that affects the parameter. Not 100% tested.
7. The full delay to reset the part will be the sum of t
RESET
and the RC time constant of the SDA line.
Table 5. AC TEST CONDITIONS
Input Pulse Voltage
Input Rise and Fall Times
Input Reference Voltage
Output Reference Voltage
Output Load
t
F
t
LOW
SCL
t
SU:STA
t
HD:STA
SDA IN
t
AA
SDA OUT
t
DH
t
BUF
t
HD:DAT
t
SU:DAT
t
SU:STO
0.2 V
CC
to 0.8 V
CC
≤5
ns
0.3 V
CC
, 0.7 V
CC
0.5 V
CC
Current source: I
OL
= 3 mA; 400 pF for f
SCL(max)
= 400 kHz
t
HIGH
t
LOW
t
R
Figure 4. 2−Wire Serial Interface Timing
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