CAT9552
16-Channel I
2
C-bus LED
Driver with Programmable
Blink Rate
Description
The CAT9552 is a 16−channel, parallel input/output port expander
optimized for LED On/Off and blinking control. Each individual LED
may be turned ON, OFF, or set to blinking at one of two programmable
rates. The CAT9552 is compatible with I
2
C and SMBus applications
where it is desireable to limit the bus traffic or free−up the bus master’s
internal timer. Three address pins allow up to eight CAT9552 devices
to occupy the same bus.
The CAT9552 contains an internal oscillator and two PWM signals,
which drive the LED outputs. The user may program the period and
duty cycle for each individual PWM signal. After an 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 sink a
maximum current of 25 mA. The total continuous current sunk by all
I/Os must not exceed 200 mA per package.
Features
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SOIC−24
W SUFFIX
CASE 751BK
TSSOP−24
Y SUFFIX
CASE 948AR
•
16 LED Drivers with On/Off and Programmable Blink Rate Control
•
2 Selectable, Programmable Blink Rates:
•
•
•
•
•
•
•
•
– Frequency: 0.172 Hz to 44 Hz
– Duty Cycle: 0% to 99.6%
16 Open Drain Outputs Drive 25 mA Each
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 SOIC, TSSOP and 24−pad TQFN (4 x 4 mm) Packages
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Office Machines
Appliance Control Panels
Alarm Systems
Point of Sale Displays
TQFN−24
HV6 SUFFIX
CASE 510AG
TQFN−24
HT6 SUFFIX
CASE 510AN
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 16 of this data sheet.
Applications
•
•
•
•
©
Semiconductor Components Industries, LLC, 2011
December, 2011
−
Rev. 0
1
Publication Order Number:
CAT9552/D
CAT9552
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
LED10
LED9
LED8
LED0
LED1
LED2
LED3
LED4
LED5
1
SCL
V
CC
A2
A1
A0
RESET
LED15
LED14
LED13
LED12
LED11
V
SS
SOIC (W), TSSOP (Y)
(Top View)
TQFN (HV6, HT6)
(Top View)
Figure 1. Pin Configurations
5V
5V
3 x 10 kW
SDA
SCL
RESET
I
2
C/SMBus
Master
Notes:
LED0 to LED11 are shown being
used as LED drivers
LED12 to LED15 are used as
standard GPIOs
SDA
SCL
RESET
VCC
RS0
RS1
RS11
LED0
LED1
CAT9552
A2
A1
A0
VSS
LED11
LED12
GPIOs
LED15
Figure 2. Typical Application Circuit
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2
LED10
LED6
LED7
LED8
LED9
CAT9552
Table 1. PIN DESCRIPTION
SOIC / 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
Pad
Pin Name
A0
A1
A2
LED0
−
LED7
V
SS
LED8
−
LED15
RESET
SCL
SDA
V
CC
Backside pad
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
For enhanced heat dissipation. Electrically this
pad must be at ground potential.
Function
A2
V
CC
RESET
SCL
SDA
INPUT
FILTERS
A1
A0
POWER ON
RESET
I
2
C BUS
CONTROL
INPUT
REGISTER
LED SELECT (LSx)
REGISTER
LEDx
PRESCALER 0
REGISTER
PRESCALER 1
REGISTER
PWM 0
REGISTER
PWM 1
REGISTER
BLINK 0
BLINK 1
CONTROL
LOGIC
OSCILLATOR
V
SS
Note: Only one I/O is shown for clarity
CAT9552
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
−2.0
to +7.0
−0.5
to +5.5
±25
200
1.0
+150
−65
to +150
300
−40
to +85
Units
V
V
mA
mA
W
°C
°C
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
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CAT9552
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)
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
SCL, SDA, RESET
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)
1.
2.
3.
4.
Input Leakage Current
Input/Output Capacitance
V
CC
= 3.6 V; V
I
= V
SS
or V
CC
−0.5
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
−0.5
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
−0.5
0.7 V
CC
3
−1
−
−
−
−
−
−
−
−
0.3 V
CC
5.5
−
+1
6
8
V
V
mA
mA
pF
pF
V
DD
must be lowered to 0.2 V in order to reset the device.
V
IL
min and V
IH
max are reference values only and are not tested.
This parameter is characterized initially and after a design or process change that affects the parameter. Not 100% tested.
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 200 mA (or 100 mA
for eight I/Os)
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CAT9552
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
10
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
100
4
4.7
3.5
50
100
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
SDA IN
t
AA
SDA OUT
t
DH
t
BUF
t
HD:STA
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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