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PDF PCA9553DP02 Data sheet ( Hoja de datos )
| Número de pieza | PCA9553DP02 | |
| Descripción | 4-bit I2C LED driver with programmable blink rates | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
PCA9553
4-bit I2C LED driver with programmable
blink rates
Product data sheet
Supersedes data of 2003 May 02
2004 Oct 01
Philips
Semiconductors
1 page  
Philips Semiconductors
4-bit I2C LED driver with programmable blink rates
Product data sheet
PCA9553
PWM1 — PWM REGISTER 1
bit 7 6 5 4 3 2 1 0
default 1 0 0 0 0 0 0 0
The PWM1 register determines the duty cycle of BLINK1. The
outputs are LOW (LED off) when the count is less than the value in
PWM1 and HIGH when it is greater. If PWM1 is programmed with
00h, then the PWM1 output is always LOW.
The duty cycle of BLINK1 is:
256 – PWM1
256
LS0 — LED SELECTOR
LED3
LED2
LED 1
LED 0
bit 7 6 5 4 3 2 1 0
default 0 1 0 1 0 1 0 1
The LSx LED select registers determine the source of the LED data.
00 = Output is set LOW (LED on)
01 = Output is set Hi-Z (LED off – default)
10 = Output blinks at PWM0 rate
11 = Output blinks at PWM1 rate
PINS USED AS GENERAL PURPOSE I/Os
LED pins not used to control LEDs can be used as general purpose
I/Os.
For use as input: Set LEDx to high-impedance (01) and then read
the pin state via the input register.
For use as output: Connect external pull-up resistor to the pin and
size it according to the DC recommended operating characteristics.
LED output pin is HIGH when the output is programmed as
high-impedance, and LOW when the output is programmed LOW
through the “LED selector” register. The output can be pulse-width
controlled when PWM0 or PWM1 are used.
POWER-ON RESET
When power is applied to VDD, an internal Power-On Reset holds
the PCA9553 in a reset condition until VDD has reached VPOR. At
this point, the reset condition is released and the PCA9553 registers
are initialized to their default states, with all outputs in the off state.
Thereafter, VDD must be lowered below 0.2 V to reset the device.
2004 Oct 01
5
5 Page 
Philips Semiconductors
4-bit I2C LED driver with programmable blink rates
Product data sheet
PCA9553
ABSOLUTE MAXIMUM RATINGS
In accordance with the Absolute Maximum Rating System (IEC 134)
SYMBOL
PARAMETER
VDD
VI/O
II/O
ISS
Ptot
Tstg
Tamb
Supply voltage
DC voltage on an I/O
DC output current on an I/O
Supply current
Total power dissipation
Storage temperature range
Operating ambient temperature
CONDITIONS
MIN
–0.5
VSS – 0.5
—
—
—
–65
–40
MAX
6.0
5.5
±25
100
400
+150
+85
UNIT
V
V
mA
mA
mW
°C
°C
HANDLING
Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe, it is desirable to take
precautions appropriate to handling MOS devices. Advice can be found in Data Handbook IC24 under ”Handling MOS devices”.
DC CHARACTERISTICS
VDD = 2.3 V to 5.5 V; VSS = 0 V; Tamb = –40 °C to +85 °C; unless otherwise specified. TYP at 3.3 V and 25 °C.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
Supplies
VDD Supply voltage
IDD Supply current
Istb Standby current
∆IDD
Additional standby current
VPOR Power-on reset voltage (Note 1)
Input SCL; input/output SDA
Operating mode; VDD = 5.5 V; no load;
VI = VDD or VSS; fSCL = 100 kHz
Standby mode; VDD = 5.5 V; no load;
VI = VDD or VSS; fSCL = 100 kHz
Standby mode; VDD = 5.5 V; Every
LED I/O at VIN = 4.3 V; fSCL = 0 kHz
No load; VI = VDD or VSS
2.3
—
—
—
—
—
350
1.9
—
1.7
5.5
500
3.0
325
2.2
VIL
VIH
IOL
IL
CI
I/Os
LOW-level input voltage
HIGH-level input voltage
LOW-level output current
Leakage current
Input capacitance
VOL = 0.4 V
VI = VDD = VSS
VI = VSS
–0.5
0.7VDD
3
–1
—
—
—
6.5
—
3.7
0.3VDD
5.5
—
+1
5
VIL LOW-level input voltage
–0.5 —
0.8
VIH HIGH-level input voltage
2.0 —
5.5
VOL = 0.4 V; VDD = 2.3 V; Note 2
9—
—
VOL = 0.4 V; VDD = 3.0 V; Note 2
12 —
—
IOL LOW-level output current
VOL = 0.4 V; VDD = 4.5 V; Note 2
VOL = 0.7 V; VDD = 2.3 V; Note 2
15 —
15 —
—
—
VOL = 0.7 V; VDD = 3.0 V; Note 2
20 —
—
VOL = 0.7 V; VDD = 4.5 V; Note 2
25 —
—
IL Input leakage current
VDD = 3.6 V; VI = 0 V or VDD
–1 —
1
CIO Input/output capacitance
— 2.1
5
NOTES:
1. VDD must be lowered to 0.2 V in order to reset part.
2. Each I/O must be externally limited to a maximum of 25 mA and the device must be limited to a maximum current of 100 mA.
UNIT
V
µA
µA
µA
V
V
V
mA
µA
pF
V
V
mA
mA
mA
mA
mA
mA
µA
pF
2004 Oct 01
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet PCA9553DP02.PDF ] | |
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