PCA9553D/01 NXP Semiconductors, PCA9553D/01 Datasheet - Page 6

• Manufacturer Part Number: PCA9553D/01
• Description: LED Drivers LED DRVR 4BIT I2C
• Manufacturer: NXP Semiconductors

Specifications of PCA9553D/01

• Number Of Segments: 4
• Low Level Output Current: 25000 uA (Min)
• Operating Supply Voltage: 2.3 V to 5.5 V
• Maximum Supply Current: 500 uA
• Maximum Power Dissipation: 400 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-96
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PCA9553D/01,112

NXP Semiconductors
PCA9553_6
Product data sheet
7.3.1 INPUT - Input register
7.3.2 PSC0 - Frequency Prescaler 0
7.3.3 PWM0 - Pulse Width Modulation 0
7.3 Register descriptions
Table 4.
The INPUT register reflects the state of the device pins. Writes to this register will be
acknowledged but will have no effect.
Table 5.
Remark: The default value ‘X’ is determined by the externally applied logic level (normally
logic 1) when used for directly driving LED with pull-up to V
PSC0 is used to program the period of the PWM output.
The period of BLINK0 = (PSC0 + 1) / 44.
Table 6.
The PWM0 register determines the duty cycle of BLINK0. The outputs are LOW (LED off)
when the count is less than the value in PWM0 and HIGH when it is greater. If PWM0 is
programmed with 00h, then the PWM0 output is always LOW.
The duty cycle of BLINK0 = (256
Table 7.
B2
0
0
0
0
1
1
Bit
Symbol
Default
Bit
Symbol
Default
Bit
Symbol
Default
B1
0
0
1
1
0
0
INPUT[7]
Control register definition
INPUT - Input register description
PSC0 - Frequency Prescaler 0 register description
PSC0[7]
PWM0 - Pulse Width Modulation 0 register description
PWM0
[7]
7
1
7
1
7
0
B0
0
1
0
1
0
1
PSC0[6]
Rev. 06 — 29 December 2008
INPUT[6]
PWM0
[6]
6
1
6
0
Register name
INPUT
PSC0
PWM0
PSC1
PWM1
LS0
6
0
4-bit I
PSC0[5]
PWM0
INPUT[5]
[5]
5
1
5
0
PWM0) / 256.
5
0
2
C-bus LED driver with programmable blink rates
PSC0[4]
PWM0
INPUT[4]
[4]
4
1
4
0
Type
read
read/write
read/write
read/write
read/write
read/write
4
0
PSC0[3]
PWM0
[3]
3
1
3
0
LED3
X
3
DD
PSC0[2]
PWM0
.
LED2
[2]
2
2
0
1
Register function
input register
frequency prescaler 0
PWM register 0
frequency prescaler 1
PWM register 1
LED selector
X
2
PCA9553
PSC0[1]
© NXP B.V. 2008. All rights reserved.
PWM0
LED1
[1]
1
1
1
0
X
1
PSC0[0]
PWM0
LED0
[0]
0
1
0
0
6 of 26
X
0