PCA9551 Philips Semiconductors, PCA9551 Datasheet - Page 20

• Manufacturer Part Number: PCA9551
• Description: 8-bit I2C LED driver with programmable blink rates
• Manufacturer: Philips Semiconductors

Philips Semiconductors
REVISION HISTORY
2004 Oct 01
Rev
_5
_4
_3
_2
8-bit I
2
Date
20041001
20030505
20030224
20020927
C LED driver with programmable blink rates
Description
Product data sheet (9397 750 13726). Supersedes data of 2003 May 05 (9397 750 11462).
Modifications:
Product data (9397 750 11462); ECN 853-2343 29858 dated 24 April 2003.
Supersedes data of 24 February 2003 (9397 750 11155).
Product data (9397 750 11155); ECN 853-2343 29331 of 20 December 2002;
supersedes data of 2002 Sep 09 (9397 750 10328).
Product data (9397 750 10328); ECN 853-2343 28878 of 09 September 2002.
“Features” section on page 2:
– second bullet: change from “... between 0.15625 and 40 Hz (6.4 and 0.025 seconds)” to “... between
“Register description” section on page 5:
– section “PCS0—Frequency Prescaler 0”: remove “... and PCA953x LED Dimmers” from Note 1 (2 places).
– section “PCS1—Frequency Prescaler 1”: remove “... and PCA953x LED Dimmers” from Note 1 (2 places).
Add note to section “Input—Input Register” on page 5
Add section “Pins used as General Purpose I/Os” on page 6.
Section “Power-on Reset” on page 6 re-written.
Section “External Reset” on page 6: second paragraph changed from “This input requires a pull-up resistor to
V
Figure 13 on page 10: add resistor values
DC Characteristics table on page 12: add (new) Note 1 and its reference at V
Add Figures 20 and 21.
DD
0.148 Hz and 38 Hz (6.74 and 0.026 seconds)”
.” to “This input requires a pull-up resistor to V
20
DD
if no active connection is used.”.
POR
.
PCA9551
Product data sheet