參數(shù)資料
型號： PCA9621D,118
廠商： NXP Semiconductors
文件頁數(shù)： 18/18頁
文件大小： 0K
描述： IC BUS OUTPUT PORT 2WIRE 16SOIC
產(chǎn)品培訓(xùn)模塊： I²C Bus Fundamentals
特色產(chǎn)品： NXP - I2C Interface
標(biāo)準(zhǔn)包裝： 1
接口： I²C 總線，SM 總線
輸入/輸出數(shù)： 8
中斷輸出： 無
頻率 - 時鐘： 1MHz
電源電壓： 2.7 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SO
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： 568-6671-6
PCA9621
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1 — 9 March 2011
9 of 18
NXP Semiconductors
PCA9621
65 mA 8-bit 2-wire bus output port
11. Application information
Figure 11 shows the PCA9621 in conjunction with the PCA9646 bus multiplexer in a LED
drive application. Each PCA9621 can drive 8 LEDs, and using the address pins on the IC,
up to 8 uniquely addressed devices can sit on one bus branch. The PCA9646 has four
such outputs, giving 256 LEDs in the structure shown.
By additionally using the address pins on the PCA9646, the entire structure may be
repeated 8 times, allowing 2048 LEDs to be uniquely driven. By additionally placing
PCA9646’s in series (refer to the PCA9646 data sheet), the structure may be further
extensively multiplied into a huge array.
Fig 11. PCA9621 in a large LED array
002aaf397
BUS MASTER
U2
VDD
SCL
SDA
R8
SC0
SD0
SCL
SDA
PCA9646
VDD
SC0
SD0
U1
RESET
5 V
SCL
SD
A
V
DD
PCA9621
U3
SCL
SD
A
V
DD
U10
R7
R1
R2
SC2
SD2
SC2
SD2
R3
R4
SC3
SD3
SC3
SD3
R5
R6
buses SC2/SD2, SC3/SD3
as shown for
SC0/SD0, SC1/SD1
Entire structure can be repeated
8 times using PCA9646 address pins
(further expansion possible).
A0
A1
A2
VSS
R10
SC1
SD1
SC1
SD1
SCL
SD
A
V
DD
PCA9621
U11
SCL
SD
A
V
DD
U18
R9
8
P[7:0]
8 LEDs
8
P[7:0]
8 LEDs
8
× PCA9621
each with
8 LEDs = 64 LEDs
PCA9621
8
P[7:0]
8 LEDs
PCA9621
8
P[7:0]
8 LEDs
8
× PCA9621
each with
8 LEDs = 64 LEDs
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