参数资料
型号: PCA9539BS,118
厂商: NXP Semiconductors
文件页数: 9/37页
文件大小: 0K
描述: IC I/O EXPANDER I2C 16B 24HVQFN
产品培训模块: I²C Bus Fundamentals
特色产品: NXP - I2C Interface
标准包装: 1
接口: I²C,SM 总线
输入/输出数: 16
中断输出:
频率 - 时钟: 400kHz
电源电压: 2.3 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-VFQFN 裸露焊盘
供应商设备封装: 24-HVQFN(4x4)
包装: 标准包装
包括: POR
产品目录页面: 825 (CN2011-ZH PDF)
其它名称: 568-1841-6
PCA9539_PCA9539R
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 6 February 2013
17 of 37
NXP Semiconductors
PCA9539; PCA9539R
16-bit I2C-bus and SMBus low power I/O port with interrupt and reset
8.1 Minimizing IDD when the I/Os are used to control LEDs
When the I/Os are used to control LEDs, they are normally connected to VDD through a
resistor as shown in Figure 16. Since the LED acts as a diode, when the LED is off the I/O
VI is about 1.2 V less than VDD. The supply current, IDD, increases as VI becomes lower
than VDD.
Designs needing to minimize current consumption, such as battery power applications,
should consider maintaining the I/O pins greater than or equal to VDD when the LED is off.
Figure 17 shows a high value resistor in parallel with the LED. Figure 18 shows VDD less
than the LED supply voltage by at least 1.2 V. Both of these methods maintain the I/O VI
at or above VDD and prevents additional supply current consumption when the LED is off.
9.
Limiting values
Fig 17. High value resistor in parallel with
the LED
Fig 18. Device supplied by a lower voltage
002aac189
LED
VDD
LEDn
100 k
Ω
VDD
002aac190
LED
VDD
LEDn
3.3 V
5 V
Table 13.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Conditions
Min
Max
Unit
VDD
supply voltage
0.5
+6.0
V
VI/O
voltage on an input/output pin
VSS 0.5 6
V
IO
output current
on an I/O pin
-
50
mA
II
input current
-
20
mA
IDD
supply current
-
160
mA
ISS
ground supply current
-
200
mA
Ptot
total power dissipation
-
200
mW
Tstg
storage temperature
65
+150
C
Tamb
ambient temperature
operating
all devices except PCA9539PW/Q900
40
+85
C
PCA9539PW/Q900
40
+125
C
Tj(max)
maximum junction temperature
-
125
C
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