"TI-PCA9515A.pdf: I2C缓冲器，支持不同封装类型"
需积分: 0 61 浏览量
更新于2024-01-05
5
收藏 1.51MB PDF 举报
The TI-PCA9515A.pdf is a document that provides information on the I2C buffer, which is a useful device for buffering the I2C bus signals. The document specifies the pin configuration of the device in various package options, such as D, DCT, DGK, OR PW package, and DRG package.
In the D, DCT, DGK, OR PW package, the pin configuration is as follows when viewed from the top:
1. VCC: This pin is used to supply power to the device.
2. SCL1: This pin is connected to the I2C clock line from the master device.
3. SDA1: This pin is connected to the I2C data line from the master device.
4. EN: This pin is used to enable the buffer. When enabled, it allows the I2C signals to pass through.
5. N.C.: This pin stands for "No connection" and is not internally connected.
6. SCL0: This pin is connected to the I2C clock line from the slave devices.
7. SDA0: This pin is connected to the I2C data line from the slave devices.
8. GND: This pin is used as the ground reference for the device.
In the DRG package, the pin configuration is similar to the previous package, except for the absence of the N.C. pin.
The document also provides a product folder and a sample to allow users to further explore the features and functionality of the TI-PCA9515A I2C buffer.
Overall, the TI-PCA9515A.pdf is a comprehensive guide that provides essential information on the I2C buffer. It includes details on the pin configuration in different package options, allowing users to select the appropriate package for their application. The document serves as a valuable resource for understanding and utilizing the TI-PCA9515A I2C buffer effectively.
PCA9515A
www.ti.com
SCPS150D –DECEMBER 2005–REVISED JUNE 2014
6.4 Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP
(1)
MAX UNIT
V
IK
Input diode clamp voltage I
I
= –18 mA 2.3 V to 3.6 V –1.2 V
SDAx,
V
OL
Low-level output voltage I
OL
= 20 μA or 6 mA 2.3 V to 3.6 V 0.47 0.52 0.6 V
SCLx
Low-level input voltage below SDAx,
V
OL
– V
ILc
I
I
= 10 μA 2.3 V to 3.6 V 70 mV
low-level output voltage SCLx
2.7 V 0.5 3
Both channels high,
SDAx = SCLx = V
CC
3.6 V 0.5 3
Both channels low, 2.7 V 1 4
SDA0 = SCL0 = GND and
I
CC
Quiescent supply current SDA1 = SCL1 = open; or mA
3.6 V 1 4
SDA0 = SCL0 = open and
SDA1 = SCL1 = GND
2.7 V 1 4
In contention,
SDAx = SCLx = GND
3.6 V 1 4
V
I
= 3.6 V ±1
SDAx,
SCLx
V
I
= 0.2 V 3
I
I
Input current 2.3 V to 3.6 V μA
V
I
= V
CC
±1
EN
V
I
= 0.2 V –10 –20
V
I
= 3.6 V 0.5
SDAx,
I
off
Leakage current EN = L or H 0 V μA
SCLx
V
I
= GND 0.5
Leakage current during SDAx,
I
I(ramp)
V
I
= 3.6 V EN = L or H 0 V to 2.3 V 1 μA
power up SCLx
EN 3.3 V 7 9
C
in
Input capacitance V
I
= 3 V or GND pF
SDAx,
EN = H 3.3 V 7 9
SCLx
(1) All typical values are at nominal supply voltage (V
CC
= 2.5 V or 3.3 V) and T
A
= 25°C.
6.5 Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1)
V
CC
= 2.5 V V
CC
= 3.3 V
± 0.2 V ± 0.3 V
UNIT
MIN MAX MIN MAX
t
su
Setup time, EN↑ before Start condition 100 100 ns
t
h
Hold time, EN↓ after Stop condition 130 100 ns
6.6 Switching Characteristics
over recommended operating free-air temperature range, C
L
≤ 100 pF (unless otherwise noted)
V
CC
= 2.5 V ± 0.2 V V
CC
= 3.3 V ± 0.3 V
FROM TO
PARAMETER UNIT
(INPUT) (OUTPUT)
MIN TYP
(1)
MAX MIN TYP
(1)
MAX
t
PZL
45 82 130 45 68 120
SDA0, SCL0 or SDA1, SCL1 or
Propagation delay time
(2)
ns
SDA1, SCL1 SDA0, SCL0
t
PLZ
33 113 190 33 102 180
t
tHL
80% 20% 57 58
Output transition time
(2)
ns
(SDAx, SCLx)
t
tLH
20% 80% 148 147
(1) All typical values are at nominal supply voltage (V
CC
= 2.5 V or 3.3 V) and T
A
= 25°C.
(2) Different load resistance and capacitance alter the RC time constant, thereby changing the propagation delay and transition times.
Copyright © 2005–2014, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Links: PCA9515A
剩余25页未读，继续阅读
2023-02-07 上传
2023-02-01 上传
117 浏览量
2023-02-08 上传
175 浏览量
2023-02-08 上传
2023-02-08 上传
2023-02-07 上传
2023-02-07 上传
不觉明了
- 粉丝: 7733
- 资源: 5764
我的内容管理
展开
