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參數(shù)資料
| 型號(hào)： | MAX7324ATG+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 20/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 24TQFN-EP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 接口： | I²C |
| 輸入/輸出數(shù)： | 8 |
| 中斷輸出： | 是 |
| 頻率 - 時(shí)鐘： | 400kHz |
| 電源電壓： | 1.71 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 24-TQFN-EP（4x4） |
| 包裝： | 帶卷 (TR) |
| 包括： | POR |
MAX7324
I2C Port Expander with Eight Push-Pull Outputs
and Eight Inputs
_______________________________________________________________________________________
9
A long read sequence (more than 2 bytes) can be used
to poll the expander continuously without the overhead
of resending the slave address. If more than 2 bytes
are read from the expander, the expander repeatedly
returns the 2 bytes of input port data followed by the
transition flags. The inputs are repeatedly resampled
and the transition flags repeatedly reset for each pair of
bytes read. All changes that occur during a long read
sequence are detected and reported.
The MAX7324 includes an 8-bit interrupt mask register
that selects which inputs generate an interrupt upon
change. Each input’s transition flag is set when its input
changes, independent of the interrupt mask register
settings. The interrupt mask register allows the proces-
sor to be interrupted for critical events, while the inputs
and the transition flags can be polled periodically to
detect less critical events.
The INT output is not reasserted during a read
sequence to avoid recursive reentry into an interrupt
service routine. Instead, if a data change occurs that
would normally cause the INT output to be set, the INT
assertion is delayed until the STOP condition. INT is not
reasserted upon a STOP condition if the changed input
data is read before the STOP occurs. The INT logic
ensures that unnecessary interrupts are not asserted,
yet data changes are detected and reported no matter
when the change occurs.
Transition-Detection Masks
The transition detection logic incorporates a transition
flag and an interrupt mask bit for each input port. The
eight transition flags can be read through the serial
interface, and the 8-bit interrupt mask is set through the
serial interface.
Each port’s transition flag is set when that port’s input
changes, and the change flag remains set even if the
input returns to its original state. The port’s interrupt
mask determines whether a change on that input port
generates an interrupt. Enable interrupts for high-priori-
ty inputs using the interrupt mask. The interrupt allows
the system to respond quickly to changes on these
inputs. Poll the MAX7324 periodically to monitor less-
important inputs. The transition flags indicate whether a
permanent or transient change has occurred on any
input since the MAX7324 was last accessed.
PIN CONNECTION
DEVICE ADDRESS
OUTPUTS POWER-UP DEFAULT
AD2
AD0
A6
A5
A4
A3
A2
A1
A0
O15
O14
O13
O12
O11
O10
O9
O8
SCL
GND
1010000
111
10
00
0
SCL
V+
1010001
111
11
1
SCL
1010010
111
11
1
SCL
SDA
1010011
111
11
1
SDA
GND
1010100
111
10
00
0
SDA
V+
1010101
111
11
1
SDA
SCL
1010110
111
11
1
SDA
1010111
111
11
1
GND
1011000
000
00
0
GND
V+
1011001
000
01
11
1
GND
SCL
1011010
000
01
11
1
GND
SDA
1011011
000
01
11
1
V+
GND
1011100
111
10
00
0
V+
1011101
111
11
1
V+
SCL
1011110
111
11
1
V+
SDA
1011111
111
11
1
Table 3. MAX7324 Address Map for Outputs O8–O15
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7324EVCMAXQU+ | 功能描述:界面開發(fā)工具 Maxim Evaluation System RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| MAX7324EVKIT+ | 功能描述:界面開發(fā)工具 Evaluation Kit/Evaluation System for the MAX7324 RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| MAX7325 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os |
| MAX7325_12 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os |
| MAX7325AEG | 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/8 P-P Out & 8 I/O RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
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