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參數(shù)資料
| 型號(hào)： | MAX7323AEE+ |
| 廠(chǎng)商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 16/17頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER I2C 4B 16QSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 接口： | I²C |
| 輸入/輸出數(shù)： | 4 |
| 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(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-QSOP |
| 包裝： | 管件 |
| 包括： | POR |
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MAX7323
and AD0 to V+ or GND (shown in bold in Table 3).
These selections are guaranteed to be correct at
power-up, independent of SDA and SCL behavior. If
one of the other 12 address combinations is used, an
unexpected combination of pullups might be asserted
until the first I2C transmission (to any device, not neces-
sarily the MAX7323) is put on the bus.
I/O Port Inputs
I/O port inputs switch at the CMOS logic levels as
determined by the expander’s supply voltage, and are
overvoltage tolerant to +6V, independent of the
expander’s supply voltage.
I/O Port Input Transition Detection
All four I/O ports configured as inputs are monitored for
changes since the expander was last accessed
through the serial interface. The state of the I/O ports is
stored in an internal “snapshot” register for transition
monitoring. The snapshot is continuously compared
with the actual input conditions, and if a change is
detected for any port input, INT is asserted to signal a
state change. An internal transition flag is set for that
port. The input ports are sampled (internally latched
into the snapshot register) and the old transition flags
cleared during the I2C acknowledge of every MAX7323
read and write access. The previous port transition
flags are read through the serial interface as the sec-
ond byte of a 2-byte read sequence.
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 input port data, alternating with 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 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.
Port Outputs
Write 1 byte to the MAX7323 to set the output port lev-
els for the four push-pull outputs, and the four open-
drain I/O ports simultaneously.
I2C Port Expander with 4 Push-Pull Outputs
and 4 Open-Drain I/Os
8
_______________________________________________________________________________________
PIN
CONNECTION
DEVICE ADDRESS
OUTPUTS POWER-UP DEFAULT
40k
Ω INPUT PULLUPS ENABLED
AD2
AD0
A6
A5
A4
A3
A2
A1
A0
O7
O6
P5
P4
P3
P2
O1
O0 O7 O6
P5
P4
P3
P2 O1 O0
SCL
GND
1
1000001
11
1
0
Y
—
SCL
V+
1
1000011
11
1
Y
SCL
1
1000101
11
1
Y
SCL
SDA
1
1000111
11
1
Y
SDA
GND
1
1001001
11
1
0
Y
—
SDA
V+
1
1001011
11
1
Y
SDA
SCL
1
1001101
11
1
Y
SDA
1
1001111
11
1
Y
GND
1
1010000
00
0
—
GND
V+
1
1010010
00
0
1
—
Y
GND
SCL
1
1010100
00
0
1
—
Y
GND
SDA
1
1010110
00
0
1
—
Y
V+
GND
1
1011001
11
1
0
Y
—
V+
1
1011011
11
1
Y
V+
SCL
1
1011101
11
1
Y
V+
SDA
1
1011111
11
1
Pullups
are
not
enabled
for
push-pull
outputs.
Y
YYY
Pullups
are
not
enabled
for
push-pull
outputs.
Table 3. MAX7323 Address Map
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7323AEE+ | 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/4 P-P Out & 4 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 |
| MAX7323AEE+T | 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/4 P-P Out & 4 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 |
| MAX7323AEE-T | 功能描述:接口-I/O擴(kuò)展器 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 |
| MAX7323ATE | 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/4 P-P Out & 4 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 |
| MAX7323ATE+ | 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/4 P-P Out & 4 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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