SN7325.pdf 데이터시트 (총 12 페이지) - 파일 다운로드 SN7325 데이타시트 다운로드

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SN7325
Multi-function I/O Drive
General Description
The SN7325 2-wire serial-interfaced peripheral features
16 I/O ports. Ports are divided into eight push pull I/Os
and eight open-drain I/Os and transition detection.
Any of the 16 I/O ports can be configured as an input or
an output. All I/O ports configured as inputs are
continuously monitored for state changes (transition
_______
detection). State changes are indicated by the INT output.
The interrupt is latched, allowing detection of transient
changes. When the SN7325 is subsequently read through
the serial interface, any pending interrupt is cleared.
The open-drain outputs are rated to sink 20mA at 0.26V
________
headroom, and are capable of driving LEDs. The RST
input clears the serial interface, terminating any I2C
communication to or from the SN7325. The SN7325 uses
two address inputs to allow 4 I2C slave addresses. The
slave address also determines the power-up logic state for
the I/O ports.
Features
„ 400kHz I2C Serial Interface
„ 2.4V to 5.5V Operation
„ 8 Push-Pull I/O ports
„ 8 Open-Drain I/O Ports, Rated to 20mA Sink
Current at 0.26V headroom
„ Selectable I/O Port Power-Up Default Logic States
_______
„ INT Output Alerts Change on Inputs
„ Low 0.3μA (typ) Standby Current
„ -40°C to +125°C Temperature Range
Applications
„ Cell Phones
„ Notebooks
„ SAN/NAS
„ Satellite Radio
„ Servers
„ Automotive
Typical Application Circuit
2.8V
SCL
SDA
INT
RST
4.7k
4.7k
4.7k
SCL
SDA
INT
RST
100k
AD1
AD0
GND
Vbat
1uF
Vcc PP0
PP1
PP2
PP3
PP4
PP5
PP6
PP7
OD0
OD1
OD2
OD3
OD4
OD5
OD6
OD7
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
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Functional Block Diagram
AD0
AD1
SCL
SDA
Input
Filter
I2C
Control
Power-on
RST Reset
I/O
Ports
SN7325
OD7
OD6
OD5
OD4
OD3
OD2
OD1
OD0
PP7
PP6
PP5
PP4
PP3
PP2
PP1
PP0
INT
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Pin Configurations
Package
WQFN-24
Pin Configurations (Top View)
PP0 1
PP1 2
PP2 3
PP3 4
OD0 5
OD1 6
18 AD0
17 PP7
16 PP6
15 PP5
14 PP4
13 OD7
SN7325
Pin Description
Pin
1~4, 14~17
5~8, 10~13
9
18,24
19
20
21
22
23
Pin
PP0~PP7
OD0~OD7
GND
AD0,AD1
SCL
SDA
VCC
_______
INT
________
RST
Description
CMOS Push-Pull I/O Ports
Open-Drain I/O Ports
Ground
Address Inputs. Select device slave address with AD0 and AD1.
I2C-Compatible Serial-Clock Input
I2C-Compatible Serial-Data I/O
Positive Supply Voltage. Bypass VCC to GND with a ceramic
capacitor of at least 0.1μF.
_______
Interrupt Output, Active Low. INT is an open-drain output.
_________
Reset Input, Active Low. Drive R S T low to clear the 2-wire
interface.
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SN7325
Absolute Maximum Ratings (All voltages referenced to GND)
Supply Voltage ……………………………-0.3V to 6.0V Continuous Power Dissipation (TA = 70°C)
________ _______
SCL, SDA, AD0, AD1, RST, INT, OD0-OD7………….
……………………………………………….-0.3V to 6V
PP0–PP7 .........................................-0.3V to (VCC + 0.3V)
PP Source Output Current ....................................+100mA
PP, OD Sink Current ..............................................120mA
SDA Sink Current.................................................... 10mA
24-Pin WQFN (derate 33.2mW/°C over 70°C) …………
……………………………………..………………2.65W
Operating Temperature Range ...............-40°C to +125°C
Junction Temperature................................................150°C
Storage Temperature Range ......................-65°C to 150°C
Lead Temperature (soldering, 10s) ........................+300°C
_______
INT Sink Current.....................................................10mA
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only and functional operation of the device at these or any other condition beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability
Ordering Information
Order Number
SN7325A424E
Package Type
WQFN-24
Operating Temperature range
-40 °C to +125°C
SN7325 □ □ □ □
Environmental Code
E: Lead Free
Pin Code
24: 24pins
Package Type
4: WQFN, 4mm×4mm
Temperature Code
A: Automotive, -40°C to +125°C
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Electrical Characteristics
(VCC = 2.4V to 5.5V, unless otherwise noted. Typical values are at VCC = 3.3V, TA = 25°C.) (Note 1)
Symbol
Parameter
Condition
Min. Typ.
VCC Supply Voltage
TA = -40°C to +125°C
2.4
VPOR
ISTB
I+
VIH
Power-On-Reset Voltage
Standby Current
(Interface Idle)
Supply Current
(Interface Running)
Input High-Voltage
SDA, SCL, AD0, AD1,
________
RST, OD0~OD7,
PP0~PP7
VCC falling, Temp = -40°C
VCC falling, Temp = -20°C
SCL and SDA
and other digital
inputs at VCC
TA = -40°C to
+125°C
fSCL=400kHz;
other digital
inputs at VCC
TA = -40°C to
+125°C
1.4
0.3
8
Input Low-Voltage
VIL SDA, SCL, AD0, AD1,
________
RST, OD0~OD7, PP0~PP7
IIH, IIL
Input Leakage Current
SDA, SCL, AD0, AD1,
________
RST, OD0~OD7, PP0~PP7
________
SDA, SCL, AD0, AD1, RST,
OD0~OD7, PP0~PP7 at VCC or
GND.
-0.2
Input Capacitance
CIN SDA, SCL, AD0, AD1,
________
RST, OD0~OD7, PP0~PP7
(Note3)
10
VOL
Output Low Voltage,
PP0~PP7, OD0~OD7
VOH
Output High Voltage
PP0~PP7
VCC = 2.5V, ISINK = 10mA
VCC = 3.3V, ISINK = 15mA
VCC = 5.0V, ISINK = 20mA
VCC = 2.5V, ISOURCE = 5mA
VCC = 3.3V, ISOURCE = 5mA
VCC = 5.0V, ISOURCE = 10mA
VCC -316
VCC -213
VCC -289
VOLSDA
V _______
OLINT
Output Low-Voltage SDA
_______
Output Low-Voltage INT
ISINK = 6mA
ISINK = 5mA
SN7325
Max.
5.5
2.35
2.3
1.9
Units
V
V
μA
20 μA
V
0.4 V
+0.2 μA
pF
200
240 mV
250
mV
180 mV
180 mV
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