SN7325 Si-En, SN7325 Datasheet

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SN7325

Manufacturer Part Number
SN7325
Description
Multi Function I/O Driver
Manufacturer
Si-En
Datasheet

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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
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 I
communication to or from the SN7325. The SN7325 uses
two address inputs to allow 4 I
slave address also determines the power-up logic state for
the I/O ports.
Typical Application Circuit
Jan. 2009, Ver1.0
SDA
SCL
RST
INT
2
C slave addresses. The
100k
4.7k
2.8V
4.7k
4.7k
_______
AD1
AD0
GND
SCL
SDA
INT
RST
output.
________
2
C
Vbat
1
Vcc
Features
Applications
1uF
400kHz I
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
Low 0.3μA (typ) Standby Current
-40°C to +125°C Temperature Range
Cell Phones
Notebooks
SAN/NAS
Satellite Radio
Servers
Automotive
OD0
OD1
OD2
OD3
OD4
OD5
OD6
OD7
PP0
PP1
PP2
PP3
PP4
PP5
PP6
PP7
Output Alerts Change on Inputs
2
C Serial Interface
Multi-function I/O Drive
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
SI-EN technology
SN7325

SN7325 Summary of contents

Page 1

... 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 I communication to or from the SN7325. The SN7325 uses two address inputs to allow 4 I slave address also determines the power-up logic state for the I/O ports ...

Page 2

... Functional Block Diagram AD0 AD1 SCL SDA RST Jan. 2009, Ver1.0 I2C Input Filter Control Power-on Reset 2 SN7325 OD7 OD6 OD5 OD4 OD3 I/O OD2 OD1 OD0 Ports PP7 PP6 PP5 PP4 PP3 PP2 PP1 PP0 INT SI-EN technology ...

Page 3

... INT Interrupt Output, Active Low. INT Reset Input, Active Low. Drive ________ RST 3 AD0 18 PP7 17 PP6 16 PP5 15 PP4 14 13 OD7 Description Open-Drain I/O Ports Ground to GND with a ceramic CC _______ is an open-drain output. _________ low to clear the 2-wire interface. SI-EN technology SN7325 ...

Page 4

... Storage Temperature Range ......................-65°C to 150°C Lead Temperature (soldering, 10s) ........................+300°C Package Type WQFN-24 □ □ □ Environmental Code E: Lead Free Pin Code 24: 24pins Package Type 4: WQFN, 4mm×4mm Temperature Code A: Automotive, -40°C to +125°C 4 Operating Temperature range -40 °C to +125°C SI-EN technology SN7325 ...

Page 5

... CC SOURCE V = 3.3V 5mA CC SOURCE V = 5.0V 10mA CC SOURCE I = 6mA SINK _______ I = 5mA SINK 5 = 3.3V 25°C.) (Note 1) A Min. Typ. Max. 2.4 5.5 2.35 2.3 0.3 1.9 8 1.4 0.4 ________ , -0.2 +0.2 10 200 240 250 V -316 CC V -213 CC V -289 CC 180 180 SI-EN technology SN7325 Units V V μA 20 μ μ ...

Page 6

... Max. C ≤ 100pF L C ≤ 100pF ≤ 100pF ≤ 100pF L C ≤ 100pF L IL and t measured between 0.3 × SI-EN technology SN7325 Max. Units 400 kHz μs μs μs μs 0.9 μs ns μs μs 300 ns 300 ns 250 ns ns 400 pF ns μs ...

Page 7

... Hi Hi-Z function Input port A (OD0~OD7) Input port B (PP0~PP7) Output port A Output port B Port A configuration Port B configuration Port A interrupt control Port B interrupt control 7 SN7325 Hi-Z Hi Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Power-up default ...

Page 8

... Jan. 2009, Ver1.0 Figure 1. 2-Wire Serial Interface Timing Details Figure 2. START and STOP Conditions Figure 3. Bit Transfer 8 SN7325 SI-EN technology ...

Page 9

... I/O state is stable, clear the interrupt control register to enable the input transition detection function programmed to flag Accessing the SN7325 Serial Addressing The SN7325 operates as a slave that sends and receives data through a 2-wire interface. The interface uses a _______ is cleared serial data line (SDA) and a serial clock line (SCL) to achieve bidirectional communication between master(s) and slave(s) ...

Page 10

... FROM SLAVE Figure 5.Writing to the SN7325 PP7 ACKNOWLEDGE FROM SN7325 0 AD1 AD0 R/W PORT SNAPSHOT PSU IR Figure 6.Reading I/O Ports of SN7325 Data Byte ACKNOWLEDGE FROM SLAVE PORT I/O PP6 ...

Page 11

... INT desserts during the slave address acknowledge. When the master reads one byte from the I/O ports of the SN7325 and subsequently issues a STOP condition (Figure 6), the SN7325 transmits the current port data, clears the change flags, and resets the transition detection ...

Page 12

... Package Information: Top View Side View Jan. 2009, Ver1.0 WQFN-24 TSLP MAX 0.800 A NOM 0.750 MIN 0.700 12 SN7325 Bottom View SI-EN technology ...

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