Rainbow-electronics DS2431 Manual do Utilizador descarregar pdf (Página 2)

DS2431: 1024-Bit, 1-Wire EEPROM

2 of 23

ABSOLUTE MAXIMUM RATINGS

I/O Voltage to GND -0.5V, +6V

I/O Sink Current 20mA

Operating Temperature Range -40°C to +85°C

Junction Temperature +150°C

Storage Temperature Range -40°C to +85°C

Soldering Temperature See IPC/JEDEC J-STD-020A

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 conditions beyond those indicated in the operational sections of the specifications is

not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

PUP

= 2.8V to 5.25V, T

= -40°C to +85°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

I/O PIN GENERAL DATA

1-Wire Pullup Resistance

PUP

(Notes 1, 2)

0.3 2.2

kΩ

Input Capacitance C

(Notes 3, 4) 100 800 pF

Input Load Current I

I/O pin at V

PUP

0.05 2.2 µA

High-to-Low Switching

Threshold

(Notes 4, 5, 6) 0.5 4.1 V

Input Low Voltage V

(Notes 1, 7) 0.3 V

Low-to-High Switching

Threshold

(Notes 4, 5, 8) 1.0 4.9 V

Switching Hysteresis V

(Notes 4, 5, 9) 0.22 1.70 V

Output Low Voltage V

At 4mA (Note 10) 0.4 V

Standard speed, R

PUP

= 2.2kΩ

Overdrive speed, R

PUP

= 2.2kΩ

Recovery Time

(Notes 1,11)

REC

Overdrive speed, directly prior to reset

pulse; R

PUP

= 2.2kΩ

µs

Standard speed (Note 12) 0.5 5.0

Rising-Edge Hold-off Time t

REH

Overdrive speed Not applicable (0)

µs

Standard speed 65

Timeslot Duration (Note 1) t

SLOT

Overdrive speed (Note 13) 9

µs

I/O PIN, 1-WIRE RESET, PRESENCE DETECT CYCLE

Standard speed, V

PUP

> 4.5V 480 640

Standard speed (Note 12) 504 640

Overdrive speed, V

PUP

> 4.5V 48 80

Reset Low Time (Note 1) t

RSTL

Overdrive speed (Note 13) 53 80

µs

Standard speed, V

PUP

> 4.5V 15 60

Standard speed (Note 13) 15 63

Presence Detect High

Time

PDH

Overdrive speed (Note 13) 2 7

µs

Standard speed, V

PUP

> 4.5V 1.1 3.75

Standard speed 1.1 7

Presence Detect Fall Time

(Notes 4, 14)

FPD

Overdrive speed 1.1

µs

Standard speed 60 240

Overdrive speed, V

PUP

> 4.5V 8 24

Presence Detect Low

Time

PDL

Overdrive speed (Note 13) 8 26

µs

Standard speed, V

PUP

> 4.5V 64 75

Standard speed 70 75

Presence Detect Sample

Time (Note 1)

MSP

Overdrive speed 8.1 10

µs

1 2 3 4 5 6 7 ... 22 23

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