DS2409P-TU0026R Просмотр технического описания (PDF) - Maxim Integrated

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DS2409P-TU0026R

MicroLAN Coupler

Maxim Integrated 

AC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

Time Slot

Write 1 Low Time

Write 0 Low Time

Read Low Time

Read Data Valid

Release Time

Read Data Setup

Recovery Time

Reset Time High

Reset Time Low

Presence Detect High

Presence Detect Low

tSLOT

tLOW1

tLOW0

tLOWR

tRDV

tRELEASE

tSU

tREC

tRSTH

tRSTL

tPDH

tPDL

DS2409

(-40°C to +85°C, VDD = 5V ±10%)

MIN TYP MAX UNITS NOTES

60

120

µs

1

15

µs

60

120

µs

1

15

µs

exactly 15

µs

0

15

45

µs

1

µs

6

1

µs

480

µs

5

480

960

µs

7

15

60

µs

60

240

µs

NOTES:

1. All voltages are referenced to ground.

2. Measured with outputs open.

3. VPUP = external pullup voltage.

4. Input load is to ground.

5. An additional reset or communication sequence cannot begin until the reset high time has expired.

6. Read data setup time refers to the time the bus master must pull the I/O line low to read a bit. Data is

guaranteed to be valid within 1 µs of this falling edge.

7. The reset low time (tRSTL) should be restricted to a maximum of 960 µs, to allow interrupt signaling,

otherwise, it could mask or conceal interrupt pulses. The DS2409 may perform a power-on reset cycle

and deactivate both 1-Wire outputs if the 1-Wire input is low for minimum 8 ms. A low time of 12 ms

or more will always cause a power-on reset cycle.

8. The main output has a slew rate controlled output. The indicated current is a DC value. The sink

current typically reaches 80% of its DC value 1 µs after turning on the transistor.

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