LM5064PMHSLASHNOPB datasheet(53/64 Pages) TI2

53 / 64 page

SCL

VIH

VIL

VIH

VIL

SDA

tHD;DAT

tSU;STO

tHD;STA

tSU;STA

tSU;DAT

tHIGH

tBUF

tLOW

LM5064

www.ti.com

SNVS718E – JUNE 2011 – REVISED FEBRUARY 2013

SMBUS COMMUNICATIONS TIMING REQUIREMENTS

Figure 20. SMBus Timing Diagram

Table 45. SMBus Timing Definition

Symbol

Parameter

Limits

Units

Comments

Min

Max

FSMB

SMBus Operating Frequency

400

kHz

TBUF

Bus free time between Stop and Start Condition

1.3

µs

THD:STA

Hold time after (Repeated) Start Condition. After this

0.6

µs

period, the first clock is generated.

TSU:STA

Repeated Start Condition setup time

0.6

µs

TSU:STO

Stop Condition setup time

0.6

µs

THD:DAT

Data hold time

TSU:DAT

Data setup time

100

TTIMEOUT

Clock low time-out

(1)

TLOW

Clock low period

1.5

µs

THIGH

Clock high period

0.6

µs

(2)

TLOW:SEXT

Cumulative clock low extend time (slave device)

(3)

TLOW:MEXT

Cumulative low extend time (master device)

(4)

Clock or Data Fall Time

300

(5)

Clock or Data Rise Time

300

(5)

(1)

Devices participating in a transfer will timeout when any clock low exceeds the value of TTIMEOUT,MIN of 25 ms. Devices that have

detected a timeout condition must reset the communication no later than TTIMEOUT,MAX of 35 ms. The maximum value must be adhered

to by both a master and a slave as it incorporates the cumulative stretch limit for both a master (10ms) and a slave (25ms).

(2)

THIGH MAX provides a simple method for devices to detect bus idle conditions.

(3)

TLOW:SEXT is the cumulative time a slave device is allowed to extend the clock cycles in one message from the initial start to the stop. If

a slave exceeds this time, it is expected to release both its clock and data lines and reset itself.

(4)

TLOW:MEXT is the cumulative time a master device is allowed to extend its clock cycles within each byte of a message as defined from

start-to-ack, ack-to-ack, or ack-to-stop.

(5)

Rise and fall time is defined as follows:•

TR = ( VILMAX – 0.15) to (VIHMIN + 0.15)• TF = 0.9 VDD to (VILMAX – 0.15)

Submit Documentation Feedback

Product Folder Links: LM5064

LM5064PMH/NOPB Datasheet(PDF) 53 Page - Texas Instruments

LM5064PMH/NOPB Datasheet(HTML) 53 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

Datasheet Download

Link URL