STFPC320 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STFPC320

Front panel controller/driver with standby power management and real-time clock

STMicroelectronics 

STFPC320

Electrical characteristics

17.8 Switching characteristics

Table 20. Switching characteristics

(TA = -20 to +70 °C, VDD = 3.3V, VSS = -30V)

Symbol

Parameter

Min Typ Max Units

fSCL SCL clock frequency

0

tLOW Clock low period

1.3

tHIGH Clock high period

600

tR

SDA and SCL rise time

tF

SDA and SCL fall time

START condition hold time

tHD:STA (After this period the first clock pulse is generated) 600

START condition setup time

tSU:STA (only relevant for a repeated start condition)

600

tSU:DAT Data setup time (1)

100

tHD:DAT Data hold time

0

tSU:STO STOP condition setup time

600

tBUF

Time the bus must be free before a new

transmission can start

1.3

trec

Watchdog output pulse width

96

tUNMUTE

Time delay of turning off MUTE after READY is

set high

10

tMUTE

Time delay of turning on MUTE before STBY is

set high

10

400 kHz

μs

ns

300

ns

300

ns

ns

ns

ns

μs

ns

μs

98

ms

80

ns

80

ns

1. Transmitter must internally provide a hold time to bridge the undefined region (300ns max) of the falling

edge of the SCL.

Table 21. Switching characteristics (TA = -20 to +70 °C, VDD = 3.3V, VSS = -30V)

Symbol

Parameter

Test conditiong

Min. Typ. Max. Unit

tOSC

tPLZ

tPZL

tTZH1

tTZH2

tTHZ

CI

Oscillation frequency R = 33 kΩ ± 1%

Propagation delay

time

Rise time

Fall time

Input capacitance

CLK -> SDA

CL = 15pF, RL = 10kΩ

CL = 300pF

Seg1 to Seg12

Grid1 to Grid8,

Seg13/Grid16 to

Seg20/Grid9

CL = 300pF, Segn, Gridn

430

500

565 kHz

300 ns

100 ns

2

μs

0.5

μs

120 μs

15

pF

73/78

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