Datasheet > STR485E

STR485E

更新时间： 2023-12-20 18:46:30

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
26页	1378K
描述
3.3V RS485，兼容1.8V I/O，可选择速度20Mbps或250kbps

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STR485E 数据手册

STR485E

Electrical characteristics

Table 9. Driver: over recommended operating conditions (unless otherwise specified. Please, see

"Operating conditions" table)

Symbol

Parameter

Test conditions

DC driver/ DC

Min.

Typ.

Max.

Unit

Driver input, driver enable,

and receiver enable input

current

-2

µA

R = 60 Ω, 375 Ω on

1.5

each output to –7 V to

Driver differential output

voltage magnitude

RL = 54 Ω (RS-485)

RL = 100 Ω (RS-422)

1.5

T ≥ 0 °C, V ≥ 3.2

Change in magnitude of

driver differential output

voltage

Δ|V

RL = 54 Ω, CL = 50 pF

-50

Steady-state common-

mode output voltage

°C(SS)

Change in differential

driver output common-

mode voltage

ΔV

Center of two 27-Ω

load resistors

-50

°C

Peak-to-peak driver

common-mode output

voltage

500

°C(PP)

Driver/switching characteristics, SLR='1', 250 kbps, bit time ≥ 4 µs

Driver differential output

rise/fall time

t , t

0.05

0.4

0.2

Driver propagation delay

time

, t

1.5

PHL PLH

R =54 Ω, C =50 pF

Driver pulse skew, |t

–

PHL

µs

0.3

0.035

1.2

SK(P)

PLH

, t

Driver disable time

0.017

0.7

PLZ PHZ

Receiver enabled

C =50 pF with 110 kΩ

, t

Driver enable time

PLZ PZH

Receiver disabled

C =50 pF with 110 kΩ

1.64

2.4

Driver/switching characteristics, SLR= '0', 20 Mbps, bit time ≥ 50 ns

Driver differential output

rise/fall time

t , t

, t

Driver propagation delay

R =54 Ω, C =50 pF

PHL PLH

Driver pulse skew, |t

–

µs

PHL

SK(P)

PLH

, t

Driver disable time

Driver enable time

PLZ PHZ

Receiver enabled

Receiver disabled

, t

PZL PZH

2.4

DS13051 - Rev 4

page 9/26

1...6 7 8910 11 12...26

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