ST485ABDR datasheet(8/19 Pages) STMICROELECTRONICS

部件名	ST485ABDR

功能描述	Very high speed low power RS-485/RS-422 transceiver

PDF	19 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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8 / 19 page

Electrical characteristics

ST485A

8/19

4.5

Receiver switching

(VCC = 4.5V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are

referred to TA = 25°C, VCC = 5V) (See Note: 1, 3)

Note:

All currents into device pins are positive; all currents out of device pins are negative; all

voltages are referenced to device ground unless specified.

Applies to peak current. See typical Operating Characteristics.

3tr=tf ≤ 6ms.

Table 10.

Driver switching characteristics

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

tPLH

tPHL

Propagation Delay

CL = 15pF

tRPDS

|tPLH - tPHL| Propagation delay skew CL = 15pF

0.5

tPZL

Output enable time

CRL = 15pF, S1 Closed

tPZH

Output enable time

CRL = 15pF, S2 Closed

tPHZ

Output disable time

CRL = 15pF, S2 Closed

tPLZ

Output disable time

CRL = 15pF, S1 Closed

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