st485ec STMicroelectronics, st485ec Datasheet
st485ec
Available stocks
Related parts for st485ec
st485ec Summary of contents
Page 1
... ST485EBDR - °C ST485EXDR -55 to 125 °C February 2008 ST485EC - ST485EX ±15 kV ESD protected, low power RS-485/RS-422 transceiver Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that place the driver outputs into a high-impedance state. ...
Page 2
Contents 1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 3
Pin configuration Figure 1. Pin connections (top view) Table 2. Pin description Pin n° Symbol GND Receiver output Receiver output enable Driver output enable ...
Page 4
Truth tables Table 3. Truth table (driver) Inputs Note Don’t care High impedance Table 4. Truth table (receiver) Inputs ...
Page 5
Maximum ratings Table 5. Absolute maximum ratings Symbol V Supply voltage CC V Control input voltage (RE, DE Driver input voltage (DI Driver output voltage ( Receiver input voltage ( ...
Page 6
Electrical characteristics Table 6. ESD performance: transmitter outputs, receiver inputs Symbol Parameter ESD ESD protection voltage ESD ESD protection voltage Table 7. DC electrical characteristics (V specified. Typical values are referred to T Symbol Parameter Differential driver output (no ...
Page 7
Table 7. DC electrical characteristics (continued) (V otherwise specified. Typical values are referred to T Symbol Parameter Driver short-circuit current, I OSD2 V =Low O I Receiver short-circuit current V OSR 1. All currents into device pins are positive; all ...
Page 8
Table 9. Receiver switching characteristics (V specified. Typical values are referred to T Symbol Parameter t Propagation delay input to PLH t output PHL t Differential receiver skew SKD t Output enable time PZH t Output enable time PZL t ...
Page 9
Test circuit and typical characteristics Figure 2. Driver DC test load Figure 4. Drive/receiver timing test circuit Figure 3. Receiver timing test load Figure 5. Driver timing test load 9/18 ...
Page 10
Figure 6. Driver propagation delay Figure 7. Driver enable and disable time 10/18 ...
Page 11
Figure 8. Receiver propagation delay Figure 9. Receiver enable and disable time 11/18 ...
Page 12
Figure 10. Receiver output current vs output low voltage Figure 12. Driver output current vs output low voltage Figure 14. Supply current vs temperature 12/18 Figure 11. Receiver output current vs output high voltage Figure 13. Driver output current vs ...
Page 13
Figure 16. Receiver low level output voltage vs temperature Figure 17. Differential driver output voltage vs temperature 13/18 ...
Page 14
Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner ...
Page 15
SO-8 mechanical data mm. Dim. Min. Typ. A 1.35 A1 0.10 A2 1.10 B 0.33 C 0.19 D 4.80 E 3.80 e 1.27 H 5.80 h 0.25 L 0.40 k ddd inch. Max. Min. Typ. 1.75 0.053 0.25 0.04 1.65 ...
Page 16
Tape & reel SO-8 mechanical data Dim. Min 12 8.1 Bo 5.5 Ko 2.1 Po 3.9 P 7.9 16/18 mm. Typ. Max. Min. 330 13.2 0.504 0.795 2.362 22.4 8.5 0.319 5.9 ...
Page 17
Revision history Table 10. Document revision history Date Revision 21-Mar-2006 9 05-Jun-2006 10 29-Jan-2007 11 29-Aug-2007 12 07-Feb-2008 13 Changes Order codes has been updated and new template. Change value row 10 on the features and R Typo mistake ...
Page 18
... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...