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UM3491 Datasheet(PDF) 11 Page - Union Semiconductor, Inc. |
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UM3491 Datasheet(HTML) 11 Page - Union Semiconductor, Inc. |
11 / 17 page ________________________________________________________________________ http://www.union-ic.com Rev.04 Feb.2015 11/17 UM3488/UM3491 Test Circuit Figure 3. Driver DC Test Load Figure 4. Receiver Enable/Disable Timing Test Load Figure 5. Driver Timing Test Circuit Figure 6. Driver Enable and Disable Timing Test Load Figure 7. Driver Propagation Delays Figure 8. Driver Enable and Disable Times Figure 9. Receiver Propagation Delays Figure 10. Receiver Enable and Disable Times Figure 11. Receiver Propagation Delay Test Circuit Figure 12: Line Repeater Y Z R R VOD VOC 1K 1K VCC S1 S2 + CRL 15pF Test Point Receive Output Z Y DI DE 3V VOD2 CL1 CL2 RDIFF + CL S1 S2 VCC Output Under Test 500ohm DI 0V 3.3V 1.5V Z Y VO 1/2VO tDPHL 1/2VO 1.5V tDPLH VDIFF 0 VO -VO 10% 90% 10% 90% tDR tDF VDIFF=V(Y)-V(Z) tSKEW=tDPLH-tDPHL 1.5V 1.5V DE 0V 3.3V Y,Z Y,Z 0 VOL VOL+0.5V VOH-0.5V 2.3V 2.3V Output Normally Low Output Normally High tDZL(SHDN), tDZL tDZH(SHDN), tDZH tDHZ tDLZ 1.5V 1.5V INPUT A B 1V -1V VOH VOL RO OUTPUT tRPLH tRPHL 1.5V 1.5V RE 0V 3.3V RO 0 VCC VOL+0.5V VOH-0.5V 1.5V 1.5V Output Normally Low Output Normally High tRZL(SHDN), tRZL tRZH(SHDN), tRZH tRHZ tRLZ ATE VD R B A Receiver Output 120ohm DI RO R D Y Z B A 120ohm DATA IN DATA OUT RE DE |
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