B737-300 CREW HAD AN A320 CREW HAD LESS THAN LEGAL SEPARATION IN PHX CLASS B. THE A320'S RESTR BANK ANGLE WAS NOT ANTICIPATED BY THE DEP CTLR.

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DEPARTED PHX RWY 25R ASSIGNED THE TFD 1 DEP #2 IN-TRAIL OF COMPANY AIRBUS WITH SAME CLRNC. WE WERE APPROX 1 TO 1.5 MI IN-TRAIL. CHKED ON WITH DEP CTL WAS GIVEN FL210 AND MAINTAIN VISUAL FROM COMPANY A320. WHEN THE A320 REACHED THE 9 DME FIX ON THE TFD 1; HE WAS GIVEN HEADING 120 DEGS. A320 RESPONDED YET DID NOT TURN. WHEN WE REACHED THE 9 DME FIX WE WERE ALSO GIVEN A 120 DEG HDG. THE A320 BEGAN ITS TURN WHEN WE DID; PLACING BOTH ACFT ON PARALLEL COURSES. DUE TO THE BANK ANGLE OF OUR TURN I LOST THE A320 BUT THE FO SAID HE HAD VISUAL WHILE IN OUR TURN. THE A320 WAS GIVEN A 090 DEG HDG PLACING HIM NOW ON CONVERGING COURSE. THE FO COMMENTED THAT THIS DID NOT LOOK LIKE IT WAS GOING TO WORK. WHEN WE ROLLED OUT ON OUR 120 DEG HDG; IT WAS OBVIOUS THAT SEPARATION WITH THE A320 WOULD BE COMPROMISED. JUST THEN THE FO COMMANDED 'HARD L!' WHILE THE TCASII SIMULTANEOUSLY COMMANDED 'DSND; DSND NOW.' I DID BOTH. IN THE BANKING DSCNT TCASII COMMANDED; 'INCREASE DSCNT.' I DID. WHEN CLR OF CONFLICT CAME; WE LOST APPROX 2000 FT AND RESUMED OUR FLT AFTER NOTIFYING ATC. CONTRIBUTING FACTORS: CTLR RELIANT UPON ACFT PROVIDING OWN SEPARATION. A320 DELAYED TURN. CTLR ASSIGNING A 090 DEG HDG TO A320 PROBABLY NOT REALIZING WE WERE NO LONGER IN-TRAIL BUT PARALLEL. FREQ CONGESTION. TCASII COMMANDING BOTH ACFT TO DSND. IT APPEARS THAT TCASII DID NOT COMMUNICATE WITH ONE ANOTHER. INSTEAD OF COMPLEMENTARY RA'S IT GAVE CONFLICTING. SUPPLEMENTAL INFO FROM ACN 594177: MAXXO ONE DEP FROM RWY 25R. FROM A HEADING OF 240 DEGS AND PRIOR TO 9 DME OF PXR; ATC ISSUED A HEADING OF 120 DEGS FOLLOWED BY INSTRUCTIONS FOR A FURTHER L TURN TO 090 DEGS. SHORTLY THEREAFTER; FLT WAS CLRED DIRECT BAYTA INTXN -- CLRNC ALT FL210. AUTOPLT AND AUTOTHRUST ENGAGED; TCASII ISSUED AN RA TO DSND. A TARGET IN THE L REAR QUADRANT AND 600 FT ABOVE WAS INDICATED. AUTOPLT WAS DISENGAGED AND A DSCNT INITIATED TO COMPLY WITH THE RA. EVASIVE ACTION TERMINATED WHEN CLRED OF CONFLICT. NO INJURIES RPTED; NOR WAS AN EMER DECLARED. FLT PROCEEDED AS PLANNED. SUPPLEMENTAL INFO FROM ACN 594172: WE DEPARTED RWY 25R ON MAXXO DEP. AT ABOUT 3000 FT AGL ON 240 DEG HDG WE WERE GIVEN CLB TO FL210. SHORTLY AFTER CLRNC TO FL210; WE WERE GIVEN L TURN TO 120 DEG HDG. THIS WAS FOLLOWED SHORTLY THEREAFTER WITH A CLRNC TO A 090 DEG HDG. WE WERE THEN CLRED DIRECT BAYTA WHICH REQUIRED ABOUT A FURTHER L TURN OF 10 DEGS. AUTOPLT; AUTOTHRUST WERE FUNCTIONING. TCASII ALERTED TFC AT ABOUT 7:30 O'CLOCK POS; 600 FT ABOVE AND CLBING. CAPT ACQUIRED TFC; TOOK CTLS TO AVOID; FOLLOWED ALMOST IMMEDIATELY BY A TCASII DSND RA. WE DSNDED TO 6500 FT DURING MANEUVER. NO DAMAGE OR INJURY WAS SUFFERED. OTHER ACFT TOOK OFF BEHIND US; WAS INSTRUCTED TO MAINTAIN VISUAL SEPARATION AND WAS VECTORED INSIDE OF OUR TURN PRIOR TO OUR CLRNC TO 090 DEG HDG. I DID NOT HAVE SITUATIONAL AWARENESS OF THIS TFC; AND OUR TCASII WAS SET TO INTRUDER ONLY.