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PART III. TYPES OF NAMS NAM Types Used in Cellular Phones NAM- Number Assignment Module - A 32 word by 8 bit PROM The NAM contains all the information that can be programmed to the phone directly from the handset. (i.e. SIDH,MIN,LOCK-CODE,etc.). All phones except NEC will accept tri-state NAMs. NEC requires an open collector NAM. Fujitsu phones will accept either open collector or tri- state NAMs. Brand Qualifications: Fujitsu and Alpine phones will not operate properly with any Harris Brand NAM or with any Signetics brand NAMs with a part number NOT ending with an "A". TI NAMs must not be used in GE Star models. Panasonic has suggested only TI NAMs should be used in their phones. NAMs are available in ceramic (F) or plastic encapsulation (N). BRAND OPEN COL. TRI-STATE OPEN COL. TRI-STATE ============================================================================= Signetics 82S23 82S123 Texas Inst. 74S188 74S288 TBP18SA030 TBP18S030 AMD AM27LS18 AM27LS19 AM27S18 AM27S19 Texas Inst. TBP38SA030 TBP38S030 Harris HM7602 HM7603 MMI 53/6330 53/6331 MMI 53/63S080 53/63S081 NSC DM54S188 DM54S288 DM74S188 NSC DM82S23 DM82S123 Motorola This is for a special NAM used in some Motorolas. Requires an adapter. Fujitsu MB7056 MB7051 *****************************************************************************