NM95HS02N – Complete Model Information
(Fairchild HiSeC™ Rolling-Code Generator, Crystal-Clock, PDIP-8, Industrial Temp)

1. Device FamilyNM95HS – High-Security Rolling-Code Generator for RKE / Alarm / Access-Control
2. Ordering Code BreakdownNM95HS 02 N│ │ ││ │ └──── Package: 8-pin 300-mil plastic DIP (N)│ └────── Clock Source: Crystal oscillator (02)└──────── HiSeC security generator family
3. Key Features• 2⁴⁸ (2.8×10¹⁴) rolling-code combinations• Crystal oscillator drive (CKI / CKO) 0.25 – 4.1 MHz• 2.2 V – 6.5 V single-supply• < 1 µA standby (Halt-Mode) current• 13-byte on-chip EEPROM for user configuration• 2 switch inputs (KEY1 / KEY2) with on-chip debounce• IR or RF bit-coding formats (11 RF + 4 IR)• TX, RFEN/LED & CKO/LED outputs (15 mA sink)• Full resync & forward-calculation window support• Industrial temp grade –40 °C … +85 °C
4. Electrical Ratings (TA = –40 … +85 °C, VCC = 2.2 … 6.5 V)Supply current: 0.1 µA typ halt, 3 mA @ 4 MHz activeVIH: 0.7 VCC min VIL: 0.2 VCC maxIOH/IOL: ±10 mA / 15 mA @ VCC = 4.5 VESD: 2 kV HBM
5. Pin-out (8-pin PDIP – top view)1 KEY1 2 KEY2 3 GND 4 CKI5 CKO/LED 6 RFEN/LED 7 TX 8 VCC
6. Typical Application Circuit• 4 MHz crystal between CKI-CKO + 22 pF load caps• 470 kΩ pull-up on KEY pins, switches to GND• LED (2 mA) from VCC to RFEN/LED• TX drives either IR LED (10 mA) or 433 MHz SAW oscillator stage
7. Memory Map (13-byte EEPROM)Byte 0: AutoResync, LEDSEL, BatteryType, TIMEOUTEN, write-lockByte 1: Preamble, Sync, Key-ID size, Parity, Low-battery enableByte 2: IR/RF format, TX polarity, SCLK, Prescaler-1Bytes 3-4: Prescaler-2/3 (IR & RF bit timing)Bytes 5-7: 24-bit dynamic-code seedBytes 8-10: 24-bit Key-IDByte 11: 8-bit sync-field patternByte 12: Factory custom-algorithm lock (read-only after write-disable)
8. Data-Frame Format (user configurable)Preamble (0/11 bit) → Sync (0/8 bit) → Key-ID (0/20/24 bit) → Data (4 bit) → Dynamic code (24/36 bit) → Parity (0/8 bit) → Stop (1 bit)Frame length: 29 – 96 bitsInter-frame pause: 0 / 20 / 50 / 100 msTimeout (optional): 80 s continuous press → Halt
9. Security & Synchronization• Non-linear feedback shift-register encryption• Forward-calculation window ≥ 256 codes (decoder side)• Sync-frame transmission for initial pairing & resync• Optional disable of resync for highest security
10. Package & Shipping Details• 8-pin PDIP, 0.300″ row spacing, JEDEC MS-001 (N08E)• Tube qty: 50 pcs / tube, 20 tubes / box (1 k pcs)• MSL 1, unlimited floor life, Pb-free matte-tin leads• UL 94 V-0 flammability
11. Ordering Variants (same die, different temp / pkg)NM95HS02M8 –40 … +85 °C, SO-8NM95HS02EN –40 … +85 °C, PDIP-8 (same as NM95HS02N)NM95HS02M14 – 4-key version, SO-14NM95HS02MT14 – 4-key version, TSSOP-14
12. Design Support• Datasheet: NM95HS01-02.pdf (Fairchild, July 1998)• App-Note AN-985 “Designing a Complete HiSeC RKE System”• Spice/IBIS models & EEPROM programming kit on request
13. Legal / Compliance• Not qualified for life-support or safety-critical use without written approval• RoHS-compliant, REACH & Pb-free certified