AM7943-2PC AMD (ADVANCED MICRO DEVICES), AM7943-2PC Datasheet
AM7943-2PC
Specifications of AM7943-2PC
Related parts for AM7943-2PC
AM7943-2PC Summary of contents
Page 1
... FINAL Am7943 Subscriber Line Interface Circuit DISTINCTIVE CHARACTERISTICS Programmable constant-current feed Current gain = 200 Programmable loop-detect threshold Low power Standby state Performs polarity reversal Ground-key detector Tip Open state for ground-start lines BLOCK DIAGRAM TMG A(TIP) HPA Two-Wire Interface HPB B(RING) ...
Page 2
... Valid Combinations list configurations planned supported in volume for this device. Consult the local AMD sales office to confirm availability of JC specific valid combinations, to check on newly released combinations, and to obtain additional PC data on AMD’s standard military grade products. Am7943 Data Sheet Valid Combinations ...
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... Pin 1 is marked for orientation thermal conduction pin tied to substrate Connect 32-Pin PLCC 22-Pin Plastic DIP or 22-Pin Ceramic DIP HPA 22 HPB VTX RD VEE RSN DB AGND/DGND A(TIP RDC BGND 7 16 CAS C1 VCC DET TMG VBAT C3 SLIC Products HPB NC HPA VTX VEE RSN 3 ...
Page 4
... Transmit Audio. This output is a unity gain version of the A(TIP) and B(RING) metallic voltage. VTX also sources the two-wire input impedance programming network Description pull-up resistor. RDC Open-collector driver with emitter internally connected to Am7943 Data Sheet is negative for normal polarity and BGND. ...
Page 5
... C. The device should never be exposed to this temperature. Operation above 145 C junction temperature may degrade device reliability. See the SLIC Packaging Considerations for more information. Stresses above those listed under Absolute Maximum Ratings may cause permanent device failure. Functionality at or above these limits is not implied ...
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... V L – 1* – + – – + – 2 – 1* – + – – + – 900 LAC +70 C – +85 C – 55 dBm +70 C – +85 C Am7943 Data Sheet Min Typ Max Unit Note 3 –35 +35 — mV –40 + –2.5 +2.5 Vpk 2a 0.95 Vrms BAT 52 — 63 — — ...
Page 7
... L = 600 , BAT = – BAT to – 7 GND = 100 = Open = 1700 = 300 , R = TMG = 300 , R = TMG = 300 , R = TMG = 600 , SLIC Products Min Typ Max Unit Note –64 –50 dB –55 –40 +7 +10 — dBrnC +7 +12 4 –83 –80 — dBmp –78 4 25.0 27.0 29.0 20.0 23 ...
Page 8
... Off leakage V OH Zener breakover 100 A Zener on voltage Test Conditions (See Note mVrms), Active Normal State 375 = -------- - 0 –0 Am7943 Data Sheet Min Typ Max Unit Note 1.7 2.5 4.9 7.5 2.2 3.0 6.3 8.5 0.7 2.0 2.0 3.5 mA 0.77 2 ...
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... R connected (See Figure G) – – – –40 to +85 C Switchhook Detect state R = 600 , R open (See Figure F) – –40 to +85 C SLIC Products Min Typ Max Unit Note 3.8 4.0 1.1 1.6 1.1 1.6 3.8 4 1.2 1.7 3.8 4.0 1.1 1.6 3.8 4.0 ...
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... SWITCHING WAVEFORMS E1 to DET E1 DET tgkde E0 to DET E1 E0 DET tshdd Note: All delays measured at 1.4 V level tshde tgkde tshd0 Am7943 Data Sheet tshde tgkdd tgkd0 ...
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... This specification assumes the two-wire AC load impedance TX RX and an R VTX 150 pF VTX 150 pF network such as that shown in Note 7 above. The network reduces T Table 1. SLIC Decoding Two-wire Status Open Circuit Ring trip 1 Ringing Ring trip 0 Active Loop detector 1 On-hook TX (OHT) Loop detector ...
Page 12
... Power dissipated in the SLIC while in the Polarity Reverse state Total die temperature Thermal impedance of the 22-pin plastic dip package Thermal impedance of the 22-pin ceramic dip package Thermal impedance of the 32-pin plastic leaded chip carrier package Am7943 Data Sheet to RSN defined above and form the network connected to the RDC pin. ...
Page 13
... OHT state, 2. Anti-sat (battery tracking) turn-on: 3. Open circuit voltage: 4. Anti-sat (battery tracking) region 500 I = --------- - 500 -- - --------- - 1.017 V – 10.7 AB BAT V = 1.017 V – 6.3 AB BAT R DC --------- - V = 1.017 V – 6.3 – BAT L 120 – Voltage vs. Loop Current (Typical SLIC Products 2 Active state OHT state 13 ...
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... DC FEED CHARACTERISTICS (continued 18.52 k DC1 DC2 47.3 V BAT Loop Current vs. Load Resistance (Typical) A RSN SLIC B RDC Feed current programmed by R and R DC1 c. Feed Programming Figure 1. DC Feed Characteristics Am7943 Data Sheet R DC1 DC2 DC2 ...
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... L4-2 ) BRS = 20 log (V B. Four- to Two-Wire Insertion Loss and Balance Return Signal Note the desired impedance (e.g., the characteristic D impedance of the line –20 log ( Two-Wire Return Loss Test Circuit SLIC Products A(TIP) VTX SLIC R AGND RSN B(RING –20 log ( (TIP) VTX ...
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... TEST CIRCUITS (continued) HF GEN 50 1.5 Vrms 80% Amplitude Modulated 100 kHz to 30 MHz A(TIP 600 L B(RING) F. Loop-Detector Switching 200 200 RFI Test Circuit V CC 6.2 k DET Am7943 Data Sheet A(TIP) CAX B(RING) CBX VTX 33 nF SLIC under test A(TIP) B(RING) RG – BAT G. Ground-Key Switching ...
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... Product names used in this publication are for identification purposes only and may be trademarks of their respective companies VEE DA VCC VTX A(TIP) HPA RSN HPB B(RING) R DC1 RDC RINGOUT AGND/ DGND BGND VBAT DET TMG CAS C CAS H. Am7943 Test Circuit SLIC Products +5 V – DC2 C DC BATTERY GROUND ANALOG GROUND DIGITAL GROUND 17 ...