am7945 Advanced Micro Devices, am7945 Datasheet
am7945
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am7945 Summary of contents
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... Am7945 Subscriber Line Interface Circuit DISTINCTIVE CHARACTERISTICS Programmable constant-current feed Current gain = 200 Programmable loop-detect threshold Low power Standby state Ground-key detector Tip Open state for ground-start lines – –56.5 V battery operation BLOCK DIAGRAM TMG A(TIP) HPA Two-Wire Interface HPB ...
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... Valid Combinations Valid Combinations list configurations planned to be supported in volume for this device. Consult JC the local AMD sales office to confirm availability of specific valid combinations and to check on newly released combinations, and to obtain additional data on AMD’s standard military grade products. Am7945 Data Sheet ...
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CONNECTION DIAGRAM Top View TP RINGOUT NC TMG VBAT DET Notes: 1. Pin 1 is marked for orientation thermal conduction pin tied to substrate Connect 32-Pin PLCC 4 3 ...
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... V power supply VEE Power –5 V power supply VTX Output 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. 4 Description pull-up resistor. Am7945 Data Sheet is negative RDC ...
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ABSOLUTE MAXIMUM RATINGS Storage temperature . . . . . . . . . . . . –55°C to +150°C With respect to AGND/DGND ...
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... ELECTRICAL CHARACTERISTICS The Am7945 device is tested under the following conditions unless otherwise noted: BAT = – – 900 . The device is not tested in Polarity Reversal state Description Analog output (V ) impedance TX Analog output (V ) offset TX Analog (RSN) input impedance Longitudinal impedance ...
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ELECTRICAL CHARACTERISTICS (continued) Description Idle Channel Noise (2-Wire and 4-Wire) C-message weighted Psophometric weighted Line Characteristics, Active State (See Figure 1) Short loops, Active state Long loops, Active state OHT state Standby state Loop current I LIM ( ...
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... Hz to 3.4 kHz 3.4 kHz CAS pin to GND 100 kHz to 30 MHz (See Figure E) 375 -------- - I = DET R D B(RING) to GND B(RING) to GND Source resistance = 2 M All inputs except C3 and E1 Input C3 Input 0.8 mA OUT I = –0.1 mA OUT Am7945 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 2.0 2.1 5.0 ...
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ELECTRICAL CHARACTERISTICS (continued) Description Relay Driver Output (RINGOUT) On voltage Off leakage Zener breakover Zener On voltage RELAY DRIVER SCHEMATIC SWITCHING CHARACTERISTICS (32-Pin PLCC only) Symbol Parameter E1 Low to DET High ( tgkde E1 Low to DET ...
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... V . This specification assumes the two-wire AC load impedance TX RX and specified for system design only. (600 : RSN VTX network such as that shown in Note 7 above. The network reduces T Am7945 Data Sheet tshde tgkd0 = 0.33 F, DC1 DC2 DC = 1700 . TMG of 600 in production. Performance at ...
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State Note: E0 High enables DET. Table 2. User-Programmable Components Z = 200 ...
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... Open circuit voltage: 4. Anti-sat (battery tracking) region 500 --------- - 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 Am7945 Data Sheet 2 Active state OHT state ...
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DC FEED CHARACTERISTICS (continued 1000 DC1 DC2 –47.3 V BAT b. Loop Current vs. Load Resistance (Typical 2000 ...
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... R RX RSN V RX Note the desired impedance (e.g., the characteristic L D impedance of the line –20 log ( Two-Wire Return Loss Test Circuit Am7945 Data Sheet A(TIP) VTX SLIC R T AGND R RX RSN B(RING log ( L4 ...
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TEST CIRCUITS (continued) HF GEN 50 1.5 Vrms 80% Amplitude Modulated 100 kHz to 30 MHz V CC A(TIP 600 L B(RING) F. Loop-Detector Switching 200 200 RFI Test ...
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... VEE DB RD VTX A(TIP) HPA RSN HPB B(RING) RDC RINGOUT AGND/ DGND BGND VBAT DET TMG CAS TMG H. Am7945 Test Circuit Am7945 Data Sheet +5 V – DC2 R DC1 C DC BATTERY GROUND ANALOG GROUND DIGITAL ...
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PHYSICAL DIMENSION PL032 .485 .495 .447 .453 .585 Pin 1 I.D. .595 .547 .553 .026 .032 TOP VIEW REVISION SUMMARY Revision • Minor changes were made to the data sheet style and format to conform to AMD ...
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... The contents of this document are provided in connection with Advanced Micro Devices, Inc. ("AMD") products. AMD makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication and reserves the right to make changes to speci- fications and product descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any in- tellectual property rights is granted by this publication. Except as set forth in AMD’ ...