Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
AM7945JC Datasheet(PDF) 4 Page - Advanced Micro Devices |
|
AM7945JC Datasheet(HTML) 4 Page - Advanced Micro Devices |
4 / 18 page 4 Am7945 Data Sheet PIN DESCRIPTIONS Pin Names Type Description AGND/DGND Gnd Analog and digital ground A(TIP) Output Output of A(TIP) power amplifier BGND Gnd Battery (power) ground B(RING) Output Output of B(RING) power amplifier C3–C1 Input Decoder. TTL compatible. C3 is MSB and C1 is LSB. CAS Capacitor Anti-saturation pin for capacitor to filter reference voltage when operating in anti-saturation region. DA Input Ring-Trip Negative. Negative input to ring-trip comparator. DB Input Ring-Trip Positive. Positive input to ring-trip comparator. DET Output Switchhook Detector. When enabled, a logic Low indicates the selected detector is tripped. The detect condition is selected by the logic inputs (C3–C1, E0, E1). The output is open- collector with a built-in 15 k Ω pull-up resistor. E0 Input Ground-Key Enable. A logic High enables DET. A logic Low disables DET (PLCC only). E1 Input Ground-Key Enable. E1 = Low connects the ground-key or ring-trip detector to DET. E1 = High connects the off-hook or ring-trip detector to DET (PLCC only). HPA Capacitor High-Pass Filter Capacitor. A(TIP) side of high-pass filter capacitor. HPB Capacitor High-Pass Filter Capacitor. B(RING) side of high-pass filter capacitor. RD Resistor Detect Resistor. Threshold modification and filter point for the off-hook detector. RDC Resistor DC Feed Resistor. Connection point for the DC feed current programming network. The other end of the network connects to the receiver summing node (RSN). VRDC is negative for normal polarity and positive for reverse polarity. RINGOUT Output Ring Relay Driver. Open-collector driver with emitter internally connected to BGND. RSN Input Receive Summing Node. The metallic current (both AC and DC) between A(TIP) and B(RING) is equal to 200 times the current into this pin. Networks that program receive gain, two-wire impedance, and feed resistance all connect to this node. TMG — Thermal Management. Connect an external resistor between this pin and the VBAT pin to reduce on-chip power dissipation in the normal polarity, Active state only. See Table 2. TP Thermal Thermal pin. Connection for heat dissipation. Internally connected to substrate (QBAT). Leave as open circuit or connected to QBAT. In both cases, the TP pins can connect to an area of copper on the board to enhance heat dissipation. VBAT Battery Battery supply VCC Power +5 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. |
Número de pieza similar - AM7945JC |
|
Descripción similar - AM7945JC |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |