U4087B TEMIC | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 8

Technical content

Features

Low voltage operation: 3.0 to 7.0 V Four point signal sensing Monitoring system for background noise level Case: SO 16 Chip Disable for active/standby operation Benefits Fast channel switching allows quasi duplex operation Low current consumption Block Diagram Bias Noise detector TS Logic Logic C.T. Generator Charge DIRA Discharge Logic DIRE Logic Logic CT 12610 TLO2 CPT VB VM CD GND TLO1 TLI1 RLI1 TLDR TLDT RLO1 RLO2 RLI2 TLI2 Figure 1. Block diagram with external circuit

Figure 2. Application for hands-free operation

Figure 3. Application for handsfree operation

Rev. A1, 09-Sep-96 Preliminary Information 4 (8) Typical Value of External Components 100 nF 4.7 nF 10 F 220 F 47 F 470 F 820 nF 100 F 100 nF C10 150 nF C11 68 nF C12 33 nF C13 10 F C14 100 nF C15 1 F C16 47 F C17 10 F C18 10 F C19 68 nF C20 68 nF C21 1 F C22 100 nF C23 6.8 nF C24 10 nF C25 100 nF 2.2 mH 27 k 20 k > 68 k 1.5 k 62 k 680 k 22 k 330 R10 3 k R11 62 k R12 30 k R13 62 k R14 120 k R15 47 k R16 1 k R17 1.2 R18 30 k R19 6.8 k R20 6.8 k R21 15 k R22 330 k R23 220 k R24 68 k R25 2 k R26 3.3 k R27 18 k R28 2 k R29 R31 56 k

Rev. A1, 09-Sep-96 5 (8) Pin Description Pin Symbol Function TLI1 Transmit level detector input on the line side TLO1 Transmit level detector output on the line side RLO1 Receive level detector output on the line side RLI1 Receive level detector input on the line side GND Ground CD Chip Disable A logic low (< 0.8 V) sets normal operation. A logic high (> 2.0 V) disables the IC to con- serve power. Input impedance is nominally 90 k. VB Supply voltage 2.8 to 7.0 V, approx. @ 1 mA RLO2 Receive level detector output on the microphone/speaker side RLI2 Receive level detector input on the microphone/speaker side TLDR Positive control output for U4090B TLDT Negative control output for U4090B CT Response time An RC at this pin sets the response time for the circuit to switch modes VM It is a system ac ground, supplied by U4090B, VM VB/2 CPT An RC at this pin sets the time constant for the transmit background monitor TLI2 Transmit level detector input on the microphone/speaker side TLO2 Transmit level detector output on the microphone/speaker side, and input to the transmit background monitor Absolute Maximum Ratings Reference point Pin 1, Tamb = 25°C, unless otherwise specified Parameters Symbol Value Unit Supply voltage Pin 7 VB – 0.3 to + 12 V Voltages: Pin 6 Pin 13 – 0.3 to 6 V Storage temperature range Tstg – 55 to + 150 Junction temperature Tj 125 Ambient temperature range Tamb – 20 to + 60 Power dissipation Tamb = 60 °C SO 16 Ptot 750 mW Maximum thermal resistance Junction ambient SO 16 RthJA 110 K/W Operation Recommendation Parameters Test conditions / Pin Symbol Min. Typ. Max. Unit Supply voltage Pin 7 VB 3.0 7.0 V CD input Pin 6 VB V Ambient temperature range Tamb – 20 + 60

Rev. A1, 09-Sep-96 Preliminary Information 6 (8)

Electrical Characteristics

Tamb = + 25°C, VS = 5.0 V, CD 0.8 V, unless otherwise specified Parameters Test conditions / Pin Symbol Min. Typ. Max. Unit Power supply Supply current VB = 6.5 V, CD = 0.8 V VB = 6.5 V, CD = 2.0 V IB 1.0 60.0 2.0 150.0 mA A CD input resistance VB = VCD = 6.5 V RCD 50.0 90.0 k CD input voltage – High – Low VCDH VCDL 2.0 0.0 VB 0.8 V Attenuator control CT voltage Pin 12 – VM R mode Idle mode T mode VCT + 240.0 0.0 – 240.0 mV CT source current R mode ICTR – 85.0 – 60.0 – 40.0 A CT sink current T mode ICTT + 40.0 + 60.0 + 85.0 A CT idle current ICTS 0.0 A Level detectors and background noise monitor Source current at RLO1, RLO2, TLO1, TLO2 ILSO – 2.0 mA Sink current at RLO1, RLO2, TLO1, TLO2 ILSK 4.0 A CPT output resistance IO = 1.0 mA RCP 100 CPT leakage current ICPLK – 0.2 A

Ordering Information

Rev. A1, 09-Sep-96 7 (8) Dimensions in mm 94 8875

Rev. A1, 09-Sep-96 Preliminary Information 8 (8) Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances (ODSs). The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423