CMX602B Consumer Microcircuits Limited, CMX602B Datasheet
CMX602B
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CMX602B Summary of contents
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... Brief Description The CMX602B is a low power CMOS integrated circuit for the reception of the physical layer signals used in BT's Calling Line Identification Service (CLIP), Bellcore's Calling Identity Delivery System (CID), the Cable Communications Association's Caller Display Services (CDS), and similar evolving systems. It also meets the requirements of emerging Caller Identity with Call Waiting services (CIDCW) ...
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... FSK Demodulator....................................................................... 9 1.5.6 FSK Data Retiming..................................................................... 9 1.5.7 Tone Alert Detector.................................................................. 10 1.5.8 Ring or Line Polarity Reversal Detector ................................ 11 1.5.9 Xtal Osc and Clock Dividers ................................................... 13 1.6 Application Notes 1.6.1 'On-Hook' Operation ................................................................ 14 1.6.2 'Off-Hook' Operation ................................................................ 17 1.7 Performance Specification 1.7.1 Electrical Performance ............................................................ 19 1.7.2 Packaging ................................................................................. 23 2003 CML Microsystems Plc CONTENTS ............................................................................... 1 .................................................................................... 3 ............................................................................................ 4 ..................................................................... 6 ......................................................................... 7 ........................................................................... 14 ......................................................... 19 2 CMX602B Page D/602B/2 ...
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... Calling Line Identifier 1.2 Block Diagram 2003 CML Microsystems Plc Figure 1 Block Diagram 3 CMX602B D/602B/2 ...
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... A high level on this input selects 'Zero-Power' mode, a low level enables the V Input Signal Amplifier, the Bandpass Filter and either the FSK or the Tone Alert circuits depending on the MODE input. 4 Description and a DD should be connected capacitor SS supply, the BIAS CMX602B /2 D/602B/2 ...
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... FSK Demodulator or re-timed 8-bit characters depending on the state of the RXCK input. See section 1.5.6 Power The positive supply rail. Levels and thresholds within the device are proportional to this voltage. Should be decoupled capacitor mounted close to the device pins. 5 CMX602B Description D/602B/2 ...
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... R11 100k Resistors 1%, capacitors 20% unless otherwise stated. Figure 2 Recommended External Components for Typical Application It is recommended that the printed circuit board is laid out with a ground plane in the CMX602B area to provide a low impedance ground connection to the V 2003 CML Microsystems Plc for ...
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... Calling Line Identifier 1.5 General Description 1.5.1 Mode Control Logic The CMX602B's operating mode and the source of the DET and IRQN outputs are determined by the logic levels applied to the MODE and ZP input pins: ZP MODE 0 0 Tone Alert Detect 0 1 FSK Receive 1 0 'Zero-Power' ...
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... Calling Line Identifier The CMX602B has been designed to meet the applicable specifications with R8 = 430k nominal, rising to 680k shown in section 1.4 and Fig 3c. The Input Signal Amplifier may also be used with an unbalanced signal source as shown in Figure 3b. The values of R6 and R8 are as for the balanced input case. ...
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... The high to low transition at the end of the first 7 of these pulses will be used by the CMX602B to shift the next data bit from the shift register onto the RXD output. At the end of the eighth pulse the FSK Demodulator output will be reconnected to the RXD output pin. The IRQN output will be cleared the first time the RXCK input goes high ...
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... CAS qualifying time TqCAS limits (see 1.7.1) , then the IRQN output will be pulled low and will remain low until the CMX602B is switched out of Tone Alert Detect mode. Note that the TqCAS timing has been optimised for the detection 85ms Tone Alert (CAS) signals used in off-hook ...
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... These circuits are used to detect the Line Polarity Reversal and Ringing signals associated with the Calling Line Identification protocol. Figure 7 illustrates their use in a typical application. Figure 7 : Ring or Line Polarity Reversal operation 2003 CML Microsystems Plc See section 1.7.1 for definitions of Tton, Ttoff and TqCAS Figure 6 : Tone Alert Detector operation 11 CMX602B D/602B/2 ...
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... The signal at point X will be further attenuated by the potential divider formed by R1 and R2 before being applied to the CMX602B input the amplitude of the signal appearing greater than the input threshold (Vthi) of Schmitt trigger 'A' then the N transistor connected to RT will be turned on, pulling the voltage discharging the external capacitor C5 ...
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... If the clock is provided by an external source which is not always running, then the ZP input must be set high when the clock is not available. Failure to observe this rule may cause a significant rise in the supply current drawn by CMX602B as well as generating undefined states of the RXD, DET and IRQN outputs. 2003 CML Microsystems Plc ...
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... British Telecom System Figure 8a illustrates the line signalling and CMX602B I/O signals for the BT on-hook Calling Line ID system as defined in BT specifications SIN227 and SIN242 part 1. A similar system is described in ETS 300 659-1 section 6.1.2c. ...
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... AC and DC line terminations during FSK reception are optional. Mercury Communications Ltd. specification MNR 19 allows for either the BT system or that specified by CCA. As these are all slight variants on the BT and Bellcore systems, they can also be handled by the CMX602B. 2003 CML Microsystems Plc 15 CMX602B D/602B/2 ...
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... Calling Line Identifier Figure 8c : Flow Chart for On-hook Operation of CMX602B 2003 CML Microsystems Plc 16 CMX602B D/602B/2 ...
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... Because the numbers of false responses (Talk-offs) and missed signals (Talk-downs) are related to the speech levels at the CMX602B input, and because the level of near end speech from the local handset is normally greater than that of far end speech coming from the Central Office, a further improvement in overall performance can be obtained by taking the CMX602B’ ...
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... The IRQN output going low when in Tone Alert Detect mode indicates that a CAS has been detected. The local handset and keypad should then be muted as required by the Bellcore specification and the CMX602B switched to FSK Receive mode to be ready to receive the FSK data, doing this will also clear the IRQN output. ...
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... Notes Min. Max. Units -0.3 7 -30 +30 mA -20 +20 mA Min. Max. Units 800 mW 13 mW/°C -55 +125 °C -40 +85 °C Min. Max. Units 300 mW 5 mW/°C -55 +125 °C -40 +85 °C Min. Max. Units 2.7 5.5 V -40 +85 °C 3.575965 3.583125 MHz < 3.0V. DD CMX602B D/602B/2 ...
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... Dual tone burst duration 2003 CML Microsystems Plc = 3.3V to 5.5V at Tamb = -40 to +85°C, DD 0.1% Notes Min. 1 70 0.56V 0.44V - 0.6V 0.5 8 -40.0 -6 ±75 ± CMX602B Typ. Max. Units 0.02 1.0 0.5 1.0 1.0 2.0 30% +1.0 0.4 1.0 0.56V 0.6V 0.44V DD DD 2130 2750 55.0 10.0 45.0 ±0.5 ±0.5 -2.2 +6.0 85 -46.0 45.0 D/602B/2 µ ...
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... Voltage gain XTAL Input 'High' pulse width 'Low' pulse width Notes not including any current drawn from the CMX602B pins by external circuitry other than X1, C1 and C2. 2. RD, MODE, RXCK inputs All conditions must be met to ensure detection. 4. For V = 3.3V with equal level tones and with the input signal amplifier external DD components as section 1 ...
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... Calling Line Identifier 4 3.5 3 2.5 Vin 2 1 Figure 10 : Schmitt Trigger typical input voltage thresholds vs 0.1 0.01 0.001 0.0001 -40 Figure 11 : Typical 'Zero Power' I 2003 CML Microsystems Plc Vthi Vtlo 3 -30 -20 - Temperature vs. Temperature ( 5 5.0V) DD CMX602B D/602B/2 ...
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... Calling Line Identifier 1.7.2 Packaging Figure 12 : 16-pin SOIC Mechanical Outline: Order as part no. CMX602BD4 Figure 13 : 16-pin DIL Mechanical Outline: Order as part no. CMX602BP3 2003 CML Microsystems Plc 23 CMX602B D/602B/2 ...
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... Calling Line Identifier Figure 14 : 16-pin TSSOP Mechanical Outline: Order as part no. CMX602BE4 Handling precautions: This product includes input protection, however, precautions should be taken to prevent device damage from electro-static discharge. CML does not assume any responsibility for the use of any circuitry described. No IPR or circuit patent licences are implied. CML reserves the right at any time without notice to change the said circuitry and this product specification ...
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