MT88E45BS1 Zarlink, MT88E45BS1 Datasheet
MT88E45BS1
Specifications of MT88E45BS1
Related parts for MT88E45BS1
MT88E45BS1 Summary of contents
Page 1
... This product is obsolete. This information is available for your convenience only. For more information on Zarlink’s obsolete products and replacement product lists, please visit http://products.zarlink.com/obsolete_products/ ...
Page 2
Features • Compatible with: • Bellcore GR-30-CORE, SR-TSV-002476, ANSI/TIA/EIA-716, draft TIA/EIA-777; • ETSI ETS 300 778-1 (FSK only variant) & -2; • BT (British Telecom) SIN227 & SIN242 • Bellcore ‘CPE Alerting Signal’ (CAS), ETSI ‘Dual Tone Alerting Signal’ (DT-AS), ...
Page 3
MT88E45 Pin Description Pin # Name 1 V Voltage Reference (Output). Nominally Vdd/ used to bias the Tip/Ring and Hybrid input op- REF amps. 2 IN1+ Tip/Ring Op-amp Non-inverting (Input). 3 IN1- Tip/Ring Op-amp Inverting (Input). 4 GS1 ...
Page 4
Advance Information Pin Description (continued) Pin # Name 10 DATA 3-wire FSK Interface Data (CMOS Output). Mark frequency corresponds to logical 1. Space frequency corresponds to logical 0. In mode 0 (when the CB0 pin is logic low) the FSK ...
Page 5
... Functional Overview The MT88E45 is compatible with FSK and FSK plus CAS (CPE Alerting Signal) based Caller ID services around the world. Caller ID is the generic name for a group of services offered by telephone operating companies whereby information about the calling party is delivered to the subscriber. In Europe and some other countries Caller ID is known as Calling Line Identity Presentation (CLIP) ...
Page 6
... CAS and then FSK. Bellcore calls an on-hook capable Caller ID CPE a ‘Type 1 CPE’. In off-hook Caller ID, such as CIDCW and CLIP with Call Waiting, information about a new calling party is sent to the subscriber who is already engaged in a call. Bellcore’s method uses CAS to alert the CPE. ...
Page 7
MT88E45 Being able to detect CAS on Tip/Ring also makes the MT88E45 suitable for BT on-hook CLIP applications. For applications such as those in most European countries where Tip/Ring CAS detection is not needed, then the Tip/Ring and Hybrid op-amp ...
Page 8
Advance Information 2130 Hz and 2750 Hz CAS/DT-AS Characteristics Frequency Tolerance Signal Level (per tone) Reject Level (per tone) Maximum Twist ( 2130Hz 2750Hz Duration Reject Duration Signal to Noise Ratio Hybrid Op-amp (GS2) Gain Vdd = 5V ...
Page 9
MT88E45 Both Tones Present CAS t DP EST t GP ST/GT STD Figure 5 - CAS Guard Time Circuit Operation dropouts once EST has met the minimum tone duration decrease the likelihood of a long talkoff being ...
Page 10
... The FSK characteristics are shown in Table 4. In North America, TIA (Telecommunications Industry Association) also defines standards. The Type 1 Caller ID CPE standard is ANSI/TIA/EIA-716. The Type 2 standard is being drafted to become TIA/EIA- 777. The North American FSK characteristics in Table 4 are from ANSI/TIA/EIA-716. They differ from those Bellcore published in SR-TSV-002476 and SR- 3004 ...
Page 11
MT88E45 CAS detection, the CAS level will also be reduced for on-hook detection. FSK Data Interface The MT88E45 provides a powerful dual mode 3-wire interface so that the data bytes in the demodulated FSK bit stream can be extracted without ...
Page 12
Advance Information A 10ms hysteresis is provided to allow for momentary signal dropout once CD has been activated released when there is no activity at the FSK bandpass filter output for 10ms. When CD is inactive (high), the ...
Page 13
MT88E45 Application Circuits TIP RING Microcontroller = From Microcontroller (FSK Interface Mode 1 selected) R15 is required only if both FSK interface mode 0 and power down features are used. Unless ...
Page 14
Advance Information 1.00 0.95 0.90 0.85 0.80 0.75 0.70 0.668 0.65 0.60 0.55 0.531 0.50 3.0 Figure 8 - Gain Ratio as a Function of Nominal Vdd Gain Setting Resistor Calculation Example for Figure 8: • For the desired nominal ...
Page 15
MT88E45 Interrupt Source 1 INT1 (Open Drain) Interrupt Source 2 INT2 (CMOS) MT88E45 DR/STD (CMOS) Figure 9 - Application Circuit: Multiple Interrupt Source 14 Vdd Vdd Resistor (R2) Resistor (R1 can be opened and D1 shorted if the ...
Page 16
Advance Information Absolute Maximum Ratings* Parameter 1 Supply voltage with respect Voltage on any pin other than supplies 3 Current at any pin other than supplies 4 Storage Temperature * Exceeding these values may cause permanent damage. ...
Page 17
MT88E45 DC Electrical Characteristics Characteristics 8 DCLK Output Low Sink DATA Current DR/STD CD, EST ST/GT 9 IN1+ Input Current IN1- IN2+ IN2- DCLK CB0 CB1 CB2 Output High- Impedance Current 11 V Output Voltage REF 1 ...
Page 18
Advance Information AC Electrical Characteristics Characteristics 1 Accept Signal Level Range 2 Bell 202 Format Reject Signal Level 3 Transmission Rate 4 Mark and Space Frequencies Bell 202 1 (Mark) Bell 202 0 (Space) CCITT V.23 1 (Mark) CCITT V.23 ...
Page 19
MT88E45 AC Electrical Characteristics Characteristics 1 Tone present detect time 2 Tone absent detect time † AC Electrical Characteristics are over recommended operating conditions unless otherwise stated. AC Electrical Characteristics Characteristics 1 Power-up time OSC2 2 Power-down time 3 Input ...
Page 20
Advance Information AC Electrical Characteristics Characteristics 1 Frequency 2 Duty cycle DCLK 3 Rise time 4 DCLK low set DCLK DR/STD 5 DCLK low hold time after DR † AC Electrical Characteristics are over recommended operating conditions ...
Page 21
MT88E45 DATA DCLK Figure 10 - DATA and DCLK Mode 0 Output Timing DR DCLK CDD DCD Figure Output Timing t R1 Figure 12 ...
Page 22
Advance Information start TIP/RING (A/B) WIRES stop t IDD start DATA (Output) stop DCLK (Output (Output) Figure 13 ...
Page 23
MT88E45 1st Ring TIP/RING B A PWDN Note 2 Note OSC2 FSKen Note Note 5 DCLK DATA Figure 15 - Application Timing for Bellcore On-hook Data Transmission Associated with Ringing, Notes: This on-hook case ...
Page 24
Advance Information CPE goes off-hook TIP/RING CAS A Note 1 PWDN Note 8 Hybrid CASen Note 8 FSKen Note 2 Note OSC2 t DP EST t GP ST/GT t REC STD Note 9 Note ...
Page 25
MT88E45 Line Reversal ‘Idle State Tone Alert Signal’ DT-AS A/B Wires A B PWDN Note 6 Tip/Ring CASen t Note 6 DP EST t GP Note 1 ST/GT t REC STD Note 7 15 1ms TE DC load <120 Aµ ...
Page 26
Advance Information Line Reversal (Optionally sent) Ring Burst A/B Wires A B Note 1 250-400ms PWDN Note load TE AC load FSKen Note Note 4 DCLK DATA t PU OSC2 Figure 18 - Application ...
Page 27
MT88E45 16-Pin DIM Min Max Min A 0.093 0.104 0.093 (2.35) (2.65) (2.35) A 0.004 0.012 0.004 1 (0.10) (0.30) (0.10) B 0.013 0.020 0.013 (0.33) (0.51) (0.33) C 0.009 0.013 0.009 (0.231) (0.318) (0.231) D 0.398 ...
Page 28
Advance Information Notes: 1) Not to scale 2) Dimensions in inches 3) (Dimensions in millimeters) 4) Ref. JEDEC Standard M0-150/M0118 for 48 Pin 5) A & B Maximum dimensions include allowable mold flash Note: Governing controlling dimensions for 48 Pin ...
Page 29
...
Page 30
...
Page 31
... Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned ...