MT9044AL1 Zarlink Semiconductor, Inc., MT9044AL1 Datasheet
MT9044AL1
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MT9044AL1 Summary of contents
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Features • Supports AT&T TR62411 and Bellcore GR-1244-CORE Stratum 3, Stratum 4 Enhanced and Stratum 4 timing for DS1 interfaces • Supports ITU-T G.813 Option 1 clocks for 2048 kbit/s interfaces • Supports ITU-T G.812 Type IV clocks for 1,544 ...
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MT9044 VDD 7 OSCo 8 OSCi 9 VSS 10 F16o 11 MT9044AP 12 RSP 13 F0o TSP 14 F8o 15 C1. AVDD ...
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Pin Description (continued) Pin # Pin # Name PLCC MQFP 12 6 RSP Receive Sync Pulse (CMOS Output). This is an 8kHz 488ns active high framing pulse, which marks the end of an ST-BUS frame. This is typically used for ...
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MT9044 Pin Description (continued) Pin # Pin # Name PLCC MQFP 34 28 LOS1 Primary Reference Loss (TTL Input). Typically, external equipment applies a logic high to this input when the PRI reference signal is lost or invalid. The logic ...
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Functional Description The MT9044 is a Multitrunk System Synchronizer, providing timing (clock) and synchronization (frame) signals to interface circuits for T1 and E1 Primary Rate Digital Transmission links. Figure 1 shows the functional block diagram which is described in the ...
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MT9044 from Normal to Holdover. In Holdover Mode, the DPLL no longer uses the virtual reference signal, but generates an accurate clock signal using storage techniques. The Compare Circuit then measures the phase delay between the current phase (feedback signal) ...
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In Normal Mode, the DCO provides an output signal which is frequency and phase locked to the selected input reference signal. In Holdover Mode, the DCO is free running at a frequency equal to the last (less 30ms to 60ms) ...
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MT9044 Input Impairment Monitor This circuit monitors the input signal to the DPLL and automatically enables the (Auto-Holdover) when the frequency of the incoming signal is outside the auto-holdover capture range (See AC Electrical Characteristics - Performance). This includes a ...
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MS2 MS1 Control 0 0 MANUAL 0 1 MANUAL 1 0 MANUAL 1 1 AUTO State Machine Control Table 3 - Operating Modes and States Manual Control Manual Control should be used when either very simple MT9044 control is required, ...
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MT9044 master clock may have a temperature coefficient of ±0.1ppm per degree degree change in temperature, while the MT9044 is in Holdover Mode may result in an additional offset (over the ±0.05ppm) in frequency accuracy of ...
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Description Input Controls MS2 MS1 RSEL GTi Legend Change / Not Valid MTIE State ...
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MT9044 Description Input Controls LOS2 LOS1 GTi RST Legend Change MTIE State ...
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MT9044 Measures of Performance The following are some synchronizer performance indicators and their corresponding definitions. Intrinsic Jitter Intrinsic jitter is the jitter produced synchronizing circuit and is measured at its output measured by applying a reference signal with ...
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MT9044 the storage value is determined while the device is in Normal Mode and locked to an external reference signal. The absolute Master Clock (OSCi) accuracy of the MT9044 does not affect Holdover accuracy, but the change in OSCi accuracy ...
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MT9044 and Network Specifications The MT9044 fully meets all requirements (intrinsic jitter/wander, jitter/wander tolerance, jitter/wander transfer, frequency accuracy, frequency holdover accuracy, capture range, phase change slope and MTIE rearrangement) for the following specifications. 1. Bellcore GR-1244-CORE June 1995 for Stratum ...
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MT9044 CTS CXO-65-HG-5-C-20.0MHz Frequency: 20MHz Tolerance: 25ppm 0C to 70C Rise & Fall Time: 8ns (0.5V 4.5V 50pF) Duty Cycle: 45% to 55% The output clock should be connected directly (not AC coupled) to the OSCi input of the MT9044, ...
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An unsymmetrical Guard Time Circuit is shown in Figure 12. MT9044 GTo R C 150kΩ 1kΩ GTi R P 1kΩ Figure 12 - Unsymmetrical Guard Time Circuit Figure 13 shows a typical timing example of an ...
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MT9044 Reset Circuit A simple power up reset circuit with about a 50us reset low time is shown in Figure 14. Resistor R for protection only and limits current into the RST pin during power down conditions. The reset low ...
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To Line 1 MT9075 DSTo TTIP To DSTi TX Line TRING XFMR F0i RTIP C4i To RRING RX Line RxFP XFMR LOS To Line 2 MT9075 DSTo TTIP DSTi To TRING TX Line XFMR F0i RTIP C4i RRING To RX ...
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MT9044 To E1 Line MT9075 DSTo TTIP DSTi To TX Line TRING XFMR F0i RTIP C4i To RRING RX Line RxFP XFMR LOS MT90840 To OC3 Line STo0-7 PDo0-7 STi0-7 To PPFTo TX Line XFMR F0i PDi0-7 C4b To PCKR ...
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Absolute Maximum Ratings* - Parameter 1 Supply voltage 2 Voltage on any pin 3 Current on any pin 4 Storage temperature 5 PLCC package power dissipation 6 MQFP package power dissipation * Exceeding these values may cause permanent damage. Functional ...
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MT9044 AC Electrical Characteristics - Performance Characteristics 1 Freerun Mode accuracy with OSCi at Holdover Mode accuracy with OSCi at Capture range with OSCi at Phase lock time 11 Output phase ...
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AC Electrical Characteristics - Input/Output Timing Characteristics 1 Reference input pulse width high or low 2 Reference input rise or fall time 3 8kHz reference input to F8o delay 4 1.544MHz reference input to F8o delay 5 2.048MHz reference input ...
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MT9044 PRI/SEC 8kHz PRI/SEC 1.544MHz PRI/SEC 2.048MHz F8o NOTES: 1. Input to output delay values are valid after a TRST or RST with no further state changes Figure 20 - Input to Output Timing (Normal Mode) F8o F0o F16o t ...
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F8o C2o RSP TSP F8o MS1,2 LOS1,2 RSEL, GTi Figure 23 - Input Controls Setup and Hold Timing AC Electrical Characteristics - Intrinsic Jitter Unfiltered Characteristics 1 Intrinsic jitter at F8o (8kHz) 2 Intrinsic jitter at F0o (8kHz) 3 Intrinsic ...
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MT9044 AC Electrical Characteristics - C1.5o (1.544MHz) Intrinsic Jitter Filtered Characteristics 1 Intrinsic jitter (4Hz to 100kHz filter) 2 Intrinsic jitter (10Hz to 40kHz filter) 3 Intrinsic jitter (8kHz to 40kHz filter) 4 Intrinsic jitter (10Hz to 8kHz filter) † ...
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AC Electrical Characteristics - 2.048MHz Input to 2.048 MHz Output Jitter Transfer Characteristics 1 Jitter at output for 1Hz@3.00UIpp input 2 with 40Hz to 100kHz filter 3 Jitter at output for 3Hz@2.33UIpp input 4 with 40Hz to 100kHz filter 5 ...
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MT9044 AC Electrical Characteristics - 1.544MHz Input Jitter Tolerance Characteristics 1 Jitter tolerance for 1Hz input 2 Jitter tolerance for 5Hz input 3 Jitter tolerance for 20Hz input 4 Jitter tolerance for 300Hz input 5 Jitter tolerance for 400Hz input ...
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Notes: Voltages are with respect to ground (V ) unless otherwise stated. SS Supply voltage and operating temperature are as per Recommended Operating Conditions. Timing parameters are as per AC Electrical Characteristics - Timing Parameter Measurement Voltage Levels 1. ...
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Package Outlines Dim D General- (lead coplanarity) A Notes Not ...
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Index Pin 1 44-Pin Dim Min Max A - 0.096 (2.45) A1 0.01 - (0.25) A2 0.077 0.083 (1.95) (2.10) b 0.01 0.018 (0.30) (0.45) D 0.547 BSC (13.90 BSC) D 0.394 BSC ...
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Package Outlines 160-Pin Dim Min 0.125 (3.17) b 0.009 (0.22) D 1.23 BSC (31.2 BSC) D 1.102 BSC 1 (28.00 BSC) E 1.23 BSC (31.2 BSC) E 1.102 BSC 1 (28.00 BSC) e 0.025 BSC (0.65 ...
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