DS1865 19-5044 Rev 1 11/09 PON Triplexer Control and Monitoring Circuit General Description Features The DS1865 controls and monitors all the burst-mode Meets GEPON, BPON, and GPON Timing transmitter and video receiver biasing functions for a Requirements for Burst-Mode Transmitters passive optical network (PON) triplexer. It has an APC Bias Current Control Provided by APC Loop with loop with tracking-error compensation that provides the reference for the laser driver bias current and a temper- Tracking-Error Compensation ature-indexed lookup table (LUT) that controls the mod- Modulation Current is Controlled by a ulation current. It continually monitors for high output Temperature-Indexed Lookup Table current, high bias current, and low and high transmit power with its internal fast comparators to ensure that Laser Power Leveling from -6dB to +0dB laser shutdown for eye safety requirements are met with- Two 8-Bit Analog Outputs, One is Controlled by out adding external components. Six ADC channels MON4 Voltage for Video Amplifier Gain Control monitor V , internal temperature, and four external CC monitor inputs (MON1MON4) that can be used to meet Internal Direct-to-Digital Temperature Sensor transmitter and video receive signal monitoring require- Six Analog Monitor Channels: Temperature, V , CC ments. Two digital-to-analog converter (DAC) outputs MON1, MON2, MON3, and MON4 are available for biasing the video receiver channel, and five digital I/O pins are present to allow additional moni- Five Digital I/O Pins for Additional Control and toring and configuration. Monitoring Functions Comprehensive Fault Management System with Applications Maskable Laser Shutdown Capability Optical Triplexers with GEPON, BPON, or GPON Two-Level Password Access to Protect Transceiver Calibration Data 120 Bytes of Password 1 Protected Nonvolatile Memory 128 Bytes of Password 2 Protected Nonvolatile Pin Configuration Memory in Main Device Address 128 Bytes of Nonvolatile Memory Located at A0h TOP VIEW Slave Address 2 I C-Compatible Interface for Calibration and 28 27 26 25 24 23 22 Monitoring Operating Voltage: 2.85V to 3.9V BEN 1 21 MOD Operating Temperature Range: -40C to +95C TX-D 2 20 BIAS Packaging: 28-Pin Lead-Free TQFN (5mm x 5mm TX-F 3 19 V CC x 0.8mm) FETG 4 18 GND DS1865 V 5 17 M4DAC CC Ordering Information GND 6 16 DAC1 *EP PART TEMP RANGE PIN-PACKAGE 7 MON4 N.C. 15 DS1865T+ -40C to +95C 28 TQFN-EP* 8 9 10 11 12 13 14 DS1865T+T&R -40C to +95C 28 TQFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. TQFN T&R = Tape and reel. (5mm x 5mm x 0.8mm) *EXPOSED PAD. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. SDA D3 SCL D2 N.C. D1 N.C. N.C. MON1 D0 MON2 LOSI MON3 BMDPON Triplexer Control and Monitoring Circuit ABSOLUTE MAXIMUM RATINGS Voltage Range on MON1MON4, BEN, BMD, and Operating Temperature Range ...........................-40C to +95C TX-D Pins Relative to Ground.................-0.5V to (V + 0.5V) Programming Temperature Range .........................0C to +70C CC (subject to not exceeding +6V) Storage Temperature Range .............................-55C to +125C Voltage Range on V , SDA, SCL, D0D3, and Soldering Temperature...................See J-STD-020 Specification CC TX-F Pins Relative to Ground ...............................-0.5V to +6V Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS (T = -40C to +95C, unless otherwise noted.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) +2.85 +3.9 V CC High-Level Input Voltage 0.7 x V + CC V V IH:1 (SDA, SCL, BEN) V 0.3 CC Low-Level Input Voltage 0.3 x V -0.3 V IL:1 (SDA, SCL, BEN) V CC High-Level Input Voltage V + CC V 2.0 V IH:2 (TX-D, LOSI, D0, D1, D2, D3) 0.3 Low-Level Input Voltage V -0.3 0.8 V IL:2 (TX-D, LOSI, D0, D1, D2, D3) DC ELECTRICAL CHARACTERISTICS (V = +2.85V to +3.9V, T = -40C to +95C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current I (Notes 1, 2) 5 10 mA CC Output Leakage I 1A LO (SDA, TX-F, D0, D1, D2, D3) I = 4mA 0.4 Low-Level Output Voltage OL V V OL (SDA, TX-F, FETG, D0, D1, D2, D3) I = 6mA 0.6 OL High-Level Output Voltage V - CC V I = 4mA V OH OH (FETG) 0.4 FETG Before Recall (Note 3) 10 100 nA Input-Leakage Current I 1A LI (SCL, BEN, TX-D, LOSI) Digital Power-On Reset POD 1.0 2.2 V Analog Power-On Reset POA 2.1 2.75 V 2 DS1865