CXB1828ER 2.5Gbps Laser Diode Driver Description The CXB1828ER is a high-speed monolithic laser diode driver. This IC can drive the data rate of 2.5Gbps and the modulation current of up to 50mA. The bias current of up to 50mA can be supplied and it is controlled by the built-in APC (automatic power control). The modulation current and bias current are designed to be linearly controlled by the voltage input to the control pin. This IC has a built-in DFF, and through mode or DFF mode can be selected. In through mode the signal goes as it is, and in DFF mode the input signal is retimed by the external clock. The data input pin and the clock input pin can accept the differential input of PECL and CML, and the 50Ω termination resistors are provided in the IC. The shutdown function which shuts down the modulation current and bias current, the activity error detect circuit which detects that the signal has no input, and the alarm output power-on reset circuit. Furthermore, the duty cycle control circuit which corrects the modulation output signal duty is included in this IC. The CXB1828ER employs the 4.8mm × 4.8mm of 32-pin plastic package, contributing to the miniaturization of the optical mode. Features • Direct laser diode drive • Maximum data rate of 2.5Gbps • Power-on reset function • Automatic power control (APC) for bias current • Alarm function and shutdown function • Differential PECL and CML inputs or AC coupled input • Internal duty cycle correction circuit • Activity error detector function for laser safety • Typical rise time is 80ps. • Built-in 50Ω input termination resistor • Compact package size: 4.8mm × 4.8mm • Single +3.3V supply voltage 32 pin VQFN (Plastic) Absolute Maximum Ratings • Supply voltage Vcc – VEE –0.3 to +6.0 V • Data and clock input voltage difference |VD – VDN| 2.5 V • Bias output current 100 mA • Modulation output current 100 mA • Storage temperature Tstg –65 to +150 °C Recommended Operating Conditions • Supply voltage Vcc – VEE 3.14 to 3.46 • Operating ambient temperature Ta –40 to +85 V °C Important Notes The IC requires SLOW turning power on and off. See Vcc rise and fall time in AC characteristics. Electrostatic Strength This IC has a very sensitive electrostatic strength, so care should be taken for handling. Typical Transmit Block Diagram Transmit Path Sony CXB1828ER Applications • Gigabit ethernet: 1.25Gbps • SONET/SDH: 622Mbps, 2.5Gbps Sony SerDes Laser Diode Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. –1– E01Y22-PS BIAS_MON DUTY THRUMODE Block Diagram MOD_MON CXB1828ER Vcc – 1.4V QB 10kΩ DIN Q 50Ω 1 MUX 0 50Ω DINB Duty Control Vcc – 1.4V 10kΩ D CKIN Q 50:1 50Ω kill Q 50Ω CKINB Activity Error Detector BIAS AED_CAP 50:1 AED_DISABLE kill 1.8V WCVH High S Vref Gen. WCVL Q BIAS_SET 4kΩ Low 0.3V Vcc Voltage Error Det. R Time Stretcher Q OP_OUT Vref 1.1V OP_IN to Modulation/Bias Control TIME_CAP SHUTDOWN SHUTDOWNB 60kΩ BIAS_MON MOD_MON AED_CAP TIME_CAP THRUMODE VEE2 DUTY Pin Assignment AED_DISABLE RREF ALARM 15kΩ 24 23 22 21 20 19 18 17 DIN 25 16 VCCO DINB 26 15 QB VEE1 27 14 Q VCC1 28 13 VEEO1 CKIN 29 12 VEEO2 CKINB 30 11 BIAS WCVH 31 10 OP_IN 2 3 4 5 6 7 8 VCC2 SHUTDOWN ALARM RREF VREF MOD_SET BIAS_SET 9 1 SHUTDOWNB WCVL 32 –2– OP_OUT Vref Gen 1.9V VREF MOD_SET CXB1828ER Pin Description Pin No. 1 2 Symbol Vcc2 SHUTDOWNB Typical pin voltage (V) I/O DC Description Equivalent circuit 3.3 0 or Vcc Positive power supply. TTL input. The modulation current and bias current is shut down by inputting the Low voltage to this pin. High level when open. Vcc2 I 10kΩ 2 10kΩ 3 3 SHUTDOWN 0 or Vcc I TTL input. The modulation current and bias current is shut down by inputting the High voltage to this pin. High level when left open. VEE2 Vcc2 4 ALARM TTL output. High when the abnomality is detected from the OP_IN pin voltage. The abnormal voltage of OP_IN is Vop < 0.3V or Vop > 1.8V. 4 O VEE2 Vcc2 5 5 Connect an external resistor of 18kΩ between this pin and Vcc. RREF VEE2 –3– CXB1828ER Pin No. Symbol Typical pin voltage (V) I/O DC Equivalent circuit Description Vcc2 6 VREF 1.9 Reference voltage output. GND reference 1.9V. 6 O 26.4KΩ VEE2 Vcc2 7 MOD_SET 0.2 to 2.0 Modulation current control. The modulation current is controlled by this pin voltage. I 7 8 8 BIAS_SET 0.2 to 2.0 Bias current control. The bias current is controlled by the voltage of this pin. I VEE2 Vcc2 150kΩ 9 OP_OUT 4kΩ 9 O Internal operational amplifier output. Used for the bias current automatic power control (APC). The OP_OUT pin is connected to the BIAS_SET pin. Connect a 0.1µF capacitor between this pin and GND. VEE2 Vcc2 The internal operational amplifier input for the bias current automatic power control (APC). 10 10 OP_IN 0.3 to 1.8 I VEE2 –4– CXB1828ER Pin No. Symbol Typical pin voltage (V) I/O DC Equivalent circuit Description VCC1 11 11 BIAS O Laser bias current output. Current Source VEEO2 12 VEEO2 0 Negative power supply for the modulation and bias output. 13 VEEO1 0 Negative power supply for the modulation output. VCCO 14 14 Q O 15 QB O 15 Current Source VEEO1 16 VccO VEEO1 BIAS_MON Complementary current output. Connect the laser diode not to this pin, but to the Q pin. Positive power supply for the modulation output. 3.3 VCC1 17 Laser modulation current output. Open collector output. O 17 Bias current monitor. 1/50 of the bias current flows to this pin. This pin is connected to Vcc either through a resistor 1kΩ or directly. 18 Current Source 18 MOD_MON O VEE1 (MOD_MON) VEEO2 (BIAS_MON) –5– Modulation current monitor. 1/50 of the modulation current flows to this pin. This pin is connected to Vcc either through a resistor 1kΩ or directly. CXB1828ER Pin No. Symbol Typical pin voltage (V) I/O DC Equivalent circuit Description Vcc2 30pF 19 19 AED_CAP 500Ω Capacitor connection for the activity error detector. If the active detector function is not required, this pin can be left open. When a capacitor is connected between the AED_CAP pin and Vcc, the time till the error is detected can be extended. VEE2 Vcc2 20 20 TIME_CAP 500Ω 30pF Capacitor connection for the alarm power-on reset. The period of the power-on reset time is controlled by a capacitor (recommended value is 0.01µF) connected between the TIME_CAP pin and GND. If the ALARM function is not required, this pin can be left open. VEE2 Vcc2 10kΩ 21 10kΩ 21 AED_DISABLE I TTL input. This pin controls the activity error detector circuit. When High (open or connected to Vcc), the activity error detector function is disabled. When Low (connected to GND), the activity error detector function is enabled. VEE2 Vcc2 10kΩ 22 10kΩ 22 THRUMODE I VEE2 –6– TTL input. When High (open or connected to Vcc), the input data goes not through the D flip-flop. When Low (connected to GND), the serial input data goes through the D flip-flop within the chip. CXB1828ER Pin No. Symbol Typical pin voltage (V) I/O DC Equivalent circuit Description Vcc1 23 DUTY 300Ω 23 300Ω Resistor connection for the duty cycle control. When an external resistor is connected between the DUTY pin and GND, the modulation pulse width can be expanded. VEE1 24 VEE2 Negative power supply. 0 Vcc1 25 DIN PECL or CML 26 25 50Ω I 50Ω 10kΩ 26 Differential PECL and CML data inputs. These two inputs are internally connected by 100Ω and biased by 10kΩ to Vcc – 1.4V. DINB VEE1 27 VEE1 0 Negative power supply. 28 Vcc1 3.3 Positive power supply. Vcc1 29 CKIN PECL or CML 30 29 50Ω I 50Ω 10kΩ 30 Differential PECL and CML clock inputs. These two inputs are internally connected by 10kΩ and biased by 10kΩ to Vcc – 1.4V. CKINB VEE1 Vcc2 31 WCVH Window comparator's higher threshold voltage for ALARM. The default high alarm assert voltage for the comparator is 1.8V. 1.8 31 36kΩ VEE2 –7– CXB1828ER Pin No. Symbol Typical pin voltage (V) I/O DC Equivalent circuit Description Vcc2 32 WCVL 0.3 8kΩ 31 6kΩ VEE2 –8– Window comparator's lower threshold voltage for ALARM. The default low alarm assert voltage for the comparator is 0.3V. CXB1828ER Electrical Characteristics DC Characteristics Item (Vcc – VEE = 3.14 to 3.46V, Ta = –40 to +85°C) Symbol Conditions Vcc – VEE Min. Typ. Max. Unit 3.14 3.3 3.46 V DC power supply voltage VDC Supply current (DATA THRU MODE) ICC_THRU IQ = 0mA, IB = 0mA 62 84 mA Supply current (D-FF MODE) ICC_DFF 65 88 mA Maximum modulation output current IQMAX Minimum modulation output current IQMIN Modulation output voltage range VQ Maximum bias output current IBMAX Minimum bias output current IBMIN Bias output voltage range VB Modulation shutdown current IQ = 0mA, IB = 0mA mA 50 Vcc – 2 7 mA Vcc V mA 50 3 mA Vcc V IQSHD 100 µA Bias shutdown current IBSHD 100 µA DIN, CKIN input High voltage (PECL) VEIH ∗1 Vcc – 1.17 Vcc – 0.81 V DIN, CKIN input Low voltage (PECL) VEIL ∗1 Vcc – 1.84 Vcc – 1.48 V DIN, CKIN differential input voltage (CML) VIN ∗2 400 2000 mVp-p Internal resistance between DIN and DINB, CKIN and CKINB RDI, RCK 70 130 Ω Internal input reference voltage at DIN, DINB, CKIN, CKINB VEIR TTL input High voltage VTIH 2.0 Vcc + 0.3 V TTL input Low voltage VTIL –0.3 0.8 V TTL input current High ITIH 5 µA TTL input current Low ITIL ALARM output High voltage VTOH Iin = –0.4mA 2.4 Vcc V ALARM output Low voltage VTOL Iin = 2.0mA 0 0.5 V VREF output voltage VREF Iout = 0 to 500µA 1.80 2.05 V WCVH output voltage VWH Open voltage 1.70 2.05 V WCVL output voltage VWL Open voltage 0.28 0.37 V Vcc voltage error detect voltage Vcc_err 2.59 3.08 V Vcc – 2 Vcc – 1.37 V µA –250 ∗1 Since the internal input reference voltage may become lower than the Low level of ECL, input the signal into DIN and CKIN by AC coupling at the time of a single phase input. –9– CXB1828ER ∗2 Min.: 200mV for each input Max.: 1000mV for each input VIN AC Characteristics (Vcc – VEE = 3.14 to 3.46V, Ta = –40 to +85°C) Item Symbol Conditions Min. Typ. Max. Unit 2.488 Gbps 100 ps Maximum data rate fdmax Maximum variable High pulse width by duty cycle control tdelay Data rate = 2.5Gbps IQ = 50mA, RL = 25Ω 80 ps Fall time (80 to 20%) tr tf IQ = 50mA, RL = 25Ω 90 ps DIN – CKIN setup time ts Rise and fall time of input = 130ps∗3 30 ps DIN – CKIN hold time th Rise and fall time of input = 130ps∗3 50 ps Vcc rise time tvccr tvccf 10 to 90% 5 ms 90 to 10% 5 ms Rise time (20 to 80%) Vcc fall time ∗3 DIN ts CKIN th Setup time, Hold time DC/AC Characteristics for the APC Circuit Item Symbol OP_IN input voltage range VI_OP OP_OUT output maximum voltage VO_OPMAX OP_OUT output minimum voltage VO_OPMIN Minimum OP_OUT output voltage at shutdown condition VO_OPSDN OP_IN input current II_OP OP_OUT output source current (Vcc – VEE = 3.14 to 3.46V, Ta = –40 to +85°C) Conditions Min. Typ. Max. Unit V Fig. 15 2.0 V V 0.2 0.2 V 1 µA IO_OPSORC 4 µA OP_OUT output sink current IO_OPSINK 4 µA APC operational amplifier gain AV Monitor photodiode current range IMPD –2.0 dB 12 10 – 10 – 1000 µA CXB1828ER Functional Block Description APC (Automatic power control) The APC loop consists of the laser driver and APC operational amplifier. The APC operational amplifier is configured as an inverting integrator. It is the input voltage that is derived from the monitor current by the monitor photodiode and an external resistor RPD to OP_IN. The input voltage is inverted and the output from OP_OUT. The bias current is controlled by inputting the output to the BIAS_SET pin. The bias current is set by RPD. A capacitor CPD with a value of 1000pF works for stability and reduces the noise. Use CAPC (recommended value 0.1µF) between the OP_OUT pin and VEE. CAPC controls the rapid rise of the OP_OUT pin when the shutdown is cancelled, and suppresses the excess current flowing to the laser diode. Vcc CXB1828ER LD CXB1828ER Monitor PD Modulation Current APC Operational Amplifier Q Bias Current Vref_1.1V OP_IN BIAS OP_OUT 4kΩ 15kΩ CPD 1000pF RPD CAPC 0.1µF 60kΩ Fig.1. APC Function Block Diagram Alarm function This circuit is for the APC operation. When the input OP_IN is provided with an excess voltage or minimal voltage, the window comparator output goes High, and this signal is latched resulting in the output of alarm signal. The WCVH and WCVL pin voltages are the upper and the lower threshold values of the window comparator for ALARM. The default value of WCVH is 1.8V and that of WCVL is 0.3V. If the voltage of OP_IN is lower than WCVL or higher than WCVH, ALARM signal is asserted High. This alarm signal returns to Low only by the Vcc power-on reset function. Power-on reset time (TTIME) is set by the external capacitor put between the TIME_CAP pin and VEE. (Refer to Fig. 8.) It is necessary for the alarm signal output to be Low forcibly because the excess voltage or minimal voltage may be applied to the OP_IN pin till the APC operation completes. The recommended value of the capacitor is 0.01µF. SHUTDOWN/SHUTDOWNB Modulation/Bias Current OFF Activity Error Detector Vcc Voltage Error Detector S Q Time Stretcher R Vcc < 2.9V RS-FF Monitor PD ALARM IN Window Comparator 1.8V OP_IN RPD OUT 0.3V Vcc Voltage Error Detector AED_DISABLE L SHUTDOWN L SHUTDOWNB H Vcc > 2.9V Modulation/Bias Current OFF APC Settling Operational Amplifier for APC Alarm Reset TTIME TIME_CAP CTIME 0.01µF Fig.2. Alarm Function Block Diagram Fig.3. Timing Chart of Alarm Function – 11 – ALARM ENABLE CXB1828ER Data input The PECL/CML signal is input to the data buffer at a maximum data rate of 2.5Gbps. This input pin is biased by the reference bias voltage (Vcc – 1.4V) for the AC coupling input. An on-chip 100Ω resistor is put between the DIN and DINB pins. The data buffer has the frequency detector and input amplitude voltage detector for the Activity Error Detector (AED). Clock input The PECL/CML clock is input to the clock buffer at a maximum data rate of 2.5GHz. This input pin is biased by the reference bias voltage (Vcc – 1.4V) for the AC coupling input. An on-chip 100Ω resistor is put between the CKIN and CKINB pins. Signal duty cycle correction The output pulse width can be extended as shown in Fig.9 by connecting an external resistor between the DUTY pin and VEE, and setting its resistor value from 0Ω to 4kΩ. The output pulse width can be extended up to 100ps (min.). Short the DUTY pin to VEE when not want to vary the duty. DUTY 23 0 to 4kΩ Fig.4. Duty Cycle Control 10kΩ VREF MOD_SET BIAS_SET Bias current and modulation current control The bias current and modulation current can be controlled linearly by the voltage input to the BIAS_SET and MOD_SET pins as shown in Figs.10 and 11. The voltage applied to the BIAS_SET and MOD_SET pins can be set by the external resistor between the VREF pin and VEE. Refer to Fig.5. 6 7 8 10kΩ RMOD RBIAS Fig.5. Modulation/Bias Control Bias current and modulation current monitor This circuit monitors the bias and modulation current. The BIAS_MON and the MOD_MON pins should be connected to VCC either directly or through a resistor. The modulation current and monitor current are in the rate of approximately 50:1. (Refer to Fig.12 and Fig.13.) Thru-mode When this pin is High or connected to Vcc, the input data goes not through the internal flip-flop. If this pin is grounded the input data goes through the D flip-flop. – 12 – CXB1828ER Shutdown function This circuit disables the output current, that is, the bias and modulation current is turned off and used to shut off the laser. And the voltage of OP_OUT is set to VEE. The function block diagram for all of the shutdown mechanism for the circuit is shown in Fig.6. The shutdown functions when one of the following conditions is met. 1) SHUTDOWN is High. 2) SHUTDOWNB is Low. 3) The activity error detector detects an error of the DIN/DINB input signal. 4) The voltage error detector detects Vcc is below 2.59 to 3.08V.∗ (∗ The bias current may flow at approximately Vcc = 2.0V.) Modulation/Bias Current OFF, The voltage of OP_OUT is set to VEE. SHUTDOWN SHUTDOWNB Input Buffer DIN/DINB Activity Error Detector Alarm Reset TIME_CAP Time Stretcher AED_DISABLE AED_CAP Vcc Voltage Error Detector Fig.6. Shutdown Function Block Diagram Activity error detect function The activity error detect circuit monitors the DIN/DINB input signal, and shuts down the output current when this circuit determines that the input data signal has no input. The conditions where the input signal is determined to be no signal are when the input data signal logic is not varied over a period of the time set by the user and when the voltage swing is too small (< 100mVpp-diff). Either of these conditions is met, the shutdown circuit is enabled and the modulation current and laser bias current are shut down. If needed, the time till the activity error detect can be extended. Fig.14 shows the graphs of the activity error detection time (TAED) vs. CAED. When the activity error detect function is not required, connect the AED_DISABE pin to VCC or leave it the pin open. Signal Loss IN OUT DIN/DINB AED_DISABLE L Active Error Detector TAED Fig.7. Timing Chart of AED Function – 13 – CXB1828ER DC Electrical Characteristics Measurement Circuit 24 A A A 23 22 21 20 19 A A 18 17 16 25Ω Vcc – 1.4V 15 10kΩ A 25 A 14 50Ω 1 MUX 0 50Ω A 26 Duty Control 13 27 28 D Vcc – 1.4V Q 50:1 A 12 kill 10kΩ Q 29 50Ω Activity Error Detector 50Ω A 30 11 A 50:1 kill 1.8V V 31 V 32 High Vref Gen. Low 0.3V Vcc Voltage Error Det. Time Stretcher S Q R Q Vref 1.1V 10 A to Modulation/Bias Control 15kΩ 1 2 3 A A 4 V 60kΩ 4kΩ Vref Gen 1.9V 9 5 6 0.4mA or –2.0mA V 7 8 A A V 0 to 500µA 18kΩ A 3.3V – 14 – CXB1828ER AC Electrical Characteristics Measurement Circuit 0 to 4kΩ 24 23 22 21 20 19 18 17 16 51Ω 25Ω Vcc – 1.4V 0.1µF 15 Z0 = 50Ω 10kΩ 25 14 50Ω 51Ω 0.1µF 1 MUX 0 50Ω 26 Duty Control 51Ω 13 27 D 28 Vcc – 1.4V 51Ω 0.1µF Q 50:1 12 kill 10kΩ Q 29 50Ω 0.1µF Activity Error Detector 50Ω 30 11 50:1 kill 1.8V 31 High Vref Gen. 32 Low 0.3V Vcc Voltage Error Det. Time Stretcher S Q R Q Vref 1.1V 10 15kΩ to Modulation/Bias Control 51Ω 1 2 3 4 60kΩ 4kΩ Vref Gen 1.9V 9 5 6 10kΩ 0 to 100kΩ 7 8 10kΩ 0 to 100kΩ 18kΩ Oscilloscope 3.3V – 15 – Oscilloscope 50Ω input CXB1828ER Application Circuit BIAS_MON MOD_MON DUTY THRUMODE RDUTY 0 to 4kΩ Laser Diode Monitor Photodiode RQB QB Vcc – 1.4V 10kΩ RQ Q DIN CPD 1000pF 50Ω 1 MUX 0 50Ω DINB RPD Duty Control Vcc – 1.4V 10kΩ D CKIN Ferrite Bead Q 50:1 50Ω kill Q 50Ω Vcc CKINB BIAS Activity Error Detector CAED AED_CAP 50:1 AED_DISABLE kill 1.8V S Vref Gen. WCVL BIAS_SET CAPC 0.1µF 4kΩ Low 0.3V TIME_CAP Q Vcc Voltage Error Det. Time Stretcher R Q OP_OUT Vref 1.1V 15kΩ to Modulation/Bias Control CTIME 0.01µF SHUTDOWN SHUTDOWNB ALARM Vcc 18kΩ OP_IN 60kΩ Vref Gen 1.9V VREF MOD_SET RVREF 10kΩ RMOD_SET RREF WCVH High RRREF Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. – 16 – CXB1828ER Example of Representative Characteristics 160 Amount of increases in pulse width time [ps] 60 50 TTIME [ms] 40 30 20 10 0 0 0.02 0.04 0.06 0.08 120 100 80 60 40 Ta = –40˚C Ta = +40˚C Ta = +85˚C 20 0 0.10 0 3 4 RDUTY [kΩ] Fig. 8. Power-on reset time (TTIME) vs. CTIME Fig. 9. Increment of output pulse width vs. RDUTY 90 80 80 70 60 Bias current [mA] 60 50 40 30 Ta = –40˚C Ta = +40˚C Ta = +85˚C 10 0 50 40 30 20 20 0 500 1000 1500 2000 Ta = –40˚C Ta = +40˚C Ta = +85˚C 10 0 2500 0 MOD_SET input voltage [mV] Ratio of bias current and bias monitor current [mA] 70 60 50 40 30 20 0 Ta = –40˚C Ta = +40˚C Ta = +85˚C 0 500 1000 1500 2000 1000 1500 2000 2500 Fig. 11. Bias current vs. BIAS_SET input voltage 80 10 500 BIAS_SET input voltage [mV] Fig. 10. Modulation current vs. MOD_SET input voltage Ratio of modulation current and modulation monitor current [mA] 2 1 CTIME [µF] 70 Modulation current [mA] 140 2500 MOD_SET input voltage [mV] 80 70 60 50 40 30 20 Ta = –40˚C Ta = +40˚C Ta = +85˚C 10 0 0 500 1000 1500 2000 2500 BIAS_SET input voltage [mV] Fig. 12. Ratio of modulation current (IQ) and modulation monitor current vs. MOD_SET input voltage – 17 – Fig. 13. Ratio of bias current (IB) and bias monitor current vs. BIAS_SET input voltage CXB1828ER 100 80 OP_OUT output voltage [V] TAED (AED error detection time) [µs] 90 70 60 50 40 30 20 Ta = –40˚C Ta = +40˚C Ta = +85˚C 10 0 0 200 400 600 800 100 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 Ta = –40˚C Ta = +40˚C Ta = +85˚C Vcc = 3.3V 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 CAED [pF] OP_IN input voltage [V] Fig. 14. Activity error detect time (TAED) vs. CAED Fig. 15. OP_OUT output voltage vs. OP_IN input voltage RL = 25Ω Ta = 25˚C IQ = 30mA Pattern = PRBS23 – 1 Data Rate = 2.5Gbps Time base: 100.0ps/div 250mV/div Fig. 16. Electrical Output Waveform 2 FP LD (λ = 1310nm) Ta = 25˚C Pattern = PRBS23 – 1 Data Rate = 2.5Gbps Filter Mask: OC-48 1 3 Time base: 100.0ps/div Fig. 17. Optical Output Waveform – 18 – CXB1828ER 0.8 Unit: mm 0.6 ± 0.2 2.3 0. 15 Foot Print 4.8 39 0. Via hole in PWB Package outline VEE in PWB VEE or solder resist in PWB 0.14 (This area is VEE in IC) IC pin size 0.4 0.2 Package Outline Foot pattern recommended Unit: mm 32PIN VQFN (PLASTIC) 0.9 ± 0.1 0.6 ± 0.1 24 2.3 0.05 S R 0.7 4- C 3 4.4 0. 4.8 17 25 16 A B PIN1 INDEX 9 .3 (0 45˚ 0. 6 (0 .1 5) 9) 32 C 8 x4 0.4 S 1.4 0.1 S A-B C 0.1 S A-B C 0.05 M S A-B C 0.2 ± 0.01 0.03 ± 0.03(∗1) (Stand Off) x4 0.23 ± 0.02 1 Solder Plating NOTE: 1) The dimensions of the terminal section apply to the ranges of 0.1mm and 0.25mm from the end of a terminal. 2) The dimension of (∗1) is apply to DiePad and the lead. 0.13 ± 0.025 + 0.09 0.14 – 0.03 TERMINAL SECTION PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN LEAD TREATMENT SOLDER PLATING EIAJ CODE LEAD MATERIAL COPPER ALLOY JEDEC CODE PACKAGE MASS 0.05g SONY CODE VQFN-32P-04 LEAD PLATING SPECIFICATIONS ITEM SPEC. LEAD MATERIAL COPPER ALLOY SOLDER COMPOSITION Sn-Bi Bi:1-4wt% PLATING THICKNESS 5-18µm – 19 – Sony Corporation