4N55, 4N55/L2, L3, L4: Optocoupler, 16 Pin Dual Channel High Speed Hermetically Sealed (Datasheet) Hutton Close, Crowther Ind Est, Dist 3, Washington, Tyne & Wear NE38 0AH, England Email: isocom@dial.pipex.com - Tel: +44 0191 4166546 - Fax: +44 0191 4155055 4N55, 4N55/L2, L3, L4 Dual Channel High Speed Hermetically Sealed Optocoupler Circuit and Package Features Description Absolute Maximum Ratings Recommended Operating Conditions Electrical Characteristics Typical Characteristics Radiation Effects Data Reliability and Approvals Similar Optocouplers Home Page Circuit and Package file:///C|/SHRUTI/iscl/4n55.htm (1 of 5) [2/5/2001 5:55:33 PM] 4N55, 4N55/L2, L3, L4: Optocoupler, 16 Pin Dual Channel High Speed Hermetically Sealed (Datasheet) Features Release to BS9400 GO125 Hermetically Sealed High Speed: Typically 400 kbit/s 1500 Vdc Withstand Test Voltage High Radiation Immunity Performance Guaranteed Over -55C to +125C Ambient Temperature Range 2 MHz Bandwidth Description The 4N55 consists of two independent optocouplers in a hermetically sealed ceramic package. Each channel has a light emitting diode and an integrated photon detector. Separate connections for the photodiodes and output transistor collectors improve the speed up to 100 times that of a conventional phototransistor optocoupler by reducing the base collector capacitance. The 4N55 is suitable for wide bandwidth analogue applications, as well as for interfacing TTL to LSTTL or CMOS. The availability of the base lead allows optimised gain/bandwidth adjustment in analog applications. The shallow depth of the IC photodiode provides better radiation immunity than conventional phototransistor couplers. Surface Mount Option Available. Absolute Maximum Ratings Storage Temperature: Operating Temperature: Lead Soldering: -65C to +150C -55C to +125C 260C for 10s, 1.6mm from case Input Diode (each channel) Peak forward current IF: Average Forward Current IF: Reverse Voltage VR: Power Dissipation: 40mA (duration <= 1ms) 20mA 5V 36mW Output Detector (each channel) file:///C|/SHRUTI/iscl/4n55.htm (2 of 5) [2/5/2001 5:55:33 PM] 4N55, 4N55/L2, L3, L4: Optocoupler, 16 Pin Dual Channel High Speed Hermetically Sealed (Datasheet) Supply Voltage VCC: -0.5V to 20V (1 minute max) Average Current IO: 8mA Peak Current IO: 16mA Voltage VO: -0.5V to 20V Emitter-Base Reverse Voltage BVEBO: 3V 5mA Base Current IB: 50mW Power Dissipation: 1.4mW/C above 100C Derate Linearly: Recommended Operating Conditions PARAMETER SYMBOL MIN MAX UNIT Input Current, Low Level (each channel) IFL 250 A Supply Voltage, Output VCC 2 18 V Electrical Characteristics (Over recommended temperature Ta= -55C to +125C u.o.s.; all typical values at Vcc=5V, Ta=25C each channel.) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT NOTES IOH Logic High Output Current IF=0, VO=VCC=18V, IF(other channel)=20mA 30 100 A Output Leakage Current IF=250A, ... 70 250 A 30 200 A 10 A ICCL Logic Low Supply Current VCC=18V, IF1,2=20mA ICCH Logic High Supply Current VCC=18V, IF=0mA, IF(other channel)=20mA 0.4 VF Input Forward Voltage IF=20mA 1.45 1.8 BVR Input Reverse Breakdown I =10A 3 R Voltage RH=45%, TA=25C, t=5s, Input-Output Insulation VIO=1500Vdc Leakage Current II-O tPLH tPHL Propagation Delay Time to RL=8.2kohm, CL=50pF, Logic High at Output Propagation Delay Time to IF=16mA, VCC=5V Logic Low at Output file:///C|/SHRUTI/iscl/4n55.htm (3 of 5) [2/5/2001 5:55:33 PM] 1 V 1 V 2.0 1.0 A 6.0 s 3, 9 1 0.4 2.0 s 4N55, 4N55/L2, L3, L4: Optocoupler, 16 Pin Dual Channel High Speed Hermetically Sealed (Datasheet) CTR Current Transfer Ratio VO=0.4V, IF=16mA, VCC=4.5V 9 20 % 1, 2 Typical Characteristics SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT NOTES dVF/dTA Temperature Coefficient of Forward Voltage IF=20mA -1.9 mV/C CIN Input Capacitance VF=0, f=1MHz 125 pF RI-O Resistance (Input-Output) VI-O=500Vdc 1E12 ohm CI-O Capacitance (Input-Output) f=1MHz 1.0 pF II-I Input-Input Insulation Leakage Current RH=45%, VH=500Vdc, t=5s 1 pA CI-I Capacitance (Input-Input) f=1MHz 0.6 pF hFE Transistor DC Current Gain Small Signal Current Transfer Ratio dIO/dIF VO=5V, IO=3mA 1 1, 4 5 130 1 VCC=5V, VO=2V 20 % CMH Common Mode Transient VCM=10Vp-p, RL=8.2kohm, IF=0, Immunity at Logic High Level Output VO(min)=2.0V 1000 V/s 1, 6 CML Common Mode Transient VCM=10Vp-p, RL=8.2kohm, IF=16, Immunity at Logic Low Level Output VO(max)=0.8V -1000 V/s 1, 7 BW Bandwidth 2 MHz 8 RL=100ohm Notes 1. Each channel. 2. Current Transfer Ratio is defined as the ratio of output collector current Io to the forward LED input current If, times 100%. CTR is known to degrade slightly over the unit's lifetime as a function of input current, temperature, signal duty cycle and system on-time. It is recommended that designers allow at least 20-25% guardband for CTR degradation. 3. Measured between pins 1 through 8 shorted together and pins 9 through 16 shorted together. 4. Measured between each input pair shorted together and the output pins for that channel shorted together. 5. Measured between pins 3 and 4 shorted together, and pins 7 and 8 shorted together. 6. CMh is the steepest slope (dV/dt) on the leading edge of the common mode pulse Vcm for which the output will remain in the logic high state (Vo>2.0V). file:///C|/SHRUTI/iscl/4n55.htm (4 of 5) [2/5/2001 5:55:33 PM] 4N55, 4N55/L2, L3, L4: Optocoupler, 16 Pin Dual Channel High Speed Hermetically Sealed (Datasheet) 8. CMl is the steepest slope (dV/dt) on the trailing edge of the common mode pulse Vcm for which the output will remain in the logic low state (Vo<0.8V). 9. This is a momentary withstand test, not an operation condition. Radiation Effects Data Neutron Fluence: Hard to > 3E12n/cm2 Total Dose: Hard to 1 Mrad (Si) Dose Rate: Hard to 6E9 rad (Si)/sec Vcc photocurrent up to 1.6A; up to 5s output transient upset Reliability and Approvals Isocom Ltd supplies high reliability devices for applications requiring an operating temperature range of -55C to +125C (e.g. military applications). Devices supplied have completed rigorous testing, and various high reliability test options are offered. The Company is developing a suitable specification to permit release to CECC 20000. As a manufacturer of high reliability optocouplers Isocom Ltd's manufacturing plant in North East England, has site approval to BS9000 (registered number 1294/M) issued by the British Standards Institution. Together with CECC, BS9000 is a preferred standard for use in European military projects. Consequently, Isocom Ltd's approved devices are listed in the CECC "MUAHAG" preferred products list. The BS9000 approval is also recognised as meeting the equivalent criteria to those required by BS5750/ISO9000/EN29000. The Company's customers can be assured of our commitment to stringent quality, reliability and inspection standards, as demonstrated by our existing approvals. Other customer-specific options can also be offered. Isocom takes great effort to ensure accurate data, but regrettably cannot be held liable for any error on its website. Visit File Lists to confirm old printouts are up-to-date. Contents file:///C|/SHRUTI/iscl/4n55.htm (5 of 5) [2/5/2001 5:55:33 PM]