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| LESHAN RADIO COMPANY, LTD. Bias Resistor Transistors NPN Silicon Surface Mount Transistors with Monolithic Bias Resistor Network This new series of digital transistors is designed to replace a single device and its external resistor bias network. The BRT (Bias Resistor Transistor) contains a single transistor with a monolithic bias network consisting of two resistors; a series base resistor and a base-emitter resistor. The BRT eliminates these individual components by integrating them into a single device. The use of a BRT can reduce both system cost and board space. The device is housed in the SOT-23 package which is designed for low power surface mount applications. LMUN2237LT1 * Simplifies Circuit Design * Reduces Board Space * Reduces Component Count PIN 2 BASE (INPUT) R1 R2 PIN 3 COLLECTOR (OUTPUT) PIN 1 EMITTER (GROUND) CASE 318-08, STYLE 6 SOT- 23 (TO-236AB) ESD Rating - MAXIMUM RATINGS (TA = 25C unless otherwise noted) Rating Collector-Base Voltage Collector-Emitter Voltage Collector Current Symbol VCBO VCEO IC Value 50 50 100 Unit Vdc Vdc mAdc THERMAL CHARACTERISTICS Characteristic Total Device Dissipation TA = 25C Derate above 25C Thermal Resistance - Junction-to-Ambient Thermal Resistance - Junction-to-Lead Junction and Storage Temperature Range 1. FR-4 @ Minimum Pad 2. FR-4 @ 1.0 x 1.0 inch Pad Symbol PD Max 230 (Note 1) 338 (Note 2) 1.8 (Note 1) 2.7 (Note 2) 540 (Note 1) 370 (Note 2) 264 (Note 1) 287 (Note 2) -55 to +150 Unit mW C/W C/W C/W C RJA RJL TJ, Tstg LMUN2237LT1-1/4 LESHAN RADIO COMPANY, LTD. LMUN2237LT1 DEVICE MARKING AND RESISTOR VALUES Device LMUN2237LT1 Package SOT-23 Marking A8P R1 (K) 47 R2 (K) 22 3. New devices. Updated curves to follow in subsequent data sheets. ELECTRICAL CHARACTERISTICS (TA = 25C unless otherwise noted) (Continued) Characteristic Symbol Min Typ Max Unit OFF CHARACTERISTICS Collector-Base Cutoff Current (VCB = 40 V, IE = 0) Collector-Emitter Cutoff Current (VCE = 40 V, IB = 0) Emitter-Base Cutoff Current (VBE = 6.0 V, IC = 0) Collector-Base Breakdown Voltage (IC = 10 A, IE = 0) Collector-Emitter Breakdown Voltage (Note 4) (IC = 2.0 mA, IB = 0) ICBO ICEO IEBO V(BR)CBO V(BR)CEO - - - 50 50 - - - - - 50 50 0.13 - - nAdc nAdc mAdc Vdc Vdc ON CHARACTERISTICS (Note 4) DC Current Gain (VCE = 10 V, IC = 5.0 mA) Collector-Emitter Saturation Voltage (IC = 10 mA, IB = 5 mA) Output Voltage (on) (VCC = 5.0 V, VB = 4.0 V, RL = 1.0 k) Input Resistor Resistor Ratio 4. Pulse Test: Pulse Width < 300 s, Duty Cycle < 2.0% hFE VCE(sat) VOL R1 R1/R2 80 140 - - - 0.25 0.2 61.1 2.6 Vdc Vdc k - 32.9 1.7 - 47 2.1 350 PD, POWER DISSIPATION (mW) 250 200 150 100 50 0 -50 RJA = 370C/W 0 50 100 TA, AMBIENT TEMPERATURE (C) 150 Figure 1. Derating Curve LMUN2237LT1-2/4 LESHAN RADIO COMPANY, LTD. TYPICAL ELECTRICAL CHARACTERISTICS - LMUN2237LT1 VCE(sat), COLLECTOR VOLTAGE (VOLTS) 1 IC/IB = 10 TA = -25C 25C 75C 0.1 hFE, DC CURRENT GAIN 1000 VCE = 10 V 75C 100 TA = -25C 25C 10 0.01 0 5 10 20 30 15 25 IC, COLLECTOR CURRENT (mA) 35 40 1 1 10 IC, COLLECTOR CURRENT (mA) 100 Figure 2. V CE(sat) versus IC Figure 3. DC Current Gain 2 1.8 Cob, CAPACITANCE (pF) 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0 5 f = 1 MHz lE = 0 V TA = 25C 10 15 20 25 30 35 40 VR, REVERSE BIAS VOLTAGE (VOLTS) 45 IC, COLLECTOR CURRENT (mA) 100 75C TA = -25C 25C 10 1 0.1 0.01 VO = 5 V 0 2 4 6 8 10 12 Vin, INPUT VOLTAGE (VOLTS) 14 16 0.001 Figure 4. Output Capacitance Figure 5. Output Current versus Input Voltage 100 Vin, INPUT VOLTAGE (VOLTS) VO = 0.2 V TA = -25C 25C 10 75C 1 0 5 15 25 10 20 30 IC, COLLECTOR CURRENT (mA) 35 40 Figure 6. Input Voltage versus Output Current LMUN2237LT1-3/4 LESHAN RADIO COMPANY, LTD. LMUN2237LT1 SOT-23 NOTES: A L 3 1 2 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. BS DIM A B C D G H J K L S V V G C D H K J INCHES MIN MAX 0.1102 0.1197 0.0472 0.0551 0.0350 0.0440 0.0150 0.0200 0.0701 0.0807 0.0005 0.0040 0.0034 0.0070 0.0140 0.0285 0.0350 0.0401 0.0830 0.1039 0.0177 0.0236 MILLIMETERS MIN MAX 2.80 3.04 1.20 1.40 0.89 1.11 0.37 0.50 1.78 2.04 0.013 0.100 0.085 0.177 0.35 0.69 0.89 1.02 2.10 2.64 0.45 0.60 PIN 1. BASE 2. EMITTER 3. COLLECTOR 0.037 0.95 0.037 0.95 0.079 2.0 0.035 0.9 0.031 0.8 inches mm LMUN2237LT1-4/4 |
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