Small Signal Switching Diodes CDST-21/A/C/S-HF Reverse Voltage: 250 Volts Forward Current: 200 mA RoHS Device Halogen Free SOT-23 Features -Fast Switching Speed. 0.118(3.00) 0.110(2.80) -Surface Mount Package Ideally Suited for Automatic Insertion. 3 0.055(1.40) 0.047(1.20) -For General Purpose Switching Applications. 1 -High Conductance. 2 0.079(2.00) 0.071(1.80) Mechanical data 0.006(0.15) 0.003(0.08) -Case: SOT-23, molded plastic. 0.041(1.05) 0.035(0.90) 0.100(2.55) 0.089(2.25) -Terminals: solderable per MIL-STD-750, method 2026. 0.004(0.10) max -Approx. weight: 0.008 grams 0.020(0.50) 0.012(0.30) Circuit diagram 3 1 Dimensions in inches and (millimeter) 3 2 CDST-21-HF 1 0.020(0.50) 0.012(0.30) 3 2 CDST-21A-HF 1 3 2 1 CDST-21C-HF 2 CDST-21S-HF Maximum Ratings and Electrical Characteristics (at Ta=25°C unless otherwise noted) Symbol Value Units Repetitive peak reverse voltage Working peak reverse voltage DC blocking voltage VRRM VRWM VR 250 V Average rectified output current IO 200 mA Parameter Non-repetitive peak forward surge current @ t = 1.0μs @ t = 1.0s IFSM 2.5 0.5 A Repetitive peak forward surge current IFRM 625 mA Power dissipation PD 225 mW RθJA 55 °C/W Junction temperature TJ 150 °C Storage temperature TSTG -55 to +150 °C Thermal resistance junction to ambient Company reserves the right to improve product design , functions and reliability without notice. REV:A Page 1 QW-J0006 Comchip Technology CO., LTD. Small Signal Switching Diodes Electrical Characteristics (at Ta=25°C unless otherwise noted) Parameter Conditions Symbol Min. 250 Reverse breakdown voltage IR = 100μA V(BR) Reverse voltage leakage current VR = 200V IR IF = 100mA Forward voltage V μA 0.1 1000 VF IF = 200mA Unit Max. mV 1250 Diode Capacitance VR=0V, f=1MHz CD 5 pF Reverse recovery time IF=IR=30mA, Irr=0.1xIR, RL=100Ω Trr 50 nS RATING AND CHARACTERISTIC CURVES (CDST-21/A/C/S-HF) Fig.1 - Forward characteristics Fig.2 - Reverse characteristics 1000 100 T A =100°C 10 Reverse current, (A) Forward current, (mA) 1000 T A =25°C 1 T A =100°C 100 10 T A =25°C 0.1 0.01 1 0 0.4 0.8 1.6 1.2 2.0 0 80 120 160 Forward voltage, (V) Reverse voltage, (V) Fig.3 - Capacitance between Fig.4 - Power derating curve 1.6 200 300 f=1MHz TA=25°C 1.4 Power daissipation, (mW) Capacitance between terminals, (pF) 40 1.2 1.0 0.8 250 200 150 100 50 0 0.6 0 4 8 12 16 20 Reverse voltage, (V) 0 25 50 75 100 125 150 Ambient temperature, (°C) Company reserves the right to improve product design , functions and reliability without notice. REV:A Page 2 QW-J0006 Comchip Technology CO., LTD. Small Signal Switching Diodes Reel Taping Specification P1 d T F E P0 B W C A P 12 o 0 D2 D1 D W1 SOT-23 SOT-23 SYMBOL A B C d D D1 D2 (mm) 3.15 ± 0.10 2.77 ± 0.10 1.22 ± 0.10 Φ1.50 ± 0.10 178 ± 2.00 54.40 ± 1.00 13.00 ± 1.00 (inch) 0.124 ± 0.004 0.109 ± 0.004 0.048 ± 0.004 Φ0.059 ± 0.004 7.008 ± 0.079 2.142 ± 0.039 0.512 ± 0.039 SYMBOL E F P P0 P1 W W1 (mm) 1.75 ± 0.10 3.50 ± 0.10 4.00 ± 0.10 4.00 ± 0.10 2.00 ± 0.10 8.00 + 0.30 /–0.10 12.30 ± 1.00 (inch) 0.069 ± 0.004 0.138 ± 0.004 0.157 ± 0.004 0.157 ± 0.004 0.079 ± 0.004 0.315 + 0.012 /–0.004 0.484 ± 0.039 Company reserves the right to improve product design , functions and reliability without notice. REV:A Page 3 QW-J0006 Comchip Technology CO., LTD. Small Signal Switching Diodes Marking Code 3 Marking Code Part Number CDST-21-HF .JS CDST-21A-HF .JS2 CDST-21C-HF .JS3 CDST-21S-HF .JS4 XXX 1 2 xx/xxx = Product type marking code Suggested PAD Layout SOT-23 SIZE (mm) (inch) A 0.80 0.031 B 1.90 0.075 C 2.02 0.080 D 2.82 0.111 A C D B Standard Packaging REEL PACK Case Type SOT-23 REEL Reel Size ( pcs ) (inch) 3,000 7 Company reserves the right to improve product design , functions and reliability without notice. REV:A Page 4 QW-J0006 Comchip Technology CO., LTD.