LS121 MONOLITHIC DUAL NPN TRANSISTOR Linear Systems replaces discontinued Intersil IT121 The LS121 is a monolithic pair of NPN transistors mounted in a single TO-78 package. The monolithic dual chip design reduces parasitics and gives better performance while ensuring extremely tight matching. The LS121 is a direct replacement for discontinued Intersil IT121. The hermetically sealed TO-78 is well suited for hi-rel and harsh environment applications. (See Packaging Information). LS121 Features: High hfe at low current Tight matching Tight VBE tracking Low Output Capacitance FEATURES Direct Replacement for INTERSIL IT121 HIGH hFE @ LOW CURRENT OUTPUT CAPACITANCE VBE tracking ABSOLUTE MAXIMUM RATINGS 1 @ 25°C (unless otherwise noted) ≥ 80 @ 10µA ≤ 2.0pF ≤ 10µV°C Maximum Temperatures Storage Temperature Operating Junction Temperature Maximum Power Dissipation Continuous Power Dissipation (One side) Continuous Power Dissipation (Both sides) Linear Derating factor (One side) Linear Derating factor (Both sides) Maximum Currents Collector Current MATCHING CHARACTERISTICS @ 25°C (unless otherwise stated) SYMBOL CHARACTERISTIC |VBE1 – VBE2 | Base Emitter Voltage Differential ∆|(VBE1 – VBE2)| / ∆T Base Emitter Voltage Differential Change with Temperature |IB1 – IB2 | Base Current Differential ‐65°C to +200°C ‐55°C to +150°C 250mW 500mW 2.3mW/°C 4.3mW/°C 10mA MIN ‐‐ ‐‐ TYP ‐‐ ‐‐ MAX 3 10 UNITS mV µV/°C ‐‐ ‐‐ 25 nA CONDITIONS IC = 10µA, VCE = 5V IC = 10µA, VCE = 5V TA = ‐55°C to +125°C IC = 10µA, VCE = 5V Click To Buy ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted) SYMBOL CHARACTERISTICS MIN. BVCBO Collector to Base Voltage 45 BVCEO Collector to Emitter Voltage 45 BVEBO Emitter‐Base Breakdown Voltage 6.2 BVCCO Collector to Collector Voltage 60 hFE DC Current Gain 80 100 VCE(SAT) Collector Saturation Voltage ‐‐ IEBO Emitter Cutoff Current ‐‐ ICBO Collector Cutoff Current ‐‐ COBO Output Capacitance ‐‐ CC1C2 Collector to Collector Capacitance ‐‐ IC1C2 Collector to Collector Leakage Current ‐‐ fT Current Gain Bandwidth Product 180 NF Narrow Band Noise Figure ‐‐ TYP. ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ MAX. ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 0.5 1 1 2 2 10 ‐‐ 3 UNITS V V V V V nA nA pF pF nA MHz dB CONDITIONS IC = 10µA, IE = 0 IC = 10µA, IB = 0 IE = 10µA, IC = 02 IC = 10µA, IE = 0 IC = 10µA, VCE = 5V IC = 1.0mA, VCE = 5V IC = 0.5mA, IB = 0.05mA IC = 0, VEB = 3V IE = 0, VCB = 45V IE = 0, VCB = 5V VCC = 0V VCC = ±60V IC = 1mA, VCE = 5V IC = 100µA, VCE = 5V, BW=200Hz, RG= 10KΩ, f = 1KHz Notes: 1. Absolute Maximum ratings are limiting values above which serviceability may be impaired 2. The reverse base‐to‐emitter voltage must never exceed 6.2 volts; the reverse base‐to‐emitter current must never exceed 10µA. Available Packages: TO-78 (Bottom View) LS121 in TO-78 LS121 available as bare die Please contact Micross for full package and die dimensions: Email: [email protected] Web: www.micross.com/distribution.aspx Information furnished by Linear Integrated Systems and Micross Components is believed to be accurate and reliable. However, no responsibility is assumed for its use; nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Linear Integrated Systems.