LOW-POWER HEX ECL-to-TTL TRANSLATOR SY100S325 DESCRIPTION FEATURES ■ Max. propagation delay of 3.7ns ■ IEE min. of –37mA ■ TTL outputs ■ Extended supply voltage option: VEE = –4.2V to –5.5V ■ 25% faster than National's 325 ■ Differential inputs with built-in offset ■ Voltage and temperature compensation for improved noise immunity ■ VBB output for single-ended use ■ Internal 75KΩ input pull-down resistors ■ Function and pinout compatible with Fairchild F100K ■ Available in 24-pin CERPACK and 28-pin PLCC packages The SY100S325 are hex translators for converting 100K ECL logic levels to TTL logic levels. Inputs can be used as inverting, non-inverting or differential receivers. An internal reference voltage generator provides VBB for single-ended operation or for use in Schmitt trigger applications. All inputs have 75KΩ pull-down resistors. The outputs will go LOW when the inputs are either open or have the same potential. When used in single-ended operation, the apparent input threshold of the true inputs is 20mV to 40mV higher (positive) than the threshold of the complementary inputs. The VTTL and VEE power may be applied in either order. D5 D4 VEES D5 Q3 Q4 Q5 PIN CONFIGURATIONS 25 24 23 22 21 20 19 26 18 D4 VTTL VCC VCC VCC 27 17 28 16 D3 D3 VEES VEE 13 4 12 D4 D5 D5 VBB 22 21 20 19 D2 D3 D3 VEE D4 23 1 18 D2 D5 2 17 D1 D5 3 16 D1 Q5 4 15 D0 Q4 5 14 D0 Q3 6 13 Q0 Q3 Q4 Q5 24 D4 Top View Flatpack F24-1 7 8 9 10 11 12 Q1 Q2 10 11 D2 Q0 D0 Q1 9 Q2 D4 8 VCC D3 Q0 7 VCC D3 6 VTTL D2 5 VBB D2 VTTL D2 14 3 VBB D1 D1 15 D1 D1 Q2 Q1 D0 D0 Top View PLCC J28-1 1 2 D0 VEES BLOCK DIAGRAM VTTL PIN NAMES Pin Function D0–D5 Data Inputs D0–D5 Inverting Data Inputs Q0–Q5 Data Outputs VEES VEE Substrate VTTL TTL VCC Power Supply VCCA VCCO for ECL Outputs Rev.: F 1 Amendment: /0 Issue Date: July, 1999 SY100S325 Micrel DC ELECTRICAL CHARACTERISTICS VEE = –4.2V to –4.8V unless otherwise specified, VCC =VCCA = GND, VTTL = +4.5V to +5.5V Symbol Parameter Min. Typ. Max. Unit Condition VOH Output HIGH Voltage 2.5 — — V IOH = –2.0mA VIN = VIH (Max.) VOL Output LOW Voltage — — 0.5 V IOL = 24mA VIN = VIL (Min.) VDIFF Input Voltage Differential 150 — — mV VCM Common Mode Voltage — — 1.0 V Permissible ±VCM with Respect to VBB IIH Input HIGH Current — — 350 µA VIN = VIH (Max.), D0–D5 = VBB, D0–D5 = VIL (Min.) IIL Input LOW Current 0.5 — — µA VIN = VIH (Min.), D0–D5 = VBB IOS Output Short Circuit Current –150 –80 –60 mA VOUT = GND IEE VEE Power Supply Current –37 –24 –17 mA D0–D5 = VBB ITTL VTTL Power Supply Current — 42 65 mA D0–D5 = VBB VBB Ouptut Reference Voltage –1380 mV IVBB = –2.1mA VIH Single-Ended Input HIGH Voltage –1165 — –880 mV Guaranteed HIGH Signal for All Inputs (with One Tied to VBB) VIL Single-Ended Input LOW Voltage –1810 — –1475 mV Guaranteed LOW Signal for All Inputs (with One Tied to VBB) –1320 –1260 Required for Full Output Swing AC ELECTRICAL CHARACTERISTICS PLCC/FLATPACK VEE = –4.2V to –5.5V unless otherwise specified, VCC = VCCA = GND, VTTL = +4.5V to +5.5V Symbol Parameter Min. Typ. Max. Unit tPLH tPHL Propagation Delay Data to Output 900 2100 2900 ps CL = 15pF, Figure 2 tPLH tPHL Propagation Delay Data to Output 900 3100 3700 ps CL = 50pF, Figure 2 2 Condition SY100S325 Micrel SWITCHING WAVEFORM 0.7 ± 0.1 ns 0.7 ± 0.1 ns –0.95V 80% 50% INPUT 20% –1.69V tPLH tPHL ATTENUATED OUTPUT 50% Figure 1. Propagation Delay NOTE: VEE = –4.2V to –5.5V unless otherwise specified, VCC = VCCA = GND TEST CIRCUITS VTTL VBB 0.1µF OPEN 450Ω PULSE GENERATOR L2 CL SCOPE CHAN B RT VCC VEE L1 SCOPE CHAN A RT Figure 2. AC Test Circuit for 15pF Loading NOTES: VCC = 0V, VEE = –4.5V, VTTL = +5V L1 and L2 = equal length 50Ω impedance lines RT = 50Ω terminator internal to scope Decoupling 0.1µF from GND to VCC, VEE and VTTL All unused outputs are loaded with 500Ω to GND CL = Fixture and stray capacitance = 3pF PRODUCT ORDERING CODE Ordering Code 3 Package Type Operating Range SY100S325FC F24-1 Commercial SY100S325JC J28-1 Commercial SY100S325JCTR J28-1 Commercial SY100S325 Micrel 24 LEAD CERPACK (F24-1) Rev. 03 4 SY100S325 Micrel 28 LEAD PLCC (J28-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA + 1 (408) 980-9191 FAX + 1 (408) 914-7878 WEB http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. © 2000 Micrel Incorporated 5