LOW POWER HEX TTL-to-ECL TRANSLATOR FEATURES The SY100S324 is a hex translator designed to convert TTL logic levels to 100K ECL levels. The inputs are TTL compatible with differential outputs that can either be used as an inverting/non-inverting translator or as differential line drivers. A common Enable (E), when LOW, holds all inverting outputs HIGH and holds all noninverting outputs LOW. When used in the differential mode, due to its high common mode rejection, it overcomes voltage gradients between the TTL and ECL ground systems. The VEE and VTTL power may be applied in either order. Q0 VEES Q0 D2 D1 PIN CONFIGURATIONS 25 24 23 22 21 20 19 17 28 16 Top View PLCC J28-1 13 4 12 Q3 Q3 D4 Q4 Q4 D5 Q5 Q5 23 22 21 20 19 D4 24 D3 10 11 D1 1 18 D5 D2 2 17 Q5 Q0 3 16 Q5 Q0 4 15 Q4 Q1 5 14 Q4 Q1 6 13 Q3 Top View Flatpack F24-1 7 8 9 10 11 12 Q3 Q2 Q2 9 VCCA D3 8 Q2 D2 7 E Q1 Q1 6 VEE D1 14 3 VTTL Q0 Q0 15 VCCA 2 Q2 1 5 D0 D0 VTTL E VEES VEE D3 D4 VCC E 18 27 Q4 BLOCK DIAGRAM 26 D0 Q2 Q2 VCC VCC VCCA VCCA Q3 VEES Q5 Q5 D5 ■ ■ ■ ■ Max. propagation delay of 1.4ns IEE min. of –70mA Industry standard 100K ECL levels Extended supply voltage option: VEE = –4.2V to –5.5V Differential outputs Voltage and temperature compensation for improved noise immunity Internal 75KΩ input pull-down resistors Twice as fast as Fairchild’s 324 Function and pinout compatible with Fairchild F100K Available in 24-pin CERPACK and 28-pin PLCC packages Q1 Q1 ■ ■ DESCRIPTION Q3 Q4 ■ ■ ■ ■ SY100S324 PIN NAMES Pin Function D0–D5 Data Inputs E Enable Inputs Q0–Q5 Data Outputs Q0–Q5 Complementary Data Outputs VEES VEE Substrate VTTL TTL VCC Power Supply VCCA VCCO for ECL Outputs Rev.: F 1 Amendment: /0 Issue Date: July, 1999 SY100S324 Micrel DC ELECTRICAL CHARACTERISTICS VEE = –4.2V to –5.5V unless otherwise specified, VCC = VCCA = GND, VTTL = +4.5V to +5.5V Symbol Parameter Min. Sim. Max. Unit Condition VOH Output HIGH Voltage –1025 –986 –880 mV VIN = VIH (Max.) VOL Output LOW Voltage –1810 –1674 –1620 mV VIN = VIL (Min.) Loading with 50Ω VOHC Output HIGH Voltage –1035 — — mV VIN = VIH (Min.) VOLC Output LOW Voltage — — –1610 mV VIN = VIL (Max.) VIH Input HIGH Voltage 2.0 — 5.0 V Guaranteed HIGH Signal for All Inputs VIL Input LOW Voltage 0 — 0.8 V Guaranteed LOW Signal for All Inputs VCD Input Clamp Diode Voltage — — –1.5 V IIN = –10mA IIH Input HIGH Current Data Enable — — — — 20 120 µA VIN = +2.4V All Other Inputs VIN = GND — — 1.0 mA VIN = +5.5V, VTTL = Max., All Other Inputs VIN = GND Loading with 50Ω to –2V IIH Input HIGH Current Breakdown Test, All Inputs IIL Input LOW Current Data Enable –1.2 –6.7 — — — — mA VIN = +0.4V All Other Inputs VIN = VIH IEE VEE Power Supply Current –70 –45 –28 mA All Inputs VIN = +4.0V ITTL VTTL Power Supply Current — 25 35 mA All Inputs VIN = GND 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 and Enable to Output 400 850 1400 ps tTLH tTHL Transition Time 20% to 80%, 80% to 20% 350 — 1700 ps 2 Condition See Switching Wave Form Figures SY100S324 Micrel SWITCHING WAVEFORM 2.5 ± 0.3 ns 2.5 ± 0.3 ns +3.0V 80% 50% INPUT +1.5V 20% 0V tPHL tPLH COMPLEMENT 50% tPLH tPHL 80% 50% 20% TRUE tTLH tTHL Figure 1. Propagation Delay and Transition Times NOTE: VEE = –4.2V to –5.5V unless otherwise specified, VCC = VCCA = GND, VTTL = +4.5V to +5.5V TEST CIRCUIT VIH VTTL 0.1µF 0.1µF L1 0.1µF L2 SCOPE CHAN A SCOPE CHAN B RT RT L3 PULSE GENERATOR 0.1µF 2.5µF VEE VCC Figure 2. AC Test Circuit PRODUCT ORDERING CODE NOTES: VCC, VCCA = +2V, VEE = –2.5V, VTTL = +7.0V, VIH = +6.0V L1, L2 and L3 = 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 50Ω to GND CL = Fixture and stray capacitance ≤ 3pF 3 Ordering Code Package Type Operating Range SY100S324FC F24-1 Commercial SY100S324JC J28-1 Commercial SY100S324JCTR J28-1 Commercial SY100S324 Micrel 24 LEAD CERPACK (F24-1) Rev. 03 4 SY100S324 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