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| LOW-POWER HEX ECL-to-TTL TRANSLATOR FEATURES s Max. propagation delay of 3.7ns s IEE min. of -37mA s TTL outputs s Extended supply voltage option: VEE = -4.2V to -5.5V s 25% faster than National's 325 s Differential inputs with built-in offset s Voltage and temperature compensation for improved noise immunity s VBB output for single-ended use s Internal 75K input pull-down resistors s Function and pinout compatible with Fairchild F100K s Available in 24-pin CERPACK and 28-pin PLCC packages SY100S325 DESCRIPTION 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 75K 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. PIN CONFIGURATIONS VEES D5 Q3 Q4 Q5 D5 D4 25 24 23 22 21 20 19 VTTL VTTL VCC VCC VCC Q2 Q1 26 27 28 1 2 3 4 5 6 7 8 9 10 11 18 17 16 D4 D3 D3 VEES VEE VBB D2 BLOCK DIAGRAM VBB D0 D0 D1 D1 D2 D2 D3 D3 D4 D4 D5 D5 Q0 Top View PLCC J28-1 15 14 13 12 VEE VBB D4 D3 D0 VEES Q0 D0 D1 D1 D2 24 23 D3 22 21 20 19 18 17 Q1 D4 D5 D5 D2 1 2 3 4 5 6 7 8 9 10 11 12 D2 D1 D1 D0 D0 Q0 Q2 Q5 Q4 Q3 Top View Flatpack F24-1 16 15 14 13 Q3 VTTL VCC Q2 Q4 Q5 PIN NAMES Pin D0-D5 D0-D5 Q0-Q5 VEES VTTL VCCA Data Inputs Inverting Data Inputs Data Outputs VEE Substrate TTL VCC Power Supply VCCO for ECL Outputs Rev.: F Amendment: /0 Function 1 VTTL VCC Issue Date: July, 1999 Q1 Micrel SY100S325 DC ELECTRICAL CHARACTERISTICS VEE = -4.2V to -4.8V unless otherwise specified, VCC =VCCA = GND, VTTL = +4.5V to +5.5V Symbol VOH VOL VDIFF VCM IIH IIL IOS IEE ITTL VBB VIH VIL Parameter Output HIGH Voltage Output LOW Voltage Input Voltage Differential Common Mode Voltage Input HIGH Current Input LOW Current Output Short Circuit Current VEE Power Supply Current VTTL Power Supply Current Ouptut Reference Voltage Single-Ended Input HIGH Voltage Single-Ended Input LOW Voltage Min. 2.5 -- 150 -- -- 0.5 -150 -37 -- -1380 -1165 -1810 Typ. -- -- -- -- -- -- -80 -24 42 Max. -- 0.5 -- 1.0 350 -- -60 -17 65 Unit V V mV V A A mA mA mA mV mV mV IOH = -2.0mA IOL = 24mA Condition VIN = VIH (Max.) VIN = VIL (Min.) Required for Full Output Swing Permissible VCM with Respect to VBB VIN = VIH (Max.), D0-D5 = VBB, D0-D5 = VIL (Min.) VIN = VIH (Min.), D0-D5 = VBB VOUT = GND D0-D5 = VBB D0-D5 = VBB IVBB = -2.1mA Guaranteed HIGH Signal for All Inputs (with One Tied to VBB) Guaranteed LOW Signal for All Inputs (with One Tied to VBB) -1320 -1260 -- -- -880 -1475 AC ELECTRICAL CHARACTERISTICS PLCC/FLATPACK VEE = -4.2V to -5.5V unless otherwise specified, VCC = VCCA = GND, VTTL = +4.5V to +5.5V Symbol tPLH tPHL tPLH tPHL Parameter Propagation Delay Data to Output Propagation Delay Data to Output Min. 900 900 Typ. 2100 3100 Max. 2900 3700 Unit ps ps Condition CL = 15pF, Figure 2 CL = 50pF, Figure 2 2 Micrel SY100S325 SWITCHING WAVEFORM 0.7 0.1 ns INPUT 20% tPLH ATTENUATED OUTPUT Figure 1. Propagation Delay NOTE: VEE = -4.2V to -5.5V unless otherwise specified, VCC = VCCA = GND 0.7 0.1 ns 80% 50% -0.95V -1.69V tPHL 50% TEST CIRCUITS VTTL 0.1F VBB OPEN PULSE GENERATOR CL 450 L2 SCOPE CHAN B RT L1 SCOPE CHAN A RT VCC VEE Figure 2. AC Test Circuit for 15pF Loading NOTES: VCC = 0V, VEE = -4.5V, VTTL = +5V L1 and L2 = equal length 50 impedance lines RT = 50 terminator internal to scope Decoupling 0.1F from GND to VCC, VEE and VTTL All unused outputs are loaded with 500 to GND CL = Fixture and stray capacitance = 3pF PRODUCT ORDERING CODE Ordering Code SY100S325FC SY100S325JC SY100S325JCTR Package Type F24-1 J28-1 J28-1 Operating Range Commercial Commercial Commercial 3 Micrel SY100S325 24 LEAD CERPACK (F24-1) Rev. 03 4 Micrel SY100S325 28 LEAD PLCC (J28-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA FAX + 1 (408) 980-9191 + 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. (c) 2000 Micrel Incorporated 5 |
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