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| 8-INPUT PECL DIFFERENTIAL MUX WITH TTL SELECTS FEATURES s Low skew s Differential PECL inputs s Differential cut-off PECL outputs capable of driving 25 load for driving data bus s Tri-state TTL output s TTL select and enable input s Internal 75K PECL input pull-down resistors s PECL I/O fully compatible with industry standard s Available in 28-pin PLCC package SY100S863 DESCRIPTION The SY100S863 is a PECL 8:1 multiplexer designed for use in new, high-performance PECL systems. It has differential PECL outputs and a standard TTL output. The TTL select inputs (SEL0, SEL1, SEL2) determine which one of the eight differential PECL data inputs (D0-D7) is propagated to the outputs. The enable pin, EN, is provided for expansion. When EN is at a TTL logic one level, both PECL and TTL outputs are enabled. When the enable pin is set to TTL logic zero level, both PECL outputs of the differential pair are in cut-off and the TTL output is in a three-state condition. BLOCK DIAGRAM D0 D0 D1 D1 D2 D2 D3 D3 D4 D4 D5 D5 D6 D6 D7 D7 (4) (5) (6) (7) (8) (9) (10) (11) (27) (26) (25) (24) (23) (22) (21) (20) EN (15) PIN CONFIGURATION D7 VCCO D5 D5 D6 25 24 23 22 21 20 19 D4 D6 D7 26 27 28 1 2 3 4 5 6 7 8 9 10 11 18 17 16 Q Q VCC EN VCCT QTTL VGT 8 DIFFERENTIAL PECL INPUTS (17) Q (18) Q 8:1 MUX (13) QTTL D4 SEL0 VEE SEL1 SEL2 D0 TOP VIEW PLCC J28-1 15 14 13 12 D0 D1 D1 D2 D2 D3 SEL0 (28) SEL1 (2) SEL2 (3) PIN NAMES Pin D0, /D0 - D7, /D7 Q, /Q QTTL EN SEL0,1,2 Function Differential PECL Input Pairs Differential PECL Outputs TTL Output Enable Input Select Inputs TTL INPUTS D3 Rev.: E Amendment: /0 1 Issue Date: May 2000 Micrel SY100S863 TRUTH TABLE EN H H H H H H H H L SEL2 L L L L H H H H X SEL1 L L H H L L H H X SEL0 L H L H L H L H X Q D0 D1 D2 D3 D4 D5 D6 D7 Z QTTL D0 D1 D2 D3 D4 D5 D6 D7 Z PECL DC ELECTRICAL CHARACTERISTICS VCC = VCCO = VCCT = 5.0V 5%; VEE = VGT = GND Symbol VOH VOL VOZ VIH VIL IIH IIL ICC Parameter Output HIGH Voltage Output LOW Voltage Cutoff Voltage(1) Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current VCC Supply Current (1) Min. 3.975 3.17 -- 3.835 3.17 -- 0.50 -- Typ. 4.045 3.295 3 -- -- -- -- 73 Max. 4.13 3.38 3.10 4.13 3.525 350 -- 88 Unit V V V V V A A mA Condition Loading with 25 to 3V (VCC-2V) Loading with 25 to 3V (VCC-2V) Loading with 25 to 3V (VCC-2V) (1) VIN = VIH (Max.) VIN = VIL (Min.) NOTE: 1. Levels shown are for VCCO = 5.0V and will vary 1:1 with powers. TTL DC ELECTRICAL CHARACTERISTICS VCC = VCCO = VCCT = 5.0V 5%; VEE = VGT = GND Symbol VOH VOL VIH VIL IIH IIL VIK IOS IOZHT IOZLT Parameter Output HIGH Voltage Output LOW Voltage Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current Input Clamp Voltage Output Short Circuit Current Tri-state Current Output HIGH Tri-state Current Output LOW Min. 2.4 -- 2.0 0 -- -0.7 -1.2 -200 -- -700 Typ. 2.9 0.3 -- -- -- -- -- -- -- -- Max. -- 0.5 VCC 0.8 1.0 -- -- -60 70 -- Unit V V V V mA mA V mA A A VIN = 2.7V VIN = 0.5V IIN = -18mA VOUT = 0V, VCCT = 5.5V VOUT = 2.7V VOUT = 0.5V Condition IOH = -3mA IOL = 24mA 2 Micrel SY100S863 PECL AC ELECTRICAL CHARACTERISTICS VCC = VCCO = +5.0V 5%; VEE = VGT = GND TA = 0C Symbol tPLH tPHL Parameter Propagation D to Q SEL0 to Q SEL1 to Q SEL2 to Q Delay(1),(2) 500 300 300 300 300 -- 300 -- -- -- -- -- 1300 400 900 2000 1750 1500 1750 300 600 500 300 300 300 300 -- 300 -- -- -- -- -- 1300 400 900 2000 1750 1500 1750 300 600 500 300 300 300 300 -- 300 -- -- -- -- -- 1300 400 600 ps 900 2000 1750 1500 1750 ps Min. Typ. Max. TA = +25C Min. Typ. Max. TA = +85C Min. Typ. Max. Unit ps Condition tPZH tPHZ tr tf EN to Q(3) (Cutoff to HIGH) EN to Q(3)300 (HIGH to Cutoff) Output Rise/Fall Times(2) 20% to 80% NOTES: 1. Part-to-part skew is defined as Max. - Min. value at the given temperature. 2. RL = 50 3. Figures 1 and 2 TTL AC ELECTRICAL CHARACTERISTICS VCC = VCCO = 5V 5%; VEE = VGT = GND TA = 0C Symbol tPLH tPHL Parameter Propagation Delay(1)(2) D to QTTL SEL0 to QTTL SEL1 to QTTL SEL2 to QTTL EN to TTL Output(2) (Enable Time) EN to TTL Output(2) (Disable Time) Output Rise/Fall Time(3) 0.8V to 2.4V 0.8Vto 2.0V Min. 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 0.3 Typ. -- -- -- -- -- -- -- -- -- Max. 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 1.6 TA = +25C Min. 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 0.3 Typ. -- -- -- -- -- -- -- -- -- Max. 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 1.6 TA = +85C Min. 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 0.3 Typ. -- -- -- -- -- -- -- -- -- Max. 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 1.6 ns ns ns Unit ns Condition tPZH tPZL tPHZ tPLZ tr tf NOTES: 1. Part-to-part skew is defined as Max. - Min. value at the given temperature. 2. Figures 3 and 4 3. CL = 25pF 3 Micrel SY100S863 PECL-TO-PECL TEST CIRCUITRY VCC, VCCT & VCCO 2V -3V PULSE GENERATOR 0.1 0.1 VEE, VGT D Q 50 DUT Q QTTL EN CH C STTL RT 50 450 FTTL 0V -3V USE OSCILLOSCOPE INTERNAL 50 LOAD FOR TERMINATION. CH A OSCILLOSCOPE CH B Figure 1. PECL-to-PECL AC Test Circuit PECL-TO-PECL SWITCHING WAVEFORMS PECL DATA ENABLE VOH = 4.1V PECL OUTPUT tPD VOL = 3.3V tPHZ VOZ = 3V tPZH Figure 2. PECL-to-PECL Transition -- Propagation Delay and Transition Times 4 Micrel SY100S863 PECL-TO-TTL TEST CIRCUITRY VCC, VCCT & VCCO 5V 0.1 VEE, VGT PULSE GENERATOR D Q 7V LZ/ZL Three-State Pull-up DUT Q QTTL EN CH C STTL RT 50 450 500 450 50pF FTTL -3V 0V USE OSCILLOSCOPE INTERNAL 50 LOAD FOR TERMINATION. CH A OSCILLOSCOPE CH B Figure 3. PECL-to-TTL AC Test Circuit 5 Micrel SY100S863 PECL-TO-TTL SWITCHING WAVEFORMS 3V 1.5V PECL DATA 0V 1.5V 1.5V TTL OUTPUT tPLH tPHL 1.5V Figure 4a. PECL-to-TTL Transition, Data to TTL Output Delay 3V EN 1.5V 0V tPZH 1.5V TTL OUTPUT TTL OUTPUT 1.5V tPZL Figure 4b. EN to TTL Output Enable and Disable Times 1.5V tPHZ 0.3V VOH 0V 3.5V tPLZ 0.3V VOL PRODUCT ORDERING CODE Ordering Code SY100S863JC SY100S863JCTR Package Type J28-1 J28-1 Operating Range Commercial Commercial 6 Micrel SY100S863 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 7 |
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