MC10EP016, MC100EP016 3.3V / 5VECL 8−Bit Synchronous Binary Up Counter The MC10/100EP016 is a high−speed synchronous, presettable, cascadeable 8−bit binary counter. Architecture and operation are the same as the MC10E016 in the ECLinPS™ family. The counter features internal feedback to TC gated by the TCLD (Terminal Count Load) pin. When TCLD is LOW (or left open, in which case it is pulled LOW by the internal pulldowns), the TC feedback is disabled, and counting proceeds continuously, with TC going LOW to indicate an all−one state. When TCLD is HIGH, the TC feedback causes the counter to automatically reload upon TC = LOW, thus functioning as a programmable counter. The Qn outputs do not need to be terminated for the count function to operate properly. To minimize noise and power, unused Q outputs should be left unterminated. COUT and COUT provide differential outputs from a single, non−cascaded counter or divider application. COUT and COUT should not be used in cascade configuration. Only TC should be used for a counter or divider cascade chain output. A differential clock input has also been added to improve performance. The 100 Series contains temperature compensation. • 500 ps Typical Propagation Delay • PECL Mode Operating Range: VCC = 3.0 V to 5.5 V with VEE = 0 V • NECL Mode Operating Range: VCC = 0 V with VEE = −3.0 V to −5.5 V • Open Input Default State • Safety Clamp on Inputs • Internal TC Feedback (Gated) • Addition of COUT and COUT • 8−Bit • Differential Clock Input • VBB Output • Fully Synchronous Counting and TC Generation • Asynchronous Master Reset • Pb−Free Packages are Available* http://onsemi.com MARKING DIAGRAM* MCxxx EP016 AWLYYWWG LQFP−32 FA SUFFIX CASE 873A xxx A WL YY WW G = 10 or 100 = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package *For additional marking information, refer to Application Note AND8002/D. ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 12 of this data sheet. *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. © Semiconductor Components Industries, LLC, 2006 January, 2006 − Rev. 11 1 Publication Order Number: MC10EP016/D MC10EP016, MC100EP016 VBB CLK CLK P0 24 23 22 21 P1 P2 P3 P4 20 19 18 17 Table 1. PIN DESCRIPTION PIN FUNCTION P0−P7* ECL Parallel Data (Preset) Inputs PE 25 16 P5 CE 26 15 P6 Q0−Q7 ECL Data Outputs MR 27 14 P7 CE* ECL Count Enable Control Input VEE 28 13 VCC PE* ECL Parallel Load Enable Control Input Q0 29 12 TC Q1 30 11 COUT Q2 31 10 VCC 32 9 MC10EP016 MC100EP016 1 2 3 4 5 6 7 MR* ECL Master Reset CLK*, CLK* ECL Differential Clock TC ECL Terminal Count Output TCLD* COUT COUT, COUT VEE 8 ECL TC−Load Control Input ECL Differential Output VCC Positive Supply VEE Negative Supply VBB Reference Voltage Output * Pins will default LOW when left open. VCC Q3 Q4 Q5 Q6 Q7 TCLD VCC Warning: All VCC and VEE pins must be externally connected to Power Supply to guarantee proper operation. Figure 1. 32−Lead LQFP Pinout (Top View) Table 2. FUNCTION TABLES CE PE X L L H X X L H H H X X TCLD MR X L H X X X CLK L L L L L H FUNCTION Z Z Z Z ZZ X Load Parallel (Pn to Qn) Continuous Count Count; Load Parallel on TC = LOW Hold Masters Respond, Slaves Hold Reset (Qn : = LOW, TC : = HIGH) ZZ = Clock Pulse (High−to−Low) Z = Clock Pulse (Low−to−High) Table 3. FUNCTION TABLE Function PE CE MR TCLD CLK P7−P4 P3 P2 P1 P0 Q7−Q4 Q3 Q2 Q1 Q0 TC COUT COUT Load Count L H H H H X L L L L L L L L L X L L L L Z Z Z Z Z H X X X X H X X X X H X X X X L X X X X L X X X X H H H H L H H H H L H H H H L L L H H L L H L H L H H H L H H H H L H L L L H L Load Hold L H H X H H L L L X X X Z Z Z H X X H X X H X X L X X L X X H H H H H H H H H L L L L L L H H H H H H L L L Load on Terminal Count H H H H H H L L L L L L L L L L L L H H H H H H Z Z Z Z Z Z H H H H H H L L L L L L H H H H H H H H H H H H L L L L L L H H H H H H H H H L L H H H H H H L L H H H H L H L H L H L H H L H H H H H L H H H L L H L L L Reset X X H X X X X X X X L L L L L H H L http://onsemi.com 2 MC10EP016, MC100EP016 Q1 Q0 Q7 PE TCLD Q0M MASTER Q0M SLAVE CE Q0 CE CE Q Q1 0 Q2 Q3 Q Q5 Q4 BIT 1 BIT 0 BIT 7 6 P0 P1 P7 MR CLK BITS 2−6 CLK TC 5 VBB COUT COUT VEE Note that this diagram is provided for understanding of logic operation only. It should not be used for propagation delays as many gate functions are achieved internally without incurring a full gate delay. Figure 2. 8-BIT Binary Counter Logic Diagram Table 4. ATTRIBUTES Characteristics Value Internal Input Pulldown Resistor 75 kW Internal Input Pullup Resistor ESD Protection N/A Human Body Model Machine Model Charged Device Model Moisture Sensitivity, Indefinite Time Out of Drypack (Note 1) LQFP−32 Flammability Rating Oxygen Index: 28 to 34 Transistor Count > 2 kV > 100 V > 2 kV Pb Pkg Pb−Free Pkg Level 2 Level 2 UL 94 V−0 @ 0.125 in 897 Devices Meets or exceeds JEDEC Spec EIA/JESD78 IC Latchup Test 1. For additional information, see Application Note AND8003/D. http://onsemi.com 3 MC10EP016, MC100EP016 Table 5. MAXIMUM RATINGS) Rating Unit VCC PECL Mode Power Supply Parameter VEE = 0 V 6 V VEE NECL Mode Power Supply VCC = 0 V −6 V VI PECL Mode Input Voltage NECL Mode Input Voltage VEE = 0 V VCC = 0 V 6 −6 V V Iout Output Current Continuous Surge 50 100 mA mA IBB VBB Sink/Source ± 0.5 mA TA Operating Temperature Range −40 to +85 °C Tstg Storage Temperature Range −65 to +150 °C qJA Thermal Resistance (Junction−to−Ambient) 0 lfpm 500 lfpm 32 LQFP 32 LQFP 80 55 °C/W °C/W qJC Thermal Resistance (Junction−to−Case) Standard Board 32 LQFP 12 to 17 °C/W Tsol Wave Solder 265 265 °C Symbol Condition 1 Condition 2 VI VCC VI VEE Pb Pb−Free Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. Table 6. 10EP DC CHARACTERISTICS, PECL VCC = 3.3 V, VEE = 0 V (Note 2) −40°C Symbol Characteristic Min Typ 25°C Max Min Typ 85°C Max Min Typ Max Unit IEE Power Supply Current 120 160 200 120 160 200 120 160 200 mA VOH Output HIGH Voltage (Note 3) 2165 2290 2415 2230 2355 2480 2290 2415 2540 mV VOL Output LOW Voltage (Note 3) 1365 1490 1615 1430 1555 1680 1490 1615 1740 mV VIH Input HIGH Voltage (Single−Ended) 2090 2415 2155 2480 2215 2540 mV VIL Input LOW Voltage (Single−Ended) 1365 1690 1460 1755 1490 1815 mV VBB Output Voltage Reference 1790 1990 1855 2055 1915 2115 mV VIHCMR Input HIGH Voltage Common Mode Range (Differential Configuration) (Note 4) 3.3 2.0 3.3 2.0 3.3 V IIH Input HIGH Current 150 mA IIL Input LOW Current 1890 2.0 150 0.5 1955 150 0.5 0.5 2015 mA NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are applied individually under normal operating conditions and not valid simultaneously. 2. Input and output parameters vary 1:1 with VCC. VEE can vary +0.3 V to −2.2 V. 3. All loading with 50 W to VCC − 2.0 V. 4. VIHCMR min varies 1:1 with VEE, VIHCMR max varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential input signal. http://onsemi.com 4 MC10EP016, MC100EP016 Table 7. 10EP DC CHARACTERISTICS, PECL VCC = 5.0 V, VEE = 0 V (Note 5) −40°C Symbol Characteristic 25°C 85°C Min Typ Max Min Typ Max Min Typ Max Unit IEE Power Supply Current (Note 6) 120 160 200 120 160 200 120 160 200 mA VOH Output HIGH Voltage (Note 7) 3865 3990 4115 3930 4055 4180 3990 4115 4240 mV VOL Output LOW Voltage (Note 7) 3065 3190 3315 3130 3255 3380 3190 3315 3440 mV VIH Input HIGH Voltage (Single−Ended) 3790 4115 3855 4180 3915 4240 mV VIL Input LOW Voltage (Single−Ended) 3065 3390 3130 3455 3190 3515 mV VBB Output Voltage Reference 3490 3690 3555 3755 3615 3815 mV VIHCMR Input HIGH Voltage Common Mode Range (Differential Configuration) (Note 8) 5.0 2.0 5.0 2.0 5.0 V IIH Input HIGH Current 150 mA IIL Input LOW Current 3590 2.0 3655 150 3715 150 0.5 0.5 0.5 mA NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are applied individually under normal operating conditions and not valid simultaneously. 5. Input and output parameters vary 1:1 with VCC. VEE can vary +2.0 V to −0.5 V. 6. Required 500 lfpm air flow when using +5 V power supply. For (VCC − VEE) >3.3 V, 5 W to 10 W in line with VEE required for maximum thermal protection at elevated temperatures. Recommend VCC−VEE operation at 3.3 V. 7. All loading with 50 W to VCC − 2.0 V. 8. VIHCMR min varies 1:1 with VEE, VIHCMR max varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential input signal. Table 8. 10EP DC CHARACTERISTICS, NECL VCC = 0 V, VEE = −5.5 V to −3.0 V (Note 9) −40°C Symbol Characteristic 25°C 85°C Min Typ Max Min Typ Max Min Typ Max Unit 120 160 200 120 160 200 120 160 200 mA IEE Power Supply Current (Note 10) VOH Output HIGH Voltage (Note 11) −1135 −1010 −885 −1070 −945 −820 −1010 −885 −760 mV VOL Output LOW Voltage (Note 11) −1935 −1810 −1685 −1870 −1745 −1620 −1810 −1685 −1560 mV VIH Input HIGH Voltage (Single−Ended) −1210 −885 −1145 −820 −1085 −760 mV VIL Input LOW Voltage (Single−Ended) −1935 −1610 −1870 −1545 −1810 −1485 mV VBB Output Voltage Reference −1510 −1310 −1445 −1245 −1385 −1185 mV VIHCMR Input HIGH Voltage Common Mode Range (Differential Configuration) (Note 12) 0.0 V IIH Input HIGH Current 150 mA IIL Input LOW Current −1410 VEE+2.0 0.0 VEE+2.0 150 0.5 −1345 0.0 VEE+2.0 150 0.5 −1285 0.5 mA NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are applied individually under normal operating conditions and not valid simultaneously. 9. Input and output parameters vary 1:1 with VCC. 10. Required 500 lfpm air flow when using −5 V power supply. For (VCC − VEE) >3.3 V, 5 W to 10 W in line with VEE required for maximum thermal protection at elevated temperatures. Recommend VCC−VEE operation at 3.3 V. 11. All loading with 50 W to VCC − 2.0 V. 12. VIHCMR min varies 1:1 with VEE, VIHCMR max varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential input signal. http://onsemi.com 5 MC10EP016, MC100EP016 Table 9. 100EP DC CHARACTERISTICS, PECL VCC = 3.3 V, VEE = 0 V (Note 13) −40°C Symbol Characteristic 25°C 85°C Min Typ Max Min Typ Max Min Typ Max Unit IEE Power Supply Current 120 160 200 120 160 200 120 160 200 mA VOH Output HIGH Voltage (Note 14) 2155 2280 2405 2155 2280 2405 2155 2280 2405 mV VOL Output LOW Voltage (Note 14) 1355 1480 1605 1355 1480 1605 1355 1480 1605 mV VIH Input HIGH Voltage (Single−Ended) 2075 2420 2075 2420 2075 2420 mV VIL Input LOW Voltage (Single−Ended) 1355 1675 1355 1675 1355 1675 mV VBB Output Voltage Reference 1775 1975 1775 1975 1775 1975 mV VIHCMR Input HIGH Voltage Common Mode Range (Differential Configuration) (Note 15) 3.3 2.0 3.3 2.0 3.3 V IIH Input HIGH Current 150 mA IIL Input LOW Current 1875 2.0 1875 150 0.5 1875 150 0.5 0.5 mA NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are applied individually under normal operating conditions and not valid simultaneously. 13. Input and output parameters vary 1:1 with VCC. VEE can vary +0.3 V to −2.2 V. 14. All loading with 50 W to VCC − 2.0 V. 15. VIHCMR min varies 1:1 with VEE, VIHCMR max varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential input signal. Table 10. 100EP DC CHARACTERISTICS, PECL VCC = 5.0 V, VEE = 0 V (Note 16) −40°C Symbol Characteristic 25°C 85°C Min Typ Max Min Typ Max Min Typ Max Unit IEE Power Supply Current (Note 17) 120 160 200 120 160 200 120 160 200 mA VOH Output HIGH Voltage (Note 18) 3855 3980 4105 3855 3980 4105 3855 3980 4105 mV VOL Output LOW Voltage (Note 18) 3055 3180 3305 3055 3180 3305 3055 3180 3305 mV VIH Input HIGH Voltage (Single−Ended) 3775 4120 3775 4120 3775 4120 mV VIL Input LOW Voltage (Single−Ended) 3055 3375 3055 3375 3055 3375 mV VBB Output Voltage Reference 3475 3675 3475 3675 3475 3675 mV VIHCMR Input HIGH Voltage Common Mode Range (Differential Configuration) (Note 19) 5.0 2.0 5.0 2.0 5.0 V IIH Input HIGH Current 150 mA IIL Input LOW Current 3575 2.0 150 0.5 3575 150 0.5 0.5 3575 mA NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are applied individually under normal operating conditions and not valid simultaneously. 16. Input and output parameters vary 1:1 with VCC. VEE can vary +2.0 V to −0.5 V. 17. Required 500 lfpm air flow when using +5 V power supply. For (VCC − VEE) >3.3 V, 5 W to 10 W in line with VEE required for maximum thermal protection at elevated temperatures. Recommend VCC−VEE operation at 3.3 V. 18. All loading with 50 W to VCC − 2.0 V. 19. VIHCMR min varies 1:1 with VEE, VIHCMR max varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential input signal. http://onsemi.com 6 MC10EP016, MC100EP016 Table 11. 100EP DC CHARACTERISTICS, NECL VCC = 0 V, VEE = −5.5 V to −3.0 V (Note 20) −40°C Symbol Characteristic 25°C 85°C Min Typ Max Min Typ Max Min Typ Max Unit IEE Power Supply Current (Note 21) 120 160 200 120 160 200 120 160 200 mA VOH Output HIGH Voltage (Note 22) −1145 −1020 −895 −1145 −1020 −895 −1145 −1020 −895 mV VOL Output LOW Voltage (Note 22) −1945 −1820 −1695 −1945 −1820 −1695 −1945 −1820 −1695 mV VIH Input HIGH Voltage (Single−Ended) −1225 −880 −1225 −880 −1225 −880 mV VIL Input LOW Voltage (Single−Ended) −1945 −1625 −1945 −1625 −1945 −1625 mV VBB Output Voltage Reference −1525 −1325 −1525 −1325 −1525 −1325 mV VIHCMR Input HIGH Voltage Common Mode Range (Differential Configuration) (Note 23) 0.0 V IIH Input HIGH Current 150 mA IIL Input LOW Current −1425 VEE+2.0 0.0 VEE+2.0 150 0.5 −1425 0.0 VEE+2.0 150 0.5 −1425 0.5 mA NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are applied individually under normal operating conditions and not valid simultaneously. 20. Input and output parameters vary 1:1 with VCC. 21. Required 500 lfpm air flow when using −5 V power supply. For (VCC − VEE) >3.3 V, 5 W to 10 W in line with VEE required for maximum thermal protection at elevated temperatures. Recommend VCC−VEE operation at 3.3 V. 22. All loading with 50 W to VCC − 2.0 V. 23. VIHCMR min varies 1:1 with VEE, VIHCMR max varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential input signal. http://onsemi.com 7 MC10EP016, MC100EP016 Table 12. AC CHARACTERISTICS VEE = −3.0 V to −5.5 V; VCC = 0 V or VCC = 3.0 V to 5.5 V; VEE = 0 V (Note 24) −40°C Symbol Characteristic fCOUNT Maximum Frequency tPLH tPHL Propagation Delay (10) (10) (10) (10) (10) (10) (100) (100) (100) (100) (100) (100) tS Min Typ 25°C Max Min >1 > 800 Q, TC COUT/COUT Typ 85°C Max Min >1 > 800 350 400 400 350 450 400 400 450 400 450 450 500 500 500 500 450 550 500 550 590 550 590 600 640 −50 300 300 300 100 500 500 500 −50 300 300 300 100 500 500 500 Max >1 > 800 GHz MHz 300 300 350 250 400 300 350 400 350 400 400 450 460 400 420 350 470 400 500 550 500 550 550 600 Setup Time Pn CE PE TCLD 100 500 500 500 tH Hold Time Pn CE PE TCLD 100 500 500 500 tJITTER Clock Random Jitter (RMS >1000 Waveforms) tRR Reset Recovery Time 200 80 200 80 200 80 ps tPW Minimum Pulse Width CLK, MR 550 300 550 300 550 300 ps tr tf Output Rise/Fall Times 20% − 80% 120 210 120 220 150 250 8.5 320 400 450 400 400 450 450 480 520 480 520 530 570 560 580 550 510 600 560 630 670 630 670 680 720 −50 300 300 300 100 500 500 500 −50 300 300 300 ps −50 300 300 300 100 500 500 500 −50 300 300 300 ps 2.5 650 600 600 550 700 650 700 750 700 750 800 850 Unit CLK to Q MR to Q CLK to TC MR to TC CLK to COUT MR to COUT CLK to Q MR to Q CLK to TC MR to TC CLK to COUT MR to COUT 2.6 600 500 550 450 650 550 650 700 650 700 750 800 Typ 8.0 320 2.5 700 700 700 600 800 700 780 820 780 820 880 920 8.0 450 ps ps ps NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are applied individually under normal operating conditions and not valid simultaneously. 24. Measured using a 750 mV source, 50% duty cycle clock source. All loading with 50 W to VCC − 2.0 V. http://onsemi.com 8 MC10EP016, MC100EP016 Applications Information Cascading Multiple EP016 Devices For applications which call for larger than 8-bit counters multiple EP016s can be tied together to achieve very wide bit width counters. The active low terminal count (TC) output and count enable input (CE) greatly facilitate the cascading of EP016 devices. Two EP016s can be cascaded without the need for external gating, however for counters wider than 16 bits external OR gates are necessary for cascade implementations. Figure 3 below pictorially illustrates the cascading of 4 EP016s to build a 32-bit high frequency counter. Note the EP01 gates used to OR the terminal count outputs of the lower order EP016s to control the counting operation of the higher order bits. When the terminal count of the preceding device (or devices) goes low (the counter reaches an all 1s state) the more significant EP016 is set in its count mode and will count one binary digit upon the next positive clock transition. In addition, the preceding devices will also count one bit thus sending their terminal count outputs back to a high state disabling the count operation of the more significant counters and placing them back into hold modes. Therefore, for an EP016 in the chain to count, all of the lower order terminal count outputs must be in the low state. The bit width of the counter can be increased or decreased by simply adding or subtracting EP016 devices from Figure 3 and maintaining the logic pattern illustrated in the same figure. The maximum frequency of operation for a cascaded counter chain is set by the propagation delay of the TC output, the necessary setup time of the CE input, and the propagation delay through the OR gate controlling it (for 16−bit counters the limitation is only the TC propagation delay and the CE setup time). Figure 3 shows EP01 gates used to control the count enable inputs, however, if the frequency of operation is slow enough, a LVECL OR gate can be used. Using the worst case guarantees for these parameters. LOAD Q0 to Q7 LO CE PE EP016 LSB CLK CLK TC Q0 to Q7 CE Q0 to Q7 PE CE EP016 CLK CLK PE CE CLK CLK TC PE EP016 MSB EP016 CLK CLK TC TC EP01 EP01 P0 to P7 Q0 to Q7 P0 to P7 P0 to P7 P0 to P7 CLK CLK Figure 3. 32-Bit Cascaded EP016 Counter Programmable Divider Note that this assumes the trace delay between the TC outputs and the CE inputs are negligible. If this is not the case estimates of these delays need to be added to the calculations. The EP016 has been designed with a control pin which makes it ideal for use as an 8-bit programmable divider. The TCLD pin (load on terminal count) when asserted reloads the data present at the parallel input pin (Pn’s) upon reaching terminal count (an all 1s state on the outputs). Because this feedback is built internal to the chip, the programmable division operation will run at very nearly the same frequency as the maximum counting frequency of the device. Figure 4 below illustrates the input conditions necessary for utilizing the EP016 as a programmable divider set up to divide by 113. http://onsemi.com 9 MC10EP016, MC100EP016 Applications Information (continued) H L L P7 P6 P5 L H H H H P4 P3 P2 P1 P0 Table 13. Preset Values for Various Divide Ratios Preset Data Inputs Divide H PE Ratio P7 P6 P5 P4 P3 P2 P1 P0 L CE 2 H H H H H H H L H TCLD 3 H H H H H H L H 4 H H H H H H L L 5 H H H H H L H H w w • • • • • • • TC CLK COUT CLK COUT Q4 Q3 Q2 Q1 Q0 Q7 Q6 Q5 Figure 4. Mod 2 to 256 Programmable Divider To determine what value to load into the device to accomplish the desired division, the designer simply subtracts the binary equivalent of the desired divide ratio from the binary value for 256. As an example for a divide ratio of 113: Pn’s = 256 − 113 = 8F16 = 1000 1111 where: P0 = LSB and P7 = MSB Forcing this input condition as per the setup in Figure 4 will result in the waveforms of Figure 5. Note that the TC output is used as the divide output and the pulse duration is equal to a full clock period. For even divide ratios, twice the desired divide ratio can be loaded into the EP016 and the TC output can feed the clock input of a toggle flip flop to create a signal divided as desired with a 50% duty cycle. Load CLK 1001 0000 w • • • • • • • • 112 H L L H L L L L 113 H L L L H H H H 114 H L L L H H H L • • • • • • • • • • • • • • • • • • 254 L L L L L L H L 255 L L L L L L L H 256 L L L L L L L L A single EP016 can be used to divide by any ratio from 2 to 256 inclusive. If divide ratios of greater than 256 are needed multiple EP016s can be cascaded in a manner similar to that already discussed. When EP016s are cascaded to build larger dividers the TCLD pin will no longer provide a means for loading on terminal count. Because one does not want to reload the counters until all of the devices in the chain have reached terminal count, external gating of the TC pins must be used for multiple EP016 divider chains. 1001 0001 1111 1100 ••• 1111 1101 1111 1110 1111 1111 ••• PE ••• TC DIVIDE BY 113 Figure 5. Divide by 113 EP016 Programmable Divider Waveforms http://onsemi.com 10 Load MC10EP016, MC100EP016 Applications Information (continued) EP01 Q0 to Q7 LO CE Q0 to Q7 PE CE EP016 LSB CLK CLK Q0 to Q7 PE CE EP016 CLK CLK TC Q0 to Q7 PE CE EP016 CLK CLK TC EP016 MSB CLK CLK TC EP01 P0 to P7 PE TC EP01 P0 to P7 P0 to P7 P0 to P7 CLK CLK Figure 6. 32-Bit Cascaded EP016 Programmable Divider Maximizing EP016 Count Frequency Figure 6 shows a typical block diagram of a 32-bit divider chain. Once again to maximize the frequency of operation EP01 OR gates were used. For lower frequency applications a slower OR gate could replace the EP01. Note that for a 16-bit divider the OR function feeding the PE (program enable) input CANNOT be replaced by a wire OR tie as the TC output of the least significant EP016 must also feed the CE input of the most significant EP016. If the two TC outputs were OR tied the cascaded count operation would not operate properly. Because in the cascaded form the PE feedback is external and requires external gating, the maximum frequency of operation will be significantly less than the same operation in a single device. Q The EP016 device produces 9 fast transitioning single−ended outputs, thus VCC noise can become significant in situations where all of the outputs switch simultaneously in the same direction. This VCC noise can negatively impact the maximum frequency of operation of the device. Since the device does not need to have the Q outputs terminated to count properly, it is recommended that if the outputs are not going to be used in the rest of the system they should be left unterminated. In addition, if only a subset of the Q outputs are used in the system only those outputs should be terminated. Not terminating the unused outputs will not only cut down the VCC noise generated but will also save in total system power dissipation. Following these guidelines will allow designers to either be more aggressive in their designs or provide them with an extra margin to the published data book specifications. Zo = 50 W D Receiver Device Driver Device Q D Zo = 50 W 50 W 50 W VTT VTT = VCC − 2.0 V Figure 7. Typical Termination for Output Driver and Device Evaluation (See Application Note AND8020/D − Termination of ECL Logic Devices.) http://onsemi.com 11 MC10EP016, MC100EP016 ORDERING INFORMATION Package Shipping † MC10EP016FA LQFP−32 250 Units / Tray MC10EP016FAG LQFP−32 (Pb−Free) 250 Units / Tray MC10EP016FAR2 LQFP−32 2000 / Tape & Reel MC10EP016FAR2G LQFP−32 (Pb−Free) 2000 / Tape & Reel MC100EP016FA LQFP−32 250 Units / Tray MC100EP016FAG LQFP−32 (Pb−Free) 250 Units / Tray MC100EP016FAR2 LQFP−32 2000 / Tape & Reel MC100EP016FAR2G LQFP−32 (Pb−Free) 2000 / Tape & Reel Device †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Resource Reference of Application Notes AN1405/D − ECL Clock Distribution Techniques AN1406/D − Designing with PECL (ECL at +5.0 V) AN1503/D − ECLinPSt I/O SPiCE Modeling Kit AN1504/D − Metastability and the ECLinPS Family AN1568/D − Interfacing Between LVDS and ECL AN1642/D − The ECL Translator Guide AND8001/D − Odd Number Counters Design AND8002/D − Marking and Date Codes AND8020/D − Termination of ECL Logic Devices AND8066/D − Interfacing with ECLinPS AND8090/D − AC Characteristics of ECL Devices http://onsemi.com 12 MC10EP016, MC100EP016 PACKAGE DIMENSIONS 32 A1 A −T−, −U−, −Z− 32 LEAD LQFP CASE 873A−02 ISSUE B 4X 25 0.20 (0.008) AB T−U Z 1 AE −U− −T− B P V 17 8 BASE METAL DETAIL Y V1 AC T−U Z AE DETAIL Y ÉÉ ÉÉ ÉÉ 9 −Z− S1 4X 0.20 (0.008) AC T−U Z F S 8X M_ D DETAIL AD G −AB− SECTION AE−AE C E −AC− H W K X DETAIL AD NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DATUM PLANE −AB− IS LOCATED AT BOTTOM OF LEAD AND IS COINCIDENT WITH THE LEAD WHERE THE LEAD EXITS THE PLASTIC BODY AT THE BOTTOM OF THE PARTING LINE. 4. DATUMS −T−, −U−, AND −Z− TO BE DETERMINED AT DATUM PLANE −AB−. 5. DIMENSIONS S AND V TO BE DETERMINED AT SEATING PLANE −AC−. 6. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE PROTRUSION IS 0.250 (0.010) PER SIDE. DIMENSIONS A AND B DO INCLUDE MOLD MISMATCH AND ARE DETERMINED AT DATUM PLANE −AB−. 7. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. DAMBAR PROTRUSION SHALL NOT CAUSE THE D DIMENSION TO EXCEED 0.520 (0.020). 8. MINIMUM SOLDER PLATE THICKNESS SHALL BE 0.0076 (0.0003). 9. EXACT SHAPE OF EACH CORNER MAY VARY FROM DEPICTION. DIM A A1 B B1 C D E F G H J K M N P Q R S S1 V V1 W X http://onsemi.com 13 MILLIMETERS MIN MAX 7.000 BSC 3.500 BSC 7.000 BSC 3.500 BSC 1.400 1.600 0.300 0.450 1.350 1.450 0.300 0.400 0.800 BSC 0.050 0.150 0.090 0.200 0.500 0.700 12_ REF 0.090 0.160 0.400 BSC 1_ 5_ 0.150 0.250 9.000 BSC 4.500 BSC 9.000 BSC 4.500 BSC 0.200 REF 1.000 REF INCHES MIN MAX 0.276 BSC 0.138 BSC 0.276 BSC 0.138 BSC 0.055 0.063 0.012 0.018 0.053 0.057 0.012 0.016 0.031 BSC 0.002 0.006 0.004 0.008 0.020 0.028 12_ REF 0.004 0.006 0.016 BSC 1_ 5_ 0.006 0.010 0.354 BSC 0.177 BSC 0.354 BSC 0.177 BSC 0.008 REF 0.039 REF Q_ 0.250 (0.010) 0.10 (0.004) AC GAUGE PLANE SEATING PLANE J R M N 9 0.20 (0.008) B1 MC10EP016, MC100EP016 ECLinPS is a trademark of Semiconductor Components INdustries, LLC (SCILLC). ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: N. American Technical Support: 800−282−9855 Toll Free Literature Distribution Center for ON Semiconductor USA/Canada P.O. Box 61312, Phoenix, Arizona 85082−1312 USA Phone: 480−829−7710 or 800−344−3860 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada Phone: 81−3−5773−3850 Email: [email protected] http://onsemi.com 14 ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. MC10EP016/D