SY10E136 Micrel, Inc. SY100E136 6-BIT UNIVERSAL SY10E136 SY100E136 UP/DOWN COUNTER FEATURES DESCRIPTION 550MHz count frequency The SY10/100E136 are 6-bit synchronous, presettable, cascadable universal counters. These devices generate Extended 100E VEE range of 4.2V to 5.5V a look-ahead-carry output and accept a look-ahead-carry Look-ahead-carry input and output input. These two features allow for the cascading of Fully synchronous up and down counting multiple E136s for wider bit width counters that operate Asynchronous Master Reset at very nearly the same frequency as the stand-alone counter. Internal 75K input pull-down resistors The CLOUT output will pulse LOW for one clock cycle Available in 28-pin PLCC package one count before the E136 reaches terminal count. The COUT output will pulse LOW for one clock cycle when the counter reaches terminal count. For more information on utilizing the look-ahead-carry features of the device, please refer to the applications section of this data sheet. The differential COUT output facilitates the E136 s use in PIN NAMES programmable divider and self-stopping counter applications. Pin Function Unlike the H136 and other similar universal counter D0D5 Preset Data Inputs designs, the E136 carry-out and look-ahead-carry-out signals are registered on chip. This design alleviates the Q0Q5 Differential Data Outputs glitch problem seen on many counters where the carry- S1, S2 Mode Control Pins out signals are merely gated. Because of this architecture, MR Master Reset there are some minor functional differences between the E136 and H136 counters. The user, regardless of CLK Clock Input familiarity with the H136, should read this data sheet COUT, COUT Carry Out Output (Active LOW) carefully. Note specifically (see block diagram) the CLOUT Look-Ahead-Carry Output operation of the carry-out outputs and the look-ahead- CIN Carry-In Input (Active LOW) carry-in input when utilizing the Master Reset. When left open, all of the input pins will be pulled CLIN Look-Ahead-Carry Input LOW via an input pulldown resistor. The Master Reset is VCCO VCC to Output an asynchronous signal which, when asserted, will force the Q outputs LOW. The Q outputs need not be terminated for the E136 to function properly. In fact, if these outputs will not be used in a system, it is recommended that they be left open to save power and minimize noise. This practice will minimize switching noise which can reduce the maximum count frequency of the device, or significantly reduce margins against other noise in the system. Rev.: F Amendment: 0 M9999-032006 1 Issue Date: March 2006 hbwhelp micrel.com or (408) 955-1690SY10E136 Micrel, Inc. SY100E136 PACKAGE/ORDERING INFORMATION (1) Ordering Information Package Operating Package Lead Part Number Type Range Marking Finish 25 24 23 22 21 20 19 SY10E136JC J28-1 Commercial SY10E136JC Sn-Pb 26 18 Q3 D2 (2) SY10E136JCTR J28-1 Commercial SY10E136JC Sn-Pb S2 27 17 Q2 S1 28 16 VCC SY100E136JC J28-1 Commercial SY100E136JC Sn-Pb PLCC VEE 1 15 VCCO TOP VIEW (2) SY100E136JCTR J28-1 Commercial SY100E136JC Sn-Pb J28-1 CLK COUT 2 14 CIN COUT SY10E136JC J28-1 Commercial SY10E136JC Sn-Pb 3 13 CLIN (2) 4 12 CLOUT SY10E136JCTR J28-1 Commercial SY10E136JC Sn-Pb 5 6789 10 11 SY100E136JC J28-1 Commercial SY100E136JC Sn-Pb (2) SY100E136JCTR J28-1 Commercial SY100E136JC Sn-Pb (3) SY10E136JZ J28-1 Commercial SY10E136JZ with Matte-Sn Pb-Free bar-line indicator 28-Pin PLCC (J28-1) (2, 3) J28-1 Commercial SY10E136JZ with Matte-Sn SY10E136JZTR Pb-Free bar-line indicator (3) SY100E136JZ J28-1 Commercial SY100E136JZ with Matte-Sn Pb-Free bar-line indicator (2, 3) SY100E136JZTR J28-1 Commercial SY100E136JZ with Matte-Sn Pb-Free bar-line indicator Notes: 1. Contact factory for die availability. Dice are guaranteed at T = 25C, DC Electricals only. A 2. Tape and Reel. 3. Pb-Free package is recommended for new designs. M9999-032006 2 hbwhelp micrel.com or (408) 955-1690 MR D3 D1 D4 D0 D5 VCCO VCCO Q0 Q5 Q1 Q4 VCCO VCCO