NOT RECOMMENDED FOR NEW DESIGNS 8-INPUT PECL SY100S863 Micrel, Inc. SY100S863 DIFFERENTIAL MUX WITH TTL SELECTS FEATURES DESCRIPTION Low skew The SY100S863 is a PECL 8:1 multiplexer designed for use in new, high-performance PECL systems. It has Differential PECL inputs differential PECL outputs and a standard TTL output. The Differential cut-off PECL outputs capable of driving TTL select inputs (SEL0, SEL1, SEL2) determine which one 25 load for driving data bus of the eight differential PECL data inputs (D0D7) is Tri-state TTL output propagated to the outputs. The enable pin, EN, is provided TTL select and enable input for expansion. When EN is at a TTL logic one level, both PECL and TTL outputs are enabled. When the enable pin Internal 75K PECL input pull-down resistors is set to TTL logic zero level, both PECL outputs of the PECL I/O fully compatible with industry standard differential pair are in cut-off and the TTL output is in a Available in 28-pin PLCC package three-state condition. PIN NAMES BLOCK DIAGRAM Pin Function D0 (4) D0 (5) D0, /D0 D7, /D7 Differential PECL Input Pairs D1 (6) Q, /Q Differential PECL Outputs D1 (7) QTTL TTL Output D2 (8) D2 (9) (17) Q EN Enable Input D3 (10) (18) Q 0,1,2 Select Inputs SEL D3 (11) 8:1 MUX D4 (27) (13) QTTL D4 (26) D5 (25) D5 (24) D6 (23) D6 (22) D7 (21) D7 (20) TTL INPUTS Rev.: G Amendment: /0 M9999-032406 1 Issue Date: March 2006 hbwhelp micrel.com or (408) 955-1690 8 DIFFERENTIAL PECL INPUTS EN (15) SEL0 (28) SEL1 (2) SEL2 (3)SY100S863 Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information Package Operating Package Lead Part Number Type Range Marking Finish 25 24 23 22 21 20 19 SY100S863JC J28-1 Commercial SY100S863JC Sn-Pb D4 26 18 Q (1) D4 27 17 SY100S863JCTR J28-1 Commercial SY100S863JC Sn-Pb Q SEL0 28 16 VCC (2) SY100S863JZ J28-1 Commercial SY100S863JZ with Matte-Sn TOP VIEW VEE 15 1 EN PLCC Pb-Free bar-line indicator 14 SEL1 2 J28-1 VCCT (1, 2) SY100S863JZTR J28-1 Commercial SY100S863JZ with Matte-Sn SEL2 3 13 QTTL Pb-Free bar-line indicator 4 12 D0 VGT 56 7 8 9 1011 Notes: 1. Tape and Reel. 2. Pb-Free package is recommended for new designs. 28-Pin PLCC (J28-1) M9999-032406 2 hbwhelp micrel.com or (408) 955-1690 D5 D0 D1 D5 D6 D1 D2 D6 D2 D7 D3 D7 D3 VCCO