ERROR DETECTION/ CORRECTION CIRCUIT FEATURES SY10E193 SY100E193 DESCRIPTION ■ Hamming code generation ■ Extended 100E VEE range of –4.2V to –5.5V The SY10/100E193 are error detection and correction (EDAC) circuits designed for use in new, high- performance ECL systems. The E193 generates hamming parity codes on an 8-bit word as shown in the block diagram. The P5 output gives the parity of the whole word. PGEN provides word parity after Odd/Even parity control and gating with the BPAR input. PGEN also feeds into a 1-bit shiftable register for use as part of a scan ring. The combinatorial part of the device generates the same code pattern as the Motorola MC10193. Used in conjunction with 12-bit parity generators, such as the E160, a SECDED (single error correction, double error detection) error system can be designed for a multiple of an 8-bit word. ■ ■ ■ ■ 8-bit wide Expandable for more width Provides parity register Fully compatible with industry standard 10KH, 100K ECL levels ■ Internal75KΩ input pulldown resistors ■ Fully compatible with Motorola MC10E/100E193 ■ Available in 28-pin PLCC package PIN NAMES Pin VCCO PGEN CLK S-IN SHIFT EN HOLD PIN CONFIGURATION Function B0–B7 Check Bit Inputs BPAR Check Bit Parity Input EV/OD Even/Odd Parity Select EV/OD 26 18 PARERR EN Parity Enable BPAR 27 17 Syndrome Hold Input 28 16 PARERR VCC HOLD B0 VEE 15 P5 S-IN Syndrome Bit Input 14 VCCO P4 P3 SHIFT Syndrome Bit Shift CLK Clock Input P1–P5 Parity Output PGEN Parity Generate Output PARERR/PARERR Parity Error Output VCCO VCC to Output 25 24 23 22 21 20 19 TOP VIEW PLCC J28-1 1 B1 2 B2 B3 3 13 4 12 7 8 9 10 11 VCCO P1 P2 6 B4 B5 B6 B7 5 Rev.: C 1 Amendment: /1 Issue Date: February, 1998 SY10E193 SY100E193 Micrel BLOCK DIAGRAM B INPUTS 0 3 6 5 7 4 2 1 B2, B3, B6, B7 P2 B1, B3, B5, B7 P1 B4, B5, B6, B7 B1, B2, B4, B7 BYTE (B0 – B7) P3 P4 P5 PGEN BPAR EV/OD EN 0 0 1 1 HOLD S-IN SHIFT CLK 2 D PARERR PARERR SY10E193 SY100E193 Micrel DC ELECTRICAL CHARACTERISTICS VEE = VEE (Min.) to VEE (Max.); VCC = VCCO = GND TA = 0°C Symbol Parameter TA = +25°C Min. Typ. Max. Min. Typ. IIH Input HIGH Current IEE Power Supply Current 10E 100E TA = +85°C Max. Min. Typ. Max. Unit Condition µA — mA — Unit Condition ps — ps — ps — ps — — — 150 — — 150 — — 150 — — 112 112 134 134 — — 112 112 134 134 — — 112 129 134 155 AC ELECTRICAL CHARACTERISTICS VEE = VEE (Min.) to VEE (Max.); VCC = VCCO = GND TA = 0°C Symbol Parameter TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. 1000 1150 850 1450 850 1000 1150 850 1450 850 tPLH tPHL Propagation Delay to Output B to P1, P2, P3, P4 B to P5 EV/OD, BPAR to PGEN B to PGEN CLK to PARERR 350 400 350 600 300 tS Set-up Time SHIFT S-IN HOLD EN EV/OD BPAR B 400 150 300 50 750 350 500 250 1300 850 1300 850 1700 1100 — — — — — — — 400 150 300 50 750 350 500 250 1300 850 1300 850 1700 1100 — — — — — — — 400 150 300 50 750 350 500 250 1300 850 1300 850 1700 1100 — — — — — — — Hold Time SHIFT S-IN HOLD EN EV/OD BPAR B 200 300 100 100 –200 –200 –300 –150 –50 –350 –250 –850 –850 –1100 — — — — — — — 200 300 100 100 –200 –200 –300 –150 –50 –350 –250 –850 –850 –1100 — — — — — — — 200 300 100 100 –200 –200 –300 –150 –50 –350 –250 –850 –850 –1100 — — — — — — — 300 700 1100 300 700 1100 300 700 1100 tH tr tf Rise/Fall Time 20% to 80% 700 1000 775 1150 650 850 1000 1450 550 850 350 400 350 600 300 PRODUCT ORDERING CODE Ordering Code Package Type Operating Range SY10E193JC J28-1 Commercial SY10E193JCTR J28-1 Commercial SY100E193JC J28-1 Commercial SY100E193JCTR J28-1 Commercial 3 700 775 650 1000 550 350 400 350 600 300 700 775 650 1000 550 SY10E193 SY100E193 Micrel 28 LEAD PLCC (J28-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA + 1 (408) 980-9191 FAX + 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. © 2000 Micrel Incorporated 4