Micrel, Inc. 5-BIT REGISTERED TRANSCEIVER FEATURES SY100S891 SY100S891 DESCRIPTION 25Ω cut-off bus outputs 50Ω receiver outputs Transmit and receive registers with separate clocks 1500ps max. delay from CLK1 to Bus Outputs (BUS) 1500ps max. delay from CLK2 to Receiver Outputs (Q) Individual bus enable pins Internal 75KΩ input pull-down resistors Voltage and temperature compensation for improved noise immunity ■ Industry standard 100K ECL levels ■ Extended supply voltage option: VEE = –4.2V to –5.5V ■ Available in 28-pin PLCC package ■ ■ ■ ■ ■ ■ ■ ■ The SY100S891 is a 5-bit registered transceiver containing five bus transceivers with both transmit and receive registers. The bus outputs (BUS0 – BUS4) are specified for driving a 25 ohm bus and the receive outputs (Q0 – Q4) are specified for driving a 50 ohm line. The bus outputs have a normal high level output voltage and a normal low level output voltage when the bus enable (BUSEN0 – BUSEN4) is high. However, the output is switched to a cut-off level when a bus-enable is low. This cut-off level is sufficiently low that a relatively high impedance is presented to the bus in order to minimize reflections. There is one bus-enable for each bus driver; a clock (CLK1) which is common to all five bus driver registers; and a separate clock (CLK2) which is common to all five receive registers. Data at the D inputs is clocked to the Bus register by a positive transition of CLK1 and data on the bus is clocked into the Receiver register by a positive transition of CLK2. A high on the Master Reset clears all registers. PIN NAMES Pin M9999-032406 [email protected] or (408) 955-1690 Function BUSEN0–4 Bus Enable Inputs D0 – D4 Data Inputs CLK1 Bus Driver Clock Input CLK2 Receive Register Clock MR Master Reset Q0 – Q4 Bus Receive Outputs BUS0–4 Bus Outputs Rev.: F 1 Amendment: /0 Issue Date: March 2006 Micrel, Inc. SY100S891 Ordering Information Q4 BUS 4 VCCA D3 BUSEN3 D4 BUSEN4 PACKAGE/ORDERING INFORMATION 25 24 23 22 21 20 19 MR 26 18 Q3 CLK2 27 17 CLK1 VEE 28 16 BUS3 VCC 15 Q2 14 TOP VIEW PLCC J28-1 1 D2 BUSEN2 2 3 13 BUS2 VCCA D1 4 12 Q1 5 6 7 8 9 Part Number Package Type Operating Range Package Marking Lead Finish SY100S891JC J28-1 Commercial SY100S891JC Sn-Pb SY100S891JCTR(1) J28-1 Commercial SY100S891JC Sn-Pb SY100S891JZ(2) J28-1 Commercial SY100S891JC with Pb-Free bar-line indicator Matte-Sn SY100S891JZTR(1, 2) J28-1 Commercial SY100S891JC with Pb-Free bar-line indicator Matte-Sn 10 11 BUS1 Q0 BUS0 VCCA BUSEN0 BUSEN1 D0 Notes: 1. Tape and Reel. 2. Pb-Free package is recommended for new designs. 28-Pin PLCC (J28-1) M9999-032406 [email protected] or (408) 955-1690 2 Micrel, Inc. SY100S891 BLOCK DIAGRAM D0 25Ω CUTOFF D Q R C D Q R C 50Ω BUS 0 Q0 BUSEN0 D1 25Ω CUTOFF D Q R C D Q R C 50Ω BUS 1 Q1 BUSEN1 D2 25Ω CUTOFF D Q R C D Q R C 50Ω BUS 2 Q2 BUSEN2 D3 25Ω CUTOFF D Q R C D Q R C BUSEN3 D4 25Ω CUTOFF D Q R C D Q R C BUSEN4 MR CLK 1 CLK 2 M9999-032406 [email protected] or (408) 955-1690 50Ω 3 50Ω BUS 3 Q3 BUS 4 Q4 Micrel, Inc. SY100S891 DC ELECTRICAL CHARACTERISTICS VEE = –4.2V to –5.5V unless otherwise specified; VCC = VCCA = GND Symbol Parameter Min. Typ. Max. Unit –2160 –2100 mV VIN = VIH (Max.) or VIL (Min.) VIN = VIH (Max.) or VIL (Min.) VCUT Cut-off Bus Output Voltage –2200 VOH Output HIGH Voltage Bus –1025 –955 –880 mV VOL Output LOW Voltage Bus –1810 –1705 –1620 mV VOHA Output HIGH Voltage Bus –1035 — — mV VOLA Output LOW Voltage Bus — — –1610 mV Condition Loading with 25Ω to –2.20V Loading with 25Ω to –2.0V VIN = VIH (Min.) or VIL (Max.) VOH Output HIGH Voltage Receiver –1025 –955 –880 mV VOL Output LOW Voltage Receiver –1810 –1705 –1620 mV VOHA VOLA Output HIGH Voltage Receiver Output LOW Voltage Receiver –1035 — — — — –1610 mV mV VIH Input HIGH Voltage –1165 — –880 mV Guaranteed HIGH Signal for All Inputs VIL Input LOW Voltage –1810 — –1475 mV Guaranteed LOW Signal for All Inputs IIL Input LOW Current 0.5 — — µA VIN = VIL (Min.) IIH Input High Current — — 150 µA VIN = VIH (Max.) IEE Power Supply Current –216 — — mA Inputs Open CIN Input Pin Capacitance — 4 — pF COUT Output Pin Capacitance — 5 — pF M9999-032406 [email protected] or (408) 955-1690 4 VIN = VIH (Max.) or VIL (Min.) Loading with 50Ω to –2.0V VIN = VIH (Min.) or VIL (Max.) Micrel, Inc. SY100S891 AC ELECTRICAL CHARACTERISTICS VEE = –4.2V to –5.5V unless otherwise specified; VCC = VCCA = GND TA = 0°C Symbol Parameter TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit tPLH tPHL Propagation CLK1 to Bus Delay(1) 600 1000 1500 600 1000 1500 600 1000 1500 ps tPLH tPHL Propagation Delay(2) CLK2 to Q 500 800 1200 500 800 1200 500 800 1200 ps tPLH tPHL Propagation Delay(1) BUSEN to Bus 500 800 1200 500 800 1200 500 800 1200 ps tPLH tPHL Propagation Delay(1) Master Reset to Bus 600 1000 1500 600 1000 1500 600 1000 1500 ps tPLH tPHL Propagation Delay(2) Master Reset to Q 500 800 1200 500 800 1200 500 800 1200 ps tS Set-up Time Bus Wrt CLK2 D Wrt CLK1 — — — — 400 400 — — — — 400 400 — — — — 400 400 — — 1000 — — 1000 — — 1000 — — — — 400 400 — — — — 400 400 — — — — 400 400 Output Rise Time Bus(3) Q(4) 500 300 — — 1000 900 500 300 — — 1000 900 500 300 — — 1000 900 Output Fall Time Bus(3) Q(4) 500 300 — — 1000 900 500 300 — — 1000 900 500 300 — — 1000 900 — 100 — — 100 — — 100 — tREL Master Reset Release Time tH Hold Time Bus Wrt CLK2 D Wrt CLK1 tr tf tskew Skew (Maximum difference between slowest and fastest path) ps ps ps ps Notes: 1. Loaded with 25Ω to –2.0V 2. Loaded with 50Ω to –2.0V 3. 25Ω Load 4. 50Ω Load M9999-032406 [email protected] or (408) 955-1690 ps 5 ps Condition Micrel, Inc. SY100S891 28-PIN PLCC (J28-1) Rev. 03 MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB USA http://www.micrel.com The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2006 Micrel, Incorporated. M9999-032406 [email protected] or (408) 955-1690 6