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| 3-BIT SCANNABLE REGISTERED BUS TRANSCEIVER FEATURES s s s s s s s s s s s s s s 1500ps max. clock to bus (data transmit) 1000ps max. clock to Q (data receive) Extended 100E VEE range of -4.2V to -5.5V 25 cutoff bus outputs 50 receiver outputs Scannable implementation of E336 Synchronous and asynchronous bus enables Non-inverting data path Bus outputs feature internal edge slow-down capacitors Additional package ground pins Fully compatible with industry standard 10KH, 100K ECL levels Internal 75K input pulldown resistors Fully compatible with Motorola MC10E/100E337 Available in 28-pin PLCC package SY10E337 SY100E337 DESCRIPTION The SY10/100E337 are 3-bit registered bus transceivers with scan designed for use in new, high- performance ECL systems. The bus outputs (BUS0-BUS2) are designed to drive a 25 bus; the receive outputs (Q0-Q2) are designed for 50. The bus outputs feature a normal logic HIGH level (VOH) and a cutoff LOW level of -2.0V and the output emitter-follower is "off", presenting a high impedance to the bus. The bus outputs also feature edge slow-down capacitors. Both drive and receive sides feature the same logic, including a loopback path to hold data. The LOAD/HOLD function is controlled by Transmit Enable (TEN) and Receive Enable (REN) on the transmit and receive sides, respectively, with a HIGH selecting LOAD. The implementation of the E337 Receive Enable differs from that of the E336. A synchronous bus enable (SBUSEN) is provided for normal, non-scan operation. The asynchronous bus disable (ABUSDIS) disables the bus for scan mode. The SYNCEN input allows either synchronous or asynchronous re-enabling after disabling with ABUSDIS. An alternative use is asynchronous-only operation with ABUSDIS, in which case SYNCEN is tied LOW. SYNCEN is implemented as an overriding SET control to the enable flip-flop. Scan mode is selected by a logic HIGH at the SCAN input. Scan input data is shifted in through S-IN, and output data appears at the Q2 output. All registers are clocked on the rising edge of CLK. Additional lead-frame grounding is provided through the ground pins (GND) which should be connected to 0V. The GND pins are not electrically connected to the chip. PIN CONFIGURATION A0 ABUSDIS SBUSEN SYNCEN VCCO 25 24 23 22 21 20 19 SCAN S-IN TEN VEE REN CLK A1 B0 Q0 26 27 28 1 2 3 4 5 6 7 8 9 10 11 18 17 TOP VIEW PLCC J28-1 16 15 14 13 12 GND BUS0 VCC Q1 VCCO BUS1 GND PIN NAMES Pin A0-A2 B0-B2 S-IN TEN, REN SCAN ABUSDIS SBUSEN SYNCEN CLK BUS0-BUS2 Q0-Q2 VCCO 1 Function Data Inputs A Data Inputs B Serial (Scan) Data Input LOAD/HOLD Controls Scan Control Asynchronous Bus Disable Synchronous Bus Enable Synchronous Enable Control Clock 25 Cutoff BUS Outputs Receive Data Outputs (Q2 serves as SCAN_OUT in scan mode) VCC to Output Rev.: C Amendment: /2 Issue Date: February, 1998 BUS2 A2 B2 VCCO GND Q2 B1 Micrel SY10E337 SY100E337 BLOCK DIAGRAM BUS2 D A2 B2 Q D Q Q2 SCAN-OUT BUS1 D A1 B1 BUS0 D A0 B0 S-IN TEN REN SCAN ABUSDIS SBUSEN SYNCEN CLK D SET Q D Q Q1 Q D Q Q0 Q 2 Micrel SY10E337 SY100E337 DC ELECTRICAL CHARACTERISTICS VEE = VEE (Min.) to VEE (Max.); VCC = VCCO = GND TA = 0C Symbol VCUT IIH IEE Parameter Cut-off Output Voltage Input HIGH Current All Other Inputs Power Supply Current 10E 100E -- -- 145 145 174 174 -- -- 145 125 174 174 -- -- 145 167 174 200 Min. -2.10 -- TA = +25C TA = +85C Min. Typ. -- -- Max. -2.03 150 Unit V A mA Condition 1 -- -- Typ. Max. Min. Typ. Max. -- -- -2.03 -2.10 150 -- -- -- -2.03 -2.10 150 -- NOTE: 1. Applies to BUS outputs only. Measured with VTT = -2.10V. AC ELECTRICAL CHARACTERISTICS VEE = VEE (Min.) to VEE (Max.); VCC = VCCO = GND TA = 0C Symbol tPLH tPHL Parameter Propagation Delay to Output CLK to Q CLK to BUS ABUSDIS SYNCEN Set-up Time BUS SBUSEN Data, S-IN TEN, REN, SCAN Hold Time BUS SBUSEN Data, S-IN TEN, REN, SCAN Minimum Pulse Width Rise/Fall Time 20% to 80% (Qn) 20% to 80% (BUSn Rise) 20% to 80% (BUSn Fall) TA = +25C TA = +85C Min. Typ. 450 800 500 800 350 100 400 550 350 500 350 200 400 300 500 300 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Max. 1000 1800 1500 1800 ps 350 100 400 550 350 500 350 200 400 300 500 300 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 800 1000 800 350 100 400 550 350 500 350 200 400 300 500 300 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 800 1000 800 -- -- -- -- ps -- -- -- -- -- 800 1000 800 ps ps -- -- -- -- Unit ps 450 800 500 800 -- -- -- -- 1000 1800 1500 1800 450 800 500 800 -- -- -- -- 1000 1800 1500 1800 Condition -- Min. Typ. Max. Min. Typ. Max. tS tH tPW tr tf PRODUCT ORDERING CODE Ordering Code SY10E337JC SY10E337JCTR SY100E337JC SY100E337JCTR Package Type J28-1 J28-1 J28-1 J28-1 Operating Range Commercial Commercial Commercial Commercial 3 Micrel SY10E337 SY100E337 28 LEAD PLCC (J28-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA FAX + 1 (408) 980-9191 + 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. (c) 2000 Micrel Incorporated 4 |
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