MEDM5186 ETC | Alldatasheet

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i The ENCOMEN From wAz data to Manchester I code. The encoder employs a TCLK signal at data-rate frequency, 50% The transmit-enable input (TEN), when high, permits the en- duty cycle. This TCLK signal can be from an available system clock coder to transmit (MANOUT). If TEN goes low, transmission stops. or from the clock oscillator of the MEDM in combination with an Likewise, RESET must remain high for the full duration of NRZ external crystal. When shifting NRZ-TTL data from the LAN control- serial data transmission. Low on RESET will terminate encoder ler to the MEDM, the data shifts on the beginning transition (falling activity and bring all outputs to known state or origin. edge) of the clock signal (TCLK), and is accepted into the module Encoder cycle begins when RESET and TEN go high, enabling as TDATA. The MEDM then samples TDATA on mid-transition (ris- NRZ serial data presented at TDATA to be sampled into the MEDM Ing edge) of the clock signal, permitting 12-bit settling time of TDATA and encoded into TTL Manchester II biphase data (MANOUT), before sampling. The sampling of very stable TDATA permits very which contains both data and clock information. teliable encoding. es ee RESET bee twr-4 trs — ' : \\ ©. fe a | te bq | TEN i i | y " TCLK i fl fl q ' i} ! as tas eine et nee en 0p | i re ae 1 t th TDATA ee ea ee tot od 1 i y tpde |! ey MANOUT H i H ( () 1 1 ° 1 ( @ Reset must remain high untif last information bit is transmitted. Figure 4 Encoder timing diagram. The GECOdESS From Manchester code to NAZ data. The decoder of the Technitrol MEDM is free running. It has a very Binary 0 on the first bit synchronizes the decoder to the MANIN wide jitter tolerance and functions without error for MANIN signals signal if the idle state of MANIN is low. Likewise, binary 1 on the first with + 10% time skew, bit synchronizes the decoder to MANIN If its idle state is high. The decoder accepts TTL Manchester Il encoded signal Generally, binary 0 followed by binary 1 or 1 followed by 0 (MANIN) from the LAN transceiver and generates both a NRZ-TTL guarantees decoder synchronization and reliable data transmission signal (RDATA) and a clock signal that permit direct interfacing to by the second bit of MANIN. the LAN controller. RDATA is sampled into the LAN controller on the Low level on RESET terminates decoder operation and returns falling edge of RCLK (not a true 50/50 clock signal). all output to known state or origin. RESET. ' _ RESET Lal trs be— bengoebeomebeni ete tebe tote ote i © | MANIN 4 t RCLK ee ' i t ' ' t ' tofielsritstiow | of EEE pod yy ' i H | i H ! i H ' i H 1 { i I { RDATA H | H ! 0 0 1 1 to) 1 ) 1 @ Reset must remain high until last information bitis transmitted. Figure § Decoder timing diagram. Technitrol —. ——

Electrical characteristics over operating range: Maximum ratings [__MEDM5XXxx | MEDM2XXx Operating conditions Commercial Milita Supply voltage V,, +00 Vo ‘Supply voltage V,, 50 +,25V 50 +5V Input or output voltage applied | -.5 to +55V =3 to +55V Operating temperature ranges: | 0 to 70°C 65°C to +125°C Storage temperature ~85°C to +150°C DC characteristics [EDMSXXX | MEDM2XXX Symbol | Parameter —~——S~S~dSCSinit‘|MIN | MAX. [ Tost Conditions | MIN. | MAX. | Test Conditions Vn Logical “1” input voltage v 20 20 Vit Logical "0" input voltage v 08 08 I Inputlow current uA ~200 V,=.5V ~2.0 +20 V=0v la Input-high current uA 20 V,=2.4V -20 +20 VeVi, Vox Logical “1” output voltage Vv 24 Jo =3.3MA 24 Joy =3.4mA Vou Logical "o” output voltage v 04 1, =10mA. 4 1g, =3.4mA Necep ‘Supply mA 65 V., =5.25V_ 35 Vi, 5.25 fy Input High Current HA 200 Vi_=55V ~20 42.0 Vin5.25 I Output short current mA 15 100 ¥,=0v - - ve Input clamp voltage v 15 l= 18mA - - Cy Input Capacitance PF - = 40 Encoder timing t, Encoder transmit-clock frequency and data rate 0 0 5 ttt Encoder-clock riso & fall time ©, =10pt 8 ©, =10pf twr Reset pulse width 15 400 i Serial data setup (data to TCLK rising edge) 40 10 ty Serial data hold (TCLK rising edge to data transition) 5 5 t, ‘Transmit-enable setup (TEN rising to clock rising edge) 50 50 yee ‘Transmit clock falling edge to MANOUT delay 68 i RESET setup (RESET rising edge to clock rising edge) 50 400 Decoder timing . , Decoder data rate & receive clock frequency 10 500 See note 1 1 16 See note tills Receive-clock rise & fall time 80 C,=10pt 8 C,=10pt te RESET pulse width 15 100 ts RESET setup (RESET rising to first MANIN transition) 10 50 tose MANIN first transition to receive-clock rising-edge delay 25 12 68 fees Recelve-clock to: receive data delay 100 10 te Recelve-clock pulse width 3001, f, In Mbis 300/, f, in Mb/s (2 Guaranteed to work with {,+10% from nominal value. @ TA = 25°C V,, = 50 £.01V Ordering and package information: ae ee a oe Standard Part Number (MEDMSXXX) Data Rate | Standard Part Number (MEDM2XXX) Data Rate ee MEDM5500 50 Mbis MEDM2150 15 Mbis MEDM5400 40 Mbis MEDM2120 12 Mbis Bes eo oo MEDMS5300 30 Mb/s MEDM2100 10 Mbis oe eee ee MEDM5260 25 Mbis MEDM2050 5 Mbis SHEE SE SS Sd MEDM5186 186 Mbis MEDM2010 1 Mbis To order, specify part number as explained in the following example: Example: MEDM-5203—MX MEDM-5 203 — WX WARRANTY ‘Technitrol warrants for a period of 90 days from the date 1 ee of: shipment Sat, wider normal use and service, Its prod- MEDM2 —Technitrol MEDM. CMOS LOGIC FAMILY ucts will be free from defects in workmanship and material. Technitrol's sole ibility under thi - MEDMS —Technitrol MEDM. LOW-POWER SCHOTTKY LOGIC rant iat ts opton to repairerolace without charge, 2. Data rate description: any fective Product part, cr ‘to credit buyer for the 203 203 Mbis (1-18 Mb/s data rates for MEDM 2XXX) Purchase price of such dafective products prowae 010 1.0 Mbis (1-50 Mb/s data rates for MEDM 5XXX) ea erie waren potod and 3. Design level: 2. The defective product of part Is returned to — Standard part; no special customer requirements no digit necessary. ower ang {transportation charges prepaid by AZ Custom part. Letter assigned at factory. Simply specify a dash (as above) 3. Technitrol’s examination of such product shall until this letter Is assigned. disclose to its satisfaction that sald defect exists and 4. Temperature range and screening: pes ot been caused by misuse, neglect, improper — Standard part; commercial temperature range of 0-70°C. Eee eMOVE WARSANTY AND THE IM- CY Commercial part with in-house burn-in and thermal shock per customer requirements, PLIED WARRANTY OF TITLE, TECHNITROL MAKES M__ Military operating temperature range, ~55° to +125°C. NO OTHER WARRANTIES, EXPRESS OR IMPLIED, MX_ IC screened to MIL-STD-883B. INCLUDING ANY IMPLIED, WARRANTY, OF MER. MY MX unit with additional burn-in and thermal shock, NY PARTICULAR a PURPOSE. TECHNITROL WILL NOT BE LIABLE FOR MZ M unit with in-house burn-in and thermal shock. INCIDENTIAL OR CONSEQUENTIAL, DAMAGES UNDER ANY CIRCUMSTANCES. Technitrol