SEEQ@ Technology Incorporated 83C92C Ethernet Transceiver February 17, 1998 Introduction The 83C92C is an Ethernet and Thin Net (Cheapernet) Transceiver that provides a complete Local Area Network interface for a station, with or without a transceiver cable, see Figure 1. The 83C92C is compatible with ANSIIEEE 802.3 and ISO 8802-3, and meets or exceeds the specification of the National Semiconductor DP8392A and DP8392B. The 83C92C is part of a chipset manufactured by SEEQ Technology to provide the basic components for a LAN interface board. The other components include the 8005 or 80C04A Advanced Ethernet Data Link Controller (AEDLC) and the 8020 or 8023A Manchester Code Converter (MCC). Features M@ The 83C92C is Compatible with ANSITEEE 802.3 and ISO 8802-3 Standards for Ethernet (10BASE5) and Thin Net (10BASE2). MH Meets or exceeds all data sheet specifications of the National Semiconductor DP8392A, DP8392B DP8392C and DP8392C-1. @ Squelich circuits on all signal inputs to eliminate noise. Note: Check for latest Data Sheet revision before starting any designs. Call SEEQ Technology (510) 226-7400 x3051. SEEQ Data Sheets are now on the Web, access SEEQ Home Page www.seeq.com. MH Coniains all transceiver functions on one chip, except power and DC isolation. For a complete Module Solution, refer to the EM2C data sheet. Collision Test Generator, externally deselectable to work with any ANSI/IEEE 802.3 and [SO 8802-3 repeater. Mf Detects and reports network collisions in both transmit and receive modes. m implemented with SEEQ proprietary high voltage (20V) and high performance CMOS process. M Loopback test detects network cable opens or shorts. M@ Power On Reset prevents transmission during power up. MH Temperature Ranges, Commercial 0C to +70C RX + RECEIVE LINE DRIVER TO STATION og RX- RECEIVE EQUALIZER COAX RX SQUELCH |~__ CABLE DATA COLLISION COMPARATOR CD + COLLISION} SIGNAL TO STATION<_J BUFFER | RXI ; LOW PASS COLLISION FILTER REFERENCE >} VOFFSET BUFFER J CDS COLLISION TEST cD - LINE DRIVER GENERATOR 10 MHz JABBER ~ OSILLATOR XO 1N916 TIMER _ TX SQUELCH TRANSMIT__1X+ _ | bs FROM STATION: TRANSMITTER AEDLC and MCC are trademarks of SEEQ Technology, Inc. Figure 1. 83C92C Ethernet Transceiver Block Diagram SEEQ Technology Incorporated MD400137/C SEEQ@ Description The 83C92C Ethernet Transceiver connects the station equipment to an Ethernet or Thin Net (Cheapernet) COAX cable. The 83C92C provides the drive current and wave shaping for the transmit signals. It supplies receive signal equalization, collision detection and squelch. When used in an Ethernet LAN, the 83C92C Transceiver is mounted on the Ethernet COAX cable, and connects to the station equipment through a transceiver cable. The 83C92C may be located up to 50 meters from the station equipment. When used for a Thin Net (Cheapernet) LAN, the 83C92C is usually mounted on the LAN adapter board in the station equipment, where it connects to the RG58 COAX through a BNC connector. 83C92C Description of the Pin Functions (See Figure 2) Dual-in-Line PIN# FUNCTION 1-2 CDz# Collision Output. A balanced 10 MHz differential output to the station equipment when a collision is detected, when excessive data transmission occurs (jabber), or during the Collision Test (Heartbeat Test). These are open- source outputs with V,, (-9 volts) pull down resistors, 500 ohms when operating with a 78-ohm Ethernet transceiver cable, and up to 1.5 kohms with an on-board transceiver for the Thin Net LAN cable. TOP VIEW DIP DUAL-IN-LINE TO 8023A TO OR 8020 83C92C NETWORK COLLISION 4 | "6 | cps 1N916 PAIR [ _CD- | 2 15 | Txo AXx+ | 3 14 | Rx RECEIVE Vee | 4 13 | Vee PAIR Vee| 5 12 | RR- A UK 1%) ax- | 6 11 | RR4 +4 | 7 10 | ano TOP VIEW (PLCC) PLASTIC LEADED CHIP CARRIER a Oo + x oa Figure 2. 83C92C Ethernet Transceiver Pin Configuration Technology Incorporated MD400137/C3,6 4, 5, 7-8 10 11-12 NOTE RX+t Receive Daia Output. Line Driver output from the 83C92C to the MCC Receive inputs, a balanced differential output with 500 ohm pull down resistors. These are open-source outputs with V,. (9 volts) pulldown resistors, 500 ohms when operating with a 78-ohm Ethernet trans- ceiver cable, and up to 1.5 kohms with an onboard transceiver for the Thin Net LAN cable. V.- Negative Supply. Nominally 9 volts refer- enced to COAX shield ground. TX Transmit Data Input. A balanced line re- ceiver input to the 83C92C from the MCC for transmit packets. HBE Heartbeat Enable. This inout enables the Collision (also called Heartbeat) Test when connected to ground or floating, and disables the test when connected to V,,. GND Ground. Ground is the positive supply for the 83C-92C, and connects to the network COAX shield. A 0.1 microfarad ceramic decoupling capacitor must be connected across ground and V., as close to the device as possible. A DC-DC power converter provides 9 volt power for the 83C92C, and DC isolation from the station equipmentto prevent ground loop cur- rent. Do not connect this ground to any station equip- ment power supply voltage or chassis ground, since the COAX shield must be isolated from the Station equipment. RR+ External Resistor. To set the internal current levels, connect a 1K 1% resistor across these pins. RR- connects to V,,. internally. 83C92C 14 RXI Network Signal Receiver. Connects to the network COAX center conductor, and receives packet daia and detects the collision voltage level. 15 TXO_ Network Signal Transmitter. Connects to the network COAX center conductor through an external 1N916 diode!", and transmits all sig- nals from the MCC to the network. 16 CDS Collision Detect Sense. Connects di- rectly to the network shield, and references the collision detection voltage level. Description of the 83C92C Functions The 83C92C has four main functions, as shown in the block diagram. These are the Transmitter; the Collision Detector; the Jabber Timer; and the Receiver. The Transmitter The Transmitter takes differential output signals from the MCC, and outputs these signals at the correct levels to the network. The transmit signal is sent to the 83C92C via a balanced differential pair (TX). A squelch circuit prevents the Transmitter Output from responding to noise on the TX + pair. The Transmitter has an open-drain current driver output using the V,., supply. Rise and fall times are controlled and set at 25 ns to lessen the higher harmonics. Drive current levels are set by a bandgap voltage refer- ence anda 1K resistor installedacross pins 11 and12. An external diode should be added to reduce COAX loading and capacitance to comply with the [SO and ANSIEEE specifications. 1. 1N916 diode or equivalent with low capacitance less than or equal to 1 pf value. This diode is needed for all 83C92C designs. SEEQ TXt TXO VTsq tTOFF 10% TID He tT, TRANSMIT ENABLE Lo Figure 3. Transmitter Timing Technology Incorporated MD400137/CThe transmit squelch circuit blocks signals with pulse widths less than 15 nanoseconds, (negative-going), or with levels of less than175 millivolts. The squelch circuits turn the Transmitter off at the end of a packet if the signal stays higher than175 millivolts for more than 190 nanos- econds. See Figure 3, the Transmitter Timing Diagram. The TXO signal is disabled when not transmitting to prevent noise onthe network. Ifthe COAX cable is shorted or open, no transmitted data appears on the Receiver input. This condition can be detected by the station equipment by running a loopback test. Collision Detection The Collision detector monitors the COAX Center Con- ductor and senses the voltage conditions created by a collision, where the COAX shield is used as areference. A collision condition can be detected when two or more Stations are transmitting, whether or not the local Trans- mitter is activated. This is called Receive Mode Collision Detection. The detector signals a collision by sending the 10 MHz oscillator signal through the Collision Pair (CD+) to the MCC. The HeartbeatTest is performed at the end of each transmitted data packet to verify the operation of the detector. A collision causes a 2.0 volt average DC level on the center conductor of the network cable. This level passes through a 4-pole Bessel low-pass filter for averaging. The resulting signal is measured by a voltage comparator against the threshold voitage V,, of about -1.5 volts. A collision is indicated when the center conductor average level is more negative than the CDS level by the threshold Vip: The line driver is enabied within 900 ns of the onset of the collision, and the 10 MHz signal is sent to the station equipment. 83C92C The HeartbeatTest is a short burst of the collision signal generated immediately after the transmission of a packet. This test enables the 10 MHz collision signal for about 1 microsecond starting about 1.1 microseconds after the end of transmission. The testcan be disabled for operation with repeaters by connecting the HBE pin to V,,. The Jabber Timer The Jabber Timer monitors the operation of the Transmit- ter. If the Transmitter operates continuously for more than 40 Milliseconds (typically), the Jabber Timer disables the Transmitter and enables the Collision Detector outputs. The Transmitter is automatically re-enabled after the sta- tion has been silent for 500 milliseconds. The Receiver The Receiver detects any signal on the COAX center conductor that triggers its squelch circuits, and sends the signal through a differential line driver to the MCC. The Receiver provides amplification and equalization; a squelch circuit prevents noise activating the Receiver circuits. See Figure 4. The receive signal goes through a buffer with a high input impedance and low capacitance to reduce loading and reflections on the network COAX. An equalizer passes high frequencies and attenuates low frequency signals from the network, flattening the network pass band. The Signal is output through a differential line driver presenting a balanced signal to the station. The line driver has 4 nanosecond rise and fall times. A 4-pole Bessel low-pass filter provides the average DC level from the received signal. It sends this level to the Collision Comparator and RX Squelch circuits. The squelch circuit activates the Receive Line Driver only when it detects a true signal. This prevents noise triggering the receiver. x DC THRESHOLD RX+ RECEIVER SQUELCH pox LOW-PASS vPass THRESHOLD RECEIVE ENABLE [ Figure 4. Receiver Timing SEEQ@ Technology Incorporated MD400137/CGND (+) 83C92C _ (-)9V DC (ISOLATED) _ ~*| peto pe VDC 4] CONVERTER [YEE : : Each ' Bi TRANSCEIVER | b> Ghete ror ETHERNET osc cp+) co-l px+) AXx-| | Vee NETWORK 500.0 EW COAX CENTER 7 Notes: 1.10M Q resistor is optional. 83C92C will assert collision si no transmit signal on TXO, with the 10 M Q resistor option. 83C92C designs. Figure 5. 83C92C Ethernet Trans Do-D7 z PG g3 CLK . g |cD+ to ep+|, 4 |CDS SHIELD penis | 8S LPBK 8 [co- T a 3IlE op-] 5 ie Lrxo || gg ing] CSN 380 O01): 1 AX], O y4{axi[[N COLL i% wry: ISOLATORS Vee|> & VEE oPu < lac |B 6[R2 te tive]? 3 "faa [RUKH = omall oO _ AAA AOASN | Za Too ue a 3lE px-]> '?fpae | ac p11 z6 6 " VEE Ee [xen 582 gg TX+ io [GND a3 2 6 i slg ; 8 CONTROL] GG [ryc+ ZO [RX Pog TX} g LHBE 2 Rx-, | po TxD cI 9.0 100 pH soa) jy 1% 1% 0.01 uF TX + TX gnal when COAX cable is disconnected even if there is 2. 1N916 diode or equivalent with low capacitance less than or equal to 1 pf value. This diode is needed for all ceiver System Connections When a packet is detected, the DC level from the Low-pass Filler becomes more negative than the DC squelch threshold, which is typically 250 mV DC and the Receiver turns on. The squelch circuit AC timing detects high level signals of more than 225 nanoseconds, and turns the Receiver off. The Receiver stays off if within 1 microsec- ond (typical) the low pass filter level becomes more posi- tive than the DC squeich threshold. See the Receiver Timing Diagram, Figure 4. The System Connections diagram shows the transceiver connections in a station environment. RXz+ and CD+ differential signals to the MCC are biased by 500-ohm pull- down resistors and are isolated from the MCC. For Thin Net applications where the 83C92C is located in the Station equipment, the pull-down resistors can be in- creased to 1.5 kohms, and the termination resistors omit- ted to save power. The DC supply is converted to 9V by a DC to DC converter. This converter also provides DC isolation between the +12 volt and 9 volt sides. The COAX center conductor connects to the Receive and Transmit pins of the transceiver. A 1N916 external diode minimizes network loading when power is on or off. COAX tap capacitance contributed by the 83C92C is less than 2 pF at 10 MHz, powered and unpowered, not transmitting. CDS, Collision Detection Sense detects the Collision reference level. This is ground-referenced sense pin. It should be connected directly to the COAX shield to pre- vent ground-loop interference. The Transceiver assembly includes the DC - DC Con- verter and the RX1, TX+ and CDz signal isolators. A Transceiver cable up to 50 meters (164 feet) long connects the MCC to the Transceiver assembly. These compo- nents are usually mounted on the computer adapter board in the Thin Net configuration, on a separate board for Ethernet configurations. See Figure 5. Reliability The 83C92C package will give one million hours Mean Time Between Failure (MTBF) under continuous opera- tion as defined by the IEEE 802.3 standard. SEEQ Technology Incorporated 5 MD400137/C CONDUCTOR83C92C Absolute Maximum Ratings (See Note 1) SUPPly VOltaGe (Veg) -eecececceseccececssesseeeenecnseseenecseceenecsecsecsecsecsecaeesensecaecesssaseceseeeaeeesenanaes 12V/ +0.3V Reverse Bias Package Power Rating at 25C ooo... eeceeceneeeennee ener eee eeaeeeeeeaeeeaeeeeeaaeeeesaaeeesaeeeesaeeeensaeeesneaeessieeeennaneeennaes 1.5 Watts (PC Board Mounted) Refer to the Pin Number Description Derate linearly at the rate of 28.6 mW/*G INPUt VOILAGS oe ee cee e tence eenee ee eee ee ee te teen eae ee ea geese tates eneae ee sa geeeeeaaeeeeeaaeesaaeeeeeaaeeseeeaeesneeeeenaeeesenaes +0.3V to V_, -0.3V Maximum I/O Current (RXI, CDS, HBE, RR+, RR, TX+, TX) 00... .eee cece cece eeccece eee eeeeeeeeeeeeseneaeeeeeeseaeaeeeeeeeee +10mA Maximum Current int0 TXO ooo... eeeeseeeeeeee ener eeeeaaeeeseeeeecaaeeeeeaaeeesaaaeesaaeeeseaaeeeseaaeeeseeeensaeeesnaeeesneeees +10mA/-100mA Maximum Current into CD+, CD oo... cccccccccccccececeeceeeeseseseeeeeeceesasnsaeaeaeaeeeeeeeeeeeeeseeseseseesesssseessneinanes +40mA/-10mA Absolute Maximum Voltage, RXI o.....eececceeesnereeenneeeeneee ence ee eeeeeeeeaeeeeeaeeeseeaeeesaeeeesaaeeeeeeaeeeneeeeenaeeesaes +0.3V/-12V Absolute Maximum Voltage, all pins except Vie, RXI oc ceeetetteteeeeerenees +0.3V above ground/-0.3V below V_, Electrostatic Discharge all pins [Except RXI pin (41600V min.)] (Human body model) ........ eee +2500V min. Latch-Up DC Current ...... eee esneeeeneeeenneeeeeaeeeeeneeeesaeeeenaaeeeeaeeeeeaaeeeenaaeeesneeesesaeeesnaaeeesneeeseseeeeseaeeetnaeess 100mA min. Storage TEMpPerature oo... eee cece eeesneeeeeeee cence eeeaeeeeeaaeeeaeeeeeaaeeeseaaeeseneeeeeaeeeesaeeeseeeeeesieeeensaeeesnnaes 65C to 150C Lead Temp. (Soldering, 10 SECONAS) ....... eee ceeeeee entre eeeeaeeeeeeeeeeaeeeeeaaeesaaeeeeesaeeeeeaaeeesaeeesnaeeesenaeessneeeensaeeeennaes 260C For actual power dissipation of the device, refer to Electrical Characteristics Table. NOTES 1. Absolute maximum ratings are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. SEEQ@ Technology Incorporated 6 MD400137/C83C92C Electrical Characteristics Vee = -9V 15%, T, = Commercial 0C to +70, (See Notes 1, 2 & 3) Symbol} Parameter Min Typ Max Units lees Supply Current Out of V.. PinNon Transmitting 55 -70 mA lee, Supply Current Out of V_. PinTransmitting 100 130 mA lave Receive Input Bias Current (RXI)! -2 -1 +25 HA loc Transmit Output DC Current Level (TXO) 37 41 45 mA lac Transmit Output AC Current Level (TXO) +28 Looe mA Vop Collision Threshold (Receive Mode)! 1.45 1.53 1.58 Vv Vop Differential Output Voltage (RX+, CD+)#! +550 +1200 mV Voc DG Gommon Mode Output Voltage (RX+, GD+)" -1.5 -2.0 -2.5 Vv Vos Idle State Differential Offset Voltage (RX+, CD+) +40 mV Von AC Common Mode Output +40 mV Voltage (RX+, CD+)"! Vasa Receiver DC Squelch Threshold (RXI) 150 250 350 mv Visa Transmitter Squelch Threshold (TX+) -175 225 300 mv C,, TAP Capacitance! 3.0 4.0 pF Ray) Shunt ResistanceNon Transmitting (RXI)! 100 KQ Rix Shunt ResistanceTransmitting(TXO)#! 4 10 KO Harmonic Content Relative to Fundamental Hoos Second and Third Harmonics 20 dB Hoss Fourth and Fifth Harmonics -30 dB Heg7 Sixth and Seventh Harmonics 40 dB NOTES 1. 2. 3. 4. SEEQ Voc has no impact on system performance, since the twisted pair is transformer - isolated. As required to meet ANSI/IEEE 802.3 and ISO 8802-3 specifications. All currents into device pins are positive, all currents out of device pins are negative. All voltages referenced to ground unless otherwise specified. Measured at RXI with a diode between TXO and RXI as shown in the recommended layout in Figure 5. The maximum diode capacitance is 1 pF. Guaranteed through characterization. . Current is measured on RX while first forcing O volt and measuring the current, and then forcing 2 volts and measuring the current. Thus: AV OV Al ~ [I @0V]-[|@-2V| . TXtis first set to 1 volt differential (DC voltage) to surpass the squelch level. Current is measured on TXO while first forcing 0 volt and measuring the current, and then forcing 2 volts and measuring the current. Calculation is the same as item 5 above. Technology Incorporated 7 MD400137/CRecommended Operating Conditions Supply Voltage (Veg) .-.cececcecccsecseseeseetecseeeeeees -9V + 5% Temperature Range (T,) COMMELCial ........eeeeteteteeteeeeteee eens 0 to +70C Switching Characteristics v,. = -9V 15%, T, = Commercial 0C to +70, (See Note 1) For Test Load Conditions and Parameters, refer to Figure 10. 83C92C Symbol Parameter Fig Min Typ Max Units tron Receiver Startup Delay (RXI to RX+)"! 4 4 5 bits teore Receiver High to Idle Time (RXI)*! 4 300 ns tea Receiver Propagation Delay (RXI to RX+) 4 15 50 ns te, Differential Outputs Rise Time (RX+, CD+) 4 4 7 ns tey Differential Outputs Fall Time (RX+,CD+) 4 4 7 ns te, Receiver & Cable Total Jitter (including diode) +2 +6 ns tist Transmitter Startup Delay (TX + to TXO)4! 3 1 2 bits tig Transmitter Propagation Delay (TX + to TXO) 3 15 25 50 ns tio Transmit Idle Delay (Transmit Current < 2mA)?! 3 400 ns t, Transmitter Rise Time 10% to 90% (TXO) 3 20 25 30 ns t, Transmitter Fall Time 90% to 10% (TXO) 3 20 25 30 ns to t,, and t,, Mismatch 0.5 +2.0 ns tis Transmitter Skew (TXO) +0.5 +1.0 ns tion Transmit Turn-On Pulse Width at V_., (TX+) 3 15 20 40 ns bore Transmit Turn-Off Pulse Width at V,,, (TX+)*) 3 130 175 200 ns toon Collision Turn-On Delay?! 6 7 13 bits toore Collision Turn-Off Delay 6 20 bits fon Collision Frequency (CD+)4 6 8.5 11.5 MHz top Collision Pulse Width (CD+)"! 6 35 70 ns taon CD Heartbeat Delay (TX+ to CD+) 7 0.6 1.6 ys tow CD Heartbeat Duration (CD+) 7 0.5 1.0 1.5 ys ty Jabber Activation Delay (TX+ to TXO and CD+)"! 8 20 40 60 ms tp Jabber Reset Timeout (TX+ to TXO and CD+) 8 250 500 750 ms NOTES 1. All typicals are given for V_. =9V and T, = 25C. 2. As required to meet ANSI/IEEE 802.3 and ISO 8802-3 specifications. 3. Time to detect end of packet. 4. f,. < 11.5 MHz at max. operating temp (70C), f SEEQ@ > "cD < 12.5 MHz at min operating temp (0C). Technology Incorporated 8 MD400137/C83C92C Timing and Load Diagrams INPUT STEP FUNCTION 3 * RXI 83C92C CD+ AW I COLLISION - i i DETECTOR OUTPUT C =510 pF i T i R AND C NETWORK SIMULATES WORST CASE CABLE 98% STEP RESPONSE RXI VCD (max) VCD (min) tCON tCOFF = YL or Figure 6. Collision Timing tHON L tHw <4 > > Figure 7. Heartbeat Timing os + yg, _+ Txo HELE Figure 8. Jabber Timing SEEQ Technology Incorporated 9 MD400137/C83C92C Timing and Load Diagrams (continued) e : wee ae ae a INPUT SIGNAL RXI] g3cg2c |_RX+ WITH 30ns RISE RECEIVER . AND FALL TIMES i OUTPUT , C=36 pF T : R AND C NETWORK SIMULATES WORST CASE CABLE JITTER ft tte Tes ras ety 2 ttry Input Jitter <+ ins RX+ Output Jitter < +7 ns Difference < +6 ns Figure 9. Receive Jitter Timing >_>, TRANSMIT OUTPUT RECEIVE (RX+ (TXO) . 252 OR sone COLLISON (CD+) 5109 5109 VEE VEE * The 50uH Inductance is for testing purposes. Pulse transformers with higher inductances are recommended (see Figure 5). Figure 10. Test Loads SEEQ@ Technology Incorporated 1 0 MD400137/Ced Package Type P = Plastic Dip N = Plastic Leaded Chip Carrier Revision History 4/23/96 83C92C N @Q s3cgz2 Tr Temperature Part Version Range Type Type Q = Commercial 0C to +70C 83C92C = Ethernet Transceiver Cc Figure 11. Ordering Information - Page 2; Figure 2. 20 Pin Plastic Leaded Chip Carrier: - This figure has been replaced with a new figure. - Page 11; Figure 11. Ordering Information: - This figure has been replaced with a new figure. 9/5/96 - Page 13; The dimension diagram on this page has changed, for more details call SEEQ Technology, (510) 226-7400 ext. 3051. 2/17/98 Document Revision Change to MD400137/C Global Change: All references to Extended Temperature Range 40C to +85C have been deleted. Global Change: All references to 83C92C is fully compatible with ANSI/IEEE 802.3 and 8802-3, has been changed to 83C92C is compatible with ANSIIEEE 802.3 and 8802-3. Page 2: Figure 83C92C Ethernet Transceiver Pin Configuration; - 20 Pin Plastic Leaded Chip Carrier has been deleted. Page 7: Electrical Characteristics; EE2 ( MAX) has been changed from -120 to 130. - Vep (MIN) has been changed from 1.49 to 1.45. SEEQ Technology Incorporated MD400137/C 1183C92C Revision History Page 8: Switching Characteristics - f,, Parameter, Collision Frequency (CD+) has been changed to Collision Frequency (CD+)! - Addition of Note 4; f,,, < 11.5 MHz at max. operating temp (70C), f,, < 12.5 MHz at min operating temp (0C). Page 11: Figure 11. Ordering Information; - Reference to 20 Pin PLCC has been deleted. - Reference to IEEE 802.3 has been deleted Page 12: Pagination Change Page 14: 20 Pin PLCC Dimension Diagram has been deleted. SEEQ@ Technology Incorporated 1 2 MD400137/C +e PIN NO. 4 .090 (2.29) .040 (1.02) .780 (19.81) .200 (5.08) MAX * 730 (18.54) BASE PLANE Vo t SEATING __} PLANE 015 (0.38) MIN 4 013 (0 165 (4 008 (0 PIN NO. 1 065 ( 110 (2.79) 125.0 19 04s (1 .090 (2.29) .040 (1. st) 021 ( .020 ( 015 (0 SEEQ OUTLINE P008/ NOTES 1. All dimensions are in inches and (millimeters). 2. Dimensions do not include mold flash. Maximum allowable mold flash is .010 (.25). 3. Dimension is measured from shoulder to shoulder. 4. Tolerances are + .010 (.25) unless otherwise specified. 5. For solder dipped leads, thickness will be .020 (.51) max. PLASTIC DUAL-IN-LINE PACKAGES 16 LEAD (.300 CENTER) PLASTIC DIP PACKAGE TYPE P 83C92C 325 (8.26) 300 (7.62) _- 280 (7.11) 220 (5.59) ~_? _ ; ot 300 (7.62) BSC SEEQ Technology Incorporated 1 3 MD400137/CSURFACE MOUNT PACKAGES 28-PIN PLASTIC LEADED CHIP CARRIER TYPE N 048 (1.22) x 45 PIN NO. 1 IDENTIFIER ii Thang hay Th .300 (7.62) REF .050 (1.27) BSC E 83C92C im aE .056 (1.42) 042 (1.07) 042 (1.07) x *~ Nee 1 x ime SS Citi) 4 H c= 495 (12.57) CU | a 485 (12.32) 0 5 300 (7-82) =F CO | al 456 (11.58) | 450 (11.43) L | UO ] 4 | LIT LILI LI LILI Ld 456 (11.58) 450 (11.43) - 495 (12.57) 485 (12.32) + 180 (4.57) tr 165 (4.19) 110 (2.79) .099 (2.52) NOTES 1. All dimensions are in inches and (millimeters). 2. Dimensions do not include mold flash. Maximum allowable flash is .008 (.20). 3. Formed leads shall be planar with respect to one another within 0.004 inches. 024 (59) be 013 (.3 R .045 (1. R .025 (.6 430 (10.92) .390 (9.91) 14 4) ) AY 0103 (0.261) lyf 0097 (0.246) .020 (.51) Min. SEEQ@ Technology Incorporated MD400137/C 14