INTEGRATED CIRCUITS 74F3893 Quad futurebus backplane transceiver Product specification IC15 Data Handbook 1991 Jan 18 Philips Semiconductors Product specification Quad Futurebus backplane transceiver FEATURES 74F3893 much less for BTL, so is its receiver threshold region, therefore noise margins are excellent. • Quad backplane transceiver • Drives heavily loaded backplanes with equivalent load BTL offers low power consumption, low ground bounce, EMI and crosstalk, low capacitive loading, superior noise margin and low propagation delays. This results in a high bandwidth, reliable backplane. impedances down to 10 ohms • Futurebus drivers sink 100mA • Reduced voltage swing (1 volt) produces less noise and The 74F3893 has four TTL outputs (Rn) on the receiver side with a common receiver enable input (RE). It has four data inputs (Dn) which are also TTL. These data inputs are NANDed with the data enable input (DE). The four I/O pins (bus side) are futurebus compatible, sink a minimum of 100mA, and are designed to drive heavily loaded backplanes with load impedances as low as 10 ohms. All outputs are designed to be glitch–free during power up and down. reduces power consumption • High speed operation enhances performance of backplane buses and facilitates incident wave switching • Compatible with IEEE 896 and IEEE 1194.1 Futurebus Standards • Built–in precision band–gap (BG) reference provides accurate receiver thresholds and improved noise immunity • Glitch–free power up/power down operation on all outputs • Pin and function compatible with NSC DS3893 TYPE DESCRIPTION TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT( TOTAL) 3.0ns 55mA 74F3893 The 74F3893 is a quad backplane transceivers and is intended to be used in very high speed bus systems. ORDERING INFORMATION The 74F3893 interfaces to ‘Backplane Transceiver Logic’ (BTL). BTL features a reduced (1V to 2V) voltage swing for lower power consumption and a series diode on the drivers to reduce capacitive loading (< 5pF). DESCRIPTION Incident wave switching is employed, therefore BTL propagation delays are short. Although the voltage swing is ORDER CODE COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 20-pin PLCC N74F3893A PKG DWG # SOT380-1 INPUT AND OUTPUT LOADING AND FAN OUT TABLE PINS D0 – D3 74F (U.L.) HIGH/LOW DESCRIPTION Data inputs 1.0/0.067 LOAD VALUE HIGH/LOW 20µA/40µA DE Data enable input 1.0/0.33 20µA/200µA RE Receiver enable input 1.0/0.067 20µA/40µA I/O0 – I/O3 Bus inputs 5.0/0.033 100µA/20µA I/O0 – I/O3 Bus outputs OC/166.7 OC/100mA 150/40 3mA/24mA R0 – R7 Receiver outputs Notes to input and output loading and fan out table One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6mA in the low state. OC= Open collector. January 18, 1991 2 853-1397 01496 Philips Semiconductors Product specification Quad Futurebus backplane transceiver 74F3893 PIN CONFIGURATION FUNCTION TABLE BG BUS D0 VCC GND GND R0 3 2 1 20 INPUT/ OUTPUT OUTPUT OPERATING Dn I/On Rn MODE INPUTS 19 D1 4 18 I/O0 DE RE R1 5 17 I/O1 H L L H L LOGIC GND 6 16 BUS GND H L H L H D2 7 15 I/O2 H H Dn Dn Z Receiver 3–state, R2 8 14 I/O3 L H X H Z transmit to bus L L X H L Receive, I/On = inputs L L X L H PLCC 9 10 D3 11 12 R3 DE 13 RE BUS GND SF00573 Notes to function table 1. H = High voltage level 2. L = Low voltage level 3. X = Don’t care 4. Z = High impedance ”off” state LOGIC SYMBOL 2 4 7 LOGIC DIAGRAM 9 D0 D0 D1 D2 D3 11 DE 12 RE R0 D1 I/O0 I/O1 1/O2 I/O3 17 15 14 3 5 8 D2 10 R2 VCC = Pin 1 LOGIC GND = Pin 6 BUS GND = Pin 13, 16, 19 BG GND = Pin 20 IEC/IEEE SYMBOL 12 2 4 7 EN1 EN2 1D 2 3 18 5 17 7 15 9 9 14 SF00575 January 18, 1991 18 I/O0 3 4 17 I/O1 5 12 7 15 RE I/O2 8 SF00574 D3 11 2 R0 R1 R2 R3 R1 18 VCC = Pin 1, LOGIC GND = Pin 8 BUS GND = Pin 13, 16, 19 BG GND = Pin 20 Transmit to bus 3 9 10 R3 11 DE 14 I/O3 SF00576 Philips Semiconductors Product specification Quad Futurebus backplane transceiver 74F3893 ABSOLUTE MAXIMUM RATINGS (Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free air temperature range.) SYMBOL PARAMETER RATING UNIT VCC Supply voltage –1.5 to +6.5 V VIN Input voltage –1.5 to +6.5 V IIN Input current –30 to +5 mA VOUT Voltage applied to output in high output state –0.5 to 5.5 V IOUT Current applied to output in low output state 200 mA Tamb Operating free air temperature range 0 to +70 °C Tstg Storage temperature range –65 to +150 °C RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL PARAMETER MIN NOM MAX UNIT 4.5 5.0 5.5 V VCC Supply voltage VIH High–level input voltage VIL Low–level input voltage 0.8 V IIk Input clamp current –18 mA VTH Bus input threshold I/On only 1.625 mA IOH High–level output current Rn only –3 mA IOL Low–level output current 100 mA Tamb Operating free air temperature range +70 °C January 18, 1991 Dn, DE, RE 2.0 1.475 0 4 V 1.55 Philips Semiconductors Product specification Quad Futurebus backplane transceiver 74F3893 DC ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range unless otherwise noted.) PARAMETER SYMBOL TEST LIMITS CONDITIONS1 IOH High–level output current VOH High-level output voltage VOHB High-level output bus voltage VOL Low-level output voltage VOLB Low-level output Driver output positive UNIT TYP2 MAX 10 100 µA I/On VCC = MAX, VIL = MAX, VIH = MIN, VOH = 1.5V Rn VCC = MAX, VIL = 1.3V, RE = 0.8V, IOH = MAX 2.5 V VCC = MAX, Dn = DE = 0.8V, VT = 2.0V, RT = 10Ω, RE = 2.0V 2.5 V I/On Rn VCC = MIN, VIN = 1.8V, RE = 0.8V, IOL = 6mA I/On bus voltage VOCB MIN I/On 0.35 0.5 V Dn = DE = VIH, IOL = 100mA 0.75 1.0 1.2 V Dn = DE = VIH, IOL = 80mA 0.75 1.0 1.1 V VCC = MAX or 0V, I/On = 1mA 1.9 2.9 V clamp voltage Dn = DE = 0.8V, RE = 2.0V I/On = 10mA 2.3 3.2 V VIK Input clamp voltage VCC = MIN, II =IIK -1.2 V II Input current at maximum input voltage VCC = MAX, VI = 7.0V, DE = RE = Dn = VCC 100 µA IIH High–level input current VCC = MAX, DE = RE = Dn =5.5V 20 µA VCC = 0V, Dn = DE = 0.8V, I/On =1.2V, RE = 0V 100 µA VCC = MAX, VI = 0.5V, DE = 4.5V VCC = MAX, VI = 0.5V, Dn = 4.5V VCC = MAX, Dn = DE = 0.8V, I/On =0.75V, RE = 0V –40 –200 µA µA 20 µA VCC = MAX, VI = 2.7V, RE = 2V 20 µA VCC = MAX, VI = 0.5V, RE = 2V –20 µA -150 mA Dn, RE, DE IIL High–level I/O bus current (power off) Low–level input current IILB Low–level I/O bus current (power on) I/On IOZH Off–state output current, high–level voltage applied Rn IOZL Off–state output current, low–level voltage applied IOS Short circuit output current3 IIHB current4 I/On Dn, RE DE Rn ’F8 VCC = MAX –0.73 –20 -60 ICC Supply (total) VCC = MAX, (RE = VIH or VIL) 55 80 mA Notes to DC electrical characteristics 1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type. 2. All typical values are at VCC = 5V, Tamb = 25°C. 3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any sequence of parameter tests, IOS tests should be performed last. January 18, 1991 5 Philips Semiconductors Product specification Quad Futurebus backplane transceiver 74F3893 AC ELECTRICAL CHARACTERISTICS FOR DRIVER AND DRIVER ENABLE LIMITS Tamb = +25°C SYMBOL PARAMETER TEST CONDITION Tamb = 0°C to +70°C VCC = +5.0V CD = 50pF, RT = 10Ω VCC = +5.0V ± 10% UNIT CD= 50pF, RT = 10Ω MIN TYP MAX MIN MAX Waveform 1 1.0 1.5 2.0 3.0 5.0 5.5 1.0 1.5 5.5 6.0 ns Propagation delay DE to I/On Waveform 1 1.0 1.5 2.0 3.0 4.5 5.5 1.0 1.5 5.5 6.0 ns tTLH tTHL Dn to I/O transition time 10% to 90%, 90% to 10% Waveform 1 1.0 1.0 4.0 4.0 1.0 1.0 5.0 5.0 ns tsk(o) Skew between drivers in same package tPLH tPHL Propagation delay Dn to I/On tPLH tPHL 1.0 ns AC ELECTRICAL CHARACTERISTICS FOR RECEIVER LIMITS Tamb = +25°C SYMBOL tPLH tPHL PARAMETER Propagation delay I/On to Rn TEST CONDITION Waveform 2 Tamb = 0°C to +70°C VCC = +5.0V CL = 50pF, RL = 1kΩ VCC = +5.0V ± 10% UNIT CL = 50pF, RL = 1kΩ MIN TYP MAX MIN MAX 1.0 3.6 2.0 5.5 4.5 7.5 1.0 3.6 5.5 8.5 ns AC ELECTRICAL CHARACTERISTICS FOR RECEIVER ENABLE A PORT LIMITS Tamb = +25°C SYMBOL PARAMETER TEST CONDITION Tamb = 0°C to +70°C VCC = +5.0V CL = 50pF, RL = 500Ω VCC = +5.0V ± 10% UNIT CL = 50pF, RL = 500Ω MIN TYP MAX MIN MAX tPZH tPZL Output enable time to high or low level, RE to Rn Waveform 3, 4 1.5 2.5 3.0 4.0 5.5 7.0 1.5 2.0 6.0 7.5 ns tPHZ tPLZ Output disable time from high or low level, RE to Rn Waveform 3, 4 1.5 1.5 3.0 3.0 5.5 5.5 1.0 1.0 6.5 6.0 ns January 18, 1991 6 Philips Semiconductors Product specification Quad Futurebus backplane transceiver 74F3893 AC WAVEFORMS DE, Dn VM tPHL 90% tTLH 10% 90% tTHL VM 1V 10% VM tPZH tPLH 2V I/On VM RE VM VM VOH -0.3V tPHZ Rn VM 0V SF00579 SF00577 Waveform 3. 3–state output enable time to high level and output disable time from high level Waveform 1. Propagation delay for driver 2V VM RE I/On VM VM VM tPZL 1V tPHL tPLZ tPLH VM Rn Rn VM VM VOL +0.3V SF00580 SF00578 Waveform 4. 3-state output enable time to low level and output disable time from low level Waveform 2. Propagation delay for receiver Notes to AC waveforms 1. For all waveforms, VM = 1.5V. 2. The shaded areas indicate when the input is permitted to change for predictable output performance. TEST CIRCUITS AND WAVEFORMS SWITCH POSITION TEST SWITCH tPLZ, tPZL closed All other open 7.0V VIN NEGATIVE PULSE 90% VM AMP (V) VM 10% RL VOUT PULSE GENERATOR tw 90% VCC 10% tTHL (tf ) tTLH (tr ) tTLH (tr ) tTHL (tf ) Low V D.U.T. RT CL RL Test circuit for 3–state outputs on D port AMP (V) 90% 90% POSITIVE PULSE VM VM 10% 10% tw 7.0V VCC Low V Input pulse definition VIN RT VOUT PULSE GENERATOR INPUT PULSE REQUIREMENTS D.U.T. family VM rep. rate 1.5V 1MHz 500ns 2.5ns 2.5ns I/O port 2.0V 1MHz 1.0V 1.5V Test circuit for outputs on I/O port DEFINITIONS: RL = Load resistor; see AC electrical characteristics for value. CL = Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value. RU = Pull up resistor; see AC Electrical Characteristics for value. CD = Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value. RT = Termination resistance should be equal to ZOUT of pulse generators. 500ns 4.0ns 4.0ns amplitude Low V RT January 18, 1991 CD D port 7 3.0V 0.0V tw tTLH tTHL SF00581 Philips Semiconductors Product specification Quad futurebus backplane transceiver 74F3893 PLCC20: plastic leaded chip carrier; 20 leads 1991 Jan 18 SOT380-1 8 Philips Semiconductors Product specification Quad futurebus backplane transceiver 74F3893 NOTES 1991 Jan 18 9 Philips Semiconductors Product specification Quad futurebus backplane transceiver 74F3893 Data sheet status Data sheet status Product status Definition [1] Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make chages at any time without notice in order to improve design and supply the best possible product. Product specification Production This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. [1] Please consult the most recently issued datasheet before initiating or completing a design. Definitions Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Disclaimers Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 print code Document order number: yyyy mmm dd 10 Date of release: 10-98 9397-750-05206