DS26S10 Quad Bus Transceiver General Description The DS26S10 is a quad Bus Transceiver consisting of 4 high speed bus drivers with open-collector outputs capable of sinking 100 mA at 0.8V and 4 high speed bus receivers. Each driver output is connected internally to the high speed bus receiver in addition to being connected to the package pin. The receiver has a Schottky TTL output capable of driving 10 Schottky TTL unit loads. An active low enable gate controls the 4 drivers so that outputs of different device drivers can be connected together for party-line operation. The bus output high-drive capability in the low state allows party-line operation with a line impedance as low as 100Ω. The line can be terminated at both ends, and still give considerable noise margin at the receiver. The receiver typical switching point is 2V. The DS26S10 features advanced Schottky processing to minimize propagation delay. The device package also has 2 ground pins to improve ground current handling and allow close decoupling between VCC and ground at the package. Both GND 1 and GND 2 should be tied to the ground bus external to the device package. Features n n n n n Input to bus is inverting on DS26S10 Quad high speed open-collector bus transceivers Driver outputs can sink 100 mA at 0.8V maximum Advanced Schottky processing PNP inputs to reduce input loading Logic Diagrams DS2610 DS005802-1 © 1999 National Semiconductor Corporation DS005802 www.national.com DS26S10 Quad Bus Transceiver May 1999 Absolute Maximum Ratings (Note *NO DC Input Current −30 mA to +5 mA Maximum Power Dissipation (Note 1) at 25˚C Molded Package 1362 mW TARGET FOR FNXref NS859*) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Temperature (Ambient) Under Bias Supply Voltage to Ground Potential DC Voltage Applied to Outputs for High Output State DC Input Voltage Output Current, Into Bus Output Current, Into Outputs (Except Bus) Operating Conditions −65˚C to +150˚C −55˚C to +125˚C −0.5V to +7V −0.5V to +VCC Max Supply Voltage (VCC) DS26S10 Temperature (TA) DS26S10 Min Max Units 4.75 5.25 V 0 +70 ˚C Note 1: Derate cavity package 9.6 mW/˚C above 25˚C; derate molded package 10.9 mW/˚C above 25˚C, derate PLCC package TBD mW/˚C above 25˚C. −0.5V to +5.5V 200 mA 30 mA Electrical Characteristics (Unless otherwise noted) Symbol Parameter Conditions Min (Note 2) VOH VIH VIL VI Max Units Output Low Voltage VCC = Min, IOH = −1 mA, VIN = VIL or VIH VCC = Min, IOL = 20 mA, (Receiver Outputs) VIN = VIL or VIH Input High Level Guaranteed Input Logical High for (Except Bus) All Inputs Input Low Level Guaranteed Input Logical Low for 0.8 V (Except Bus) All Inputs VCC = Min, IIN = −18 mA −1.2 V Output High Voltage (Receiver Outputs) VOL Typ (Note 3) Input Clamp Voltage Military 2.5 3.4 V Commercial 2.7 3.4 V 0.5 2.0 V V (Except Bus) IIL Input Low Current VCC = Max, VIN = 0.4V (Except Bus) IIH Input High Current VCC = Max, VIN = 2.7V (Except Bus) II Input High Current Enable −0.36 mA Data −0.54 mA Enable 20 µA Data 30 µA 100 µA VCC = Max, VIN = 5.5V (Except Bus) ISC Output Short-Circuit Current VCC = Max, (Note 4) (Except Bus) ICCL Power Supply Current VCC = Max, Enable = GND (All Bus Outputs Low) www.national.com Military −20 −55 mA Commercial −18 −60 mA DS26S10 DS26S11 2 45 70 mA 80 mA Connection Diagram Dual-In-Line Package DS005802-3 Top View Order Number DS26S10N See NS Package Number N16A Plastic Chip Carrier 3 www.national.com Bus Input/Output Characteristics Symbol Parameter Output Low Voltage VOL VCC IO Bus Leakage Current Conditions (Note 2) IOL = 40 mA = Min IOL = 70 mA VCC = Max Min Typ(Note 3) IOL = 100 mA VO = 0.8V 0.33 0.5 0.42 0.05 0.51 0.8 −50 VO = 4.5V IOFF Bus Leakage Currrent (power OFF) VO = 4.5V VTH Receiver Input High Threshold VTL Receiver Input Low Threshold Bus enable = 2.4V VCC = Max Bus enable = 2.4V VCC = Min Max 100 100 2.25 2.0 2.0 Units V µA µA V 1.75 Note 2: For conditions shown as min or max, use the appropriate value specified under Electrical Characteristics for the applicable device type. Note 3: Typical limits are at VCC = 5V, 25˚C ambient and maximum loading. Note 4: Not more than one output should be shorted at a time. Duration of the short circuit test should not exceed one second. Switching Characteristics (TA = 25˚C, VCC = 5V) Symbol Parameter tPLH Data Input to Bus tPHL Data Input to Bus tPLH Enable Input to Bus tPHL Enable Input to Bus Conditions RB = 50Ω, CB = 50 pF (Note 5) Min DS26S10 DS26S10 tPLH Bus to Receiver Out tPHL Bus to Receiver Out RB = 50Ω, RL = 280Ω, CB = 50 pF(Note 5) CL = 15 pF tr Bus RB = 50Ω, CB = 50 pF (Note 5) tf Bus Note 5: Includes probe and jig capacitance. Truth Tables DS26S10 Inputs Outputs E I B L L H L L H L H H X Y Y Z H = High voltage level L = Low voltage level X = Don’t care Y = Voltage level of bus (assumes control by another bus transceiver) www.national.com 4 Typ Max Units 10 15 ns 10 15 ns 14 18 ns 13 18 ns 10 15 ns 10 15 ns 4.0 10 ns 2.0 4.0 ns Typical Application DS005802-5 AC Test Circuit and Switching Time Waveforms DS005802-6 Note 1: Includes probe and jig capacitance. DS005802-7 5 www.national.com Typical Performance Characteristics Typical Bus Output Low Voltage vs Ambient Temperature Receiver Threshold Variation vs Ambient Temperature DS005802-8 DS005802-9 Schematic Diagram DS005802-10 VCC = Pin 16 GND 1 = Pin 1 GND 2 = Pin 8 Connect for DS26S10 *Remove R1, Q1, D1 for DS26S10 www.national.com 6 DS26S10 Quad Bus Transceiver Physical Dimensions inches (millimeters) unless otherwise noted Molded Dual-In-Line Package (N) Order Number DS26S10N NS Package Number N16A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. 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