ds8935 National Semiconductor Corporation, ds8935 Datasheet

no-image

ds8935

Manufacturer Part Number
ds8935
Description
Localtalk? Dual Driver/triple Receiver
Manufacturer
National Semiconductor Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ds8935WMX
Manufacturer:
NSC
Quantity:
1 000
Part Number:
ds8935WMX
Manufacturer:
NS/国半
Quantity:
20 000
© 1998 National Semiconductor Corporation
DS8935
LocalTalk
General Description
The DS8935 is a dual driver/triple receiver device optimized
to provide a single chip solution for a LocalTalk Interface.
The device provides one differential TIA/EIA-422 driver, one
TIA/EIA-423 single ended driver, one TIA/EIA-422 receiver
and two TIA/EIA-423 receivers, all in a surface mount 16-pin
package. This device is electrically similar to the 26LS30 and
26LS32 devices.
The drivers feature
ferential driver provides TRI-STATEable outputs. The receiv-
ers offer
range.
Connection Diagram
TRI-STATE
LocalTalk
®
is a trademark of Apple Computer, Inc.
±
is a registered trademark of National Semiconductor Corporation.
200 mV thresholds over the
See NS Package Number M20B
Order Number DS8935WM
Dual-In-Line Package
±
10V common mode range, and the dif-
Dual Driver/Triple Receiver
±
DS012066-1
10V common mode
DS012066
The device offers enable circuitry for the differential driver
and selectable enabling for the three receivers.
Features
n Single chip solution for LocalTalk port
n Two driver/three receivers per package
n Wide common mode range:
n
n 70 mV typical receiver input hysteresis
n Available in SOIC packaging
n Failsafe receiver for open inputs
Functional Diagram
±
200 mV receiver sensitivity
±
10V
February 1996
DS012066-2
www.national.com

Related parts for ds8935

ds8935 Summary of contents

Page 1

... LocalTalk Dual Driver/Triple Receiver ™ General Description The DS8935 is a dual driver/triple receiver device optimized to provide a single chip solution for a LocalTalk Interface. The device provides one differential TIA/EIA-422 driver, one TIA/EIA-423 single ended driver, one TIA/EIA-422 receiver and two TIA/EIA-423 receivers, all in a surface mount 16-pin package ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Supply Voltage ( Enable Input Voltage ( EN1 ...

Page 3

Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified Symbol Parameter RECEIVER CHARACTERISTICS V Input Threshold TH V Hysteresis HY R Input Resistance IN Input Current (Other Input = 0V 0V) Power ...

Page 4

Switching Characteristics Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified Symbol Parameter RECEIVER CHARACTERISTICS t Disable Time High Disable Time Low Enable Time Z to High ZH t Enable Time ...

Page 5

Parameter Measurement Information FIGURE 1. Differential Driver DC Test Circuit FIGURE 2. Single Ended Driver DC Test Circuit FIGURE 3. Differential Driver Propagation Delay and Transition Time Test Circuit FIGURE 4. Differential Driver Propagation Delay and Transition Time Waveforms FIGURE ...

Page 6

Parameter Measurement Information FIGURE 6. Single Ended Driver Propagation Delay and Transition Time Waveform FIGURE 7. Differential Driver TRI-STATE Test Circuit FIGURE 8. Differential Driver TRI-STATE Waveforms FIGURE 9. Receiver Propagation Delay Test Circuit FIGURE 10. Receiver Propagation Delay Waveform ...

Page 7

Parameter Measurement Information FIGURE 11. Receiver TRI-STATE Delay Waveform Note 4: Generator waveform for all tests unless otherwise specified 500 kHz, Z Note 5: C includes probe and jig capacitance. L Note 6: All diodes are 1N916 or ...

Page 8

... Negative Power Supply Pin, − Positive Power Supply Pin, +5V CC DRIVER OUTPUT WAVEFORMS The driver configuration on the DS8935 is unique among TIA/EIA-422 devices in that it utilizes −5V V cal TIA/EIA-422 driver uses +5V only and generates signal swings of approximately 0V–5V. By utilizing V , the differential driver is able to generate a EE much larger differential signal ...

Page 9

... The additional resistance is typical of applications requiring EMI filtering on the driver outputs. TWO-WIRE LocalTalk The DS8935 is a single chip solution for a LocalTalk inter- face. A typical application is shown in Figure alternative implementation of LocalTalk is to only use two wires to communicate. The differential data lines can be transformer-coupled twisted pair medium ...

Page 10

... Typical Application Information Typical Performance Characteristics The DS8935 is very closely related to the DS8925. Please refer to the DS8925 datasheet for the typical performance character- istics. www.national.com (Continued) DS012066-48 FIGURE 15. Driver Output Structure FIGURE 16. Receiver Input Structure 10 DS012066-49 ...

Page 11

11 ...

Page 12

... Italiano National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. Order Number DS8935WM NS Package Number M20B 2. A critical component in any component of a life support ...

Related keywords