Document
DS3884A BTL Handshake Transceiver
August 2000
DS3884A BTL Handshake Transceiver
General Description
The DS3884A is one in a series of transceivers designed specifically for the implementation of high performance Futurebus+ and proprietary bus interfaces. The DS3884A is a BTL 6-bit Handshake Transceiver designed to conform to IEEE 1194.1 (Backplane Transceiver Logic — BTL) as specified in the IEEE 896.2 Futurebus+ specification. n n n n n n n Glitch free power-up/down protection Typically less than 5 pF bus-port capacitance Low Bus-port voltage swing (typically 1V) at 80 mA TTL compatible driver and control inputs Separate TTL I/O Open collector bus-port outputs allow Wired-OR connection Controlled rise and fall time to reduce noise coupling to adjacent lines Built in Bandgap reference with separate QV CC and QGND pins for precise receiver thresholds Exceeds 2 kV ESD testing (Human Body Model) Individual Bus-port ground pins Product offered in PQFP package styles
Features
Fast propagation delay (3 ns typ) 6-bit BTL transceiver Selective receiver glitch filtering (FR1–FR3) Meets 1194.1 Standard on Backplane Transceiver Logic (BTL) n Supports live insertion n n n n n n n n
Connection Diagram
DS011460-1
Order Number DS3884AVF See NS Package VF44B
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© 2000 National Semiconductor Corporation
DS011460
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DS3884A
Logic Diagram
DS011460-3
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2
DS3884A
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Control Input Voltage Driver Input and Receiver Output Receiver Input Current Bus Termination Voltage Power Dissipation at 25˚C PQFP 6.5V 6.5V 5.5V ± 15 mA 2.4V 1.3W
Derate PQFP Package Storage Temperature Range Lead Temperature (Soldering, 4 seconds):
11.1 mW/˚C −65˚C to +150˚C 260˚C
Recommended Operating Conditions
Supply Voltage, VCC Bus Termination Voltage (VT) Operating Free Air Temperature 4.5V–5.5V 2.06V–2.14V 0˚C to 70˚C
DC Electrical Characteristics (Notes 2, 3)
TA = 0 to +70˚C, V Symbol VIH VIL II IIH IIL VCL VOLB IOLBZ IOHBZ IOLB IOHB VTH VCLP VCLN VOH VOL IOS ICC ILI
CC
= 5V ± 10% Conditions Min 2.0 0.8 VIN = V
CC
Parameter Minimum Input High Voltage Maximum Input Low Voltage Input Leakage Current Input High Current Input Low Current Input Diode Clamp Voltage Output Low Bus Voltage (Note 5) Output Low Bus Current Output High Bus Current Output Low Bus Current Output High Bus Current Receiver Input Threshold Positive Clamp Voltage Negative Clamp Voltage Voltage Output High Voltage Output Low Output Short Circuit Current Supply Current: Includes VCC, QVCC and LI Live Insertion Current
Typ
Max
Units V V µA µA µA V V µA µA µA µA V V V V V
DRIVER AND CONTROL INPUT: (Dn, DE*, PS1 and PS2)
= 5.5V
100 40 −100 −1.2 0.75 1.0 1.1 100 100 220 350 1.47 2.4 2.9 1.55 3.4 3.9 1.