Homedatasheet54ACQ245D

54ACQ245D Datasheet

Quiet Series Octal Bidirectional Transceiver With Tri-state Inputs/outputs
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Description

Features, Applications
54ACQ245 54ACTQ245 Quiet Series Octal Bidirectional Transceiver with TRI-STATE Inputs/Outputs
54ACQ245 54ACTQ245 Quiet Series Octal Bidirectional Transceiver with TRI-STATE � Inputs/Outputs

The 'ACQ/'ACTQ245 contains eight non-inverting bidirectional buffers with TRI-STATE outputs and is intended for bus-oriented applications. Current sinking capability mA at both the A and B ports. The Transmit/Receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active-HIGH) enables data from A ports to B ports; Receive (active-LOW) enables data from B ports to A ports. The Output Enable input, when HIGH, disables both A and B ports by placing them in a HIGH Z condition. The 'ACQ/'ACTQ utilizes NSC Quiet Series technology to guarantee quiet output switching and improve dynamic threshold performance. FACT Quiet SeriesTM features GTOTM output control and undershoot corrector in addition to a split ground bus for superior performance.

Features

n ICC and IOZ reduced 50% n Guaranteed simultaneous switching noise level and dynamic threshold performance n Improved latch-up immunity n TRI-STATE outputs drive bus lines or buffer memory address registers n Outputs source/sink mA n Faster prop delays than the standard 4 kV minimum ESD immunity ('ACQ) n Standard Military Drawing (SMD) 'ACQ245: 5962-92177

Description

Transmit/Receive Input Side A TRI-STATE Inputs or TRI-STATE Outputs Side B TRI-STATE Inputs or TRI-STATE Outputs

GTOTM is a trademark of National Semiconductor Corporation. TRI-STATE is a registered trademark of National Semiconductor Corporation. FACT is a registered trademark of Fairchild Semiconductor Corporation. FACT Quiet SeriesTM is a trademark of Fairchild Semiconductor Corporation.

Inputs L H T/R H X Bus B Data to Bus A Bus A Data to Bus B HIGH-Z State Outputs
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Diode Current (IIK) VI = VCC 0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = VCC 0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND) Storage Temperature (TSTG) DC Latch-Up Source or Sink Current Junction Temperature (TJ) CDIP -0.5V to VCC -0.5V to VCC + 0.5V

Supply Voltage (VCC) 'ACQ 'ACTQ Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) 54ACQ/ACTQ Minimum Input Edge Rate V/t 'ACQ Devices VIN from 70% of VCC 4.5V, 5.5V Minimum Input Edge Rate V/t 'ACTQ Devices VIN from to 2.0V VCC 0V to VCC 0V to VCC to +125�C

Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. National does not recommend operation of FACT � circuits outside databook specifications.

Symbol Parameter VCC (V) VIH Minimum High Level Input Voltage VIL Maximum Low Level Input Voltage VOH Minimum High Level Output Voltage to +125�C Guaranteed Limits (Note 2) VIN = VIL or VIH 4.5 5.5 VOL Maximum Low Level Output Voltage (Note 2) VIN = VIL or VIH 4.5 5.5 IIN Maximum Input Leakage Current V �A IOL VI = VCC, GND (Note 4) V IOH -24 mA IOUT �A V IOUT �A V VOUT 0.1V or VCC 0.1V V VOUT 0.1V or VCC - 0.1V Units Conditions


Features

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