Datasheet

ManualsBrandsFAIRCHILD SEMICONDUCTOR ManualsLogic ICsLogic IC - Receiver, transceiver TSSOP 48

August 1998

Revised June 2005

Resistors in the Outputs

Print form created on June 10, 2005 12:56 pm

74LCXR162245

Low Voltage 16-Bit Bidirectional Transceiver

with 5V Tolerant Inputs/Outputs

and 26: Series Resistors in the Outputs

General Description

The LCXR162245 contains sixteen non-inverting bidirec-

tional buffers with 3-STATE outputs and is intended for bus

oriented applications. The device is designed for low volt-

age (2.5V or 3.3V) V

applications with capability of inter-

facing to a 5V signal environment. The device is byte

controlled. Each byte has separate control inputs which

could be shorted together for full 16-bit operation. The T/R

inputs determine the direction of data flow through the

device. The OE

inputs disable both the A and B ports by

placing them in a high impedance state.

In addition, all A and B outputs include equivalent 26

(nominal) series resistors to reduce overshoot and under-

shoot and are designed to sink/source up to 12 mA at

3.0V.

The LCXR162245 is fabricated with an advanced CMOS

technology to achieve high speed operation while maintain-

ing CMOS low power dissipation.

Features

■ 5V tolerant inputs and outputs

■ 2.3V–3.6V V

specifications provided

■ A and B side outputs have equivalent 26 series

resistors

■ 5.3 ns t

max (V

3.3V), 20 A I

max

■ Power down high impedance inputs and outputs

■ Supports live insertion/withdrawal (Note 1)

■ Flow through pinout

■ Latch-up performance exceeds 500 mA

■ ESD performance:

Human body model 2000V

Machine model

200V

Note 1: To ensure the high-impedance state during power up or down OE

should be tied to V

through a pull-up resistor: the minimum value or the

resistor is determined by the current-sourcing capability of the driver.

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “x” to the ordering code.

Logic Symbol Pin Descriptions

Order Number Package Number Package Description

74LCXR162245MEA MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" Wide

[RAIL]

74LCXR162245MEX MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" Wide

[TAPE and REEL]

74LCXR162245MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

[RAIL]

74LCXR162245MTX MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

[TAPE and REEL]

Pin Names Description

Output Enable Input

T/R

Transmit/Receive Input

–A

Side A Inputs or 3-STATE Outputs

–B

Side B Inputs or 3-STATE Outputs

■ Implements proprietary noise/EMI reduction circuitry

74LCXR162245 Low Voltage 16-Bit Bidirectional Transceiver with 5V Tolerant Inputs/Outputs and 26 Series :

Summary of content (8 pages)

PAGE 1
74LCXR162245 Low Voltage 16-Bit Bidirectional Transceiver with 5V Tolerant Inputs/Outputs and 26: Series Resistors in the Outputs General Description Features The LCXR162245 contains sixteen non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus oriented applications. The device is designed for low voltage (2.5V or 3.3V) VCC applications with capability of interfacing to a 5V signal environment. The device is byte controlled.
PAGE 2
74LCXR162245 Connection Diagram Truth Tables Inputs OE1 Outputs T/R1 L L Bus B0–B7 Data to Bus A0–A7 L H Bus A0–A7 Data to Bus B0–B7 H X HIGH Z State on A0–A7, B0–B7 (Note 2) Inputs Outputs OE2 T/R2 L L L H Bus A8–A15 Data to Bus B8–B15 H X HIGH Z State on A8–A15, B8–B15 (Note 2) Bus B8–B15 Data to Bus A8–A15 Note 2: A and B port inputs are still active Logic Diagram www.fairchildsemi.
PAGE 3
Symbol Parameter VCC Supply Voltage VI DC Input Voltage VO DC Output Voltage IIK DC Input Diode Current IOK DC Output Diode Current Value IO DC Output Source/Sink Current ICC DC Supply Current per Supply Pin IGND DC Ground Current per Ground Pin TSTG Storage Temperature Conditions 0.5 to 7.0 0.5 to 7.0 0.5 to 7.0 0.5 to VCC 0.
PAGE 4
74LCXR162245 DC Electrical Characteristics Symbol (Continued) Parameter VCC Conditions TA (V) IOFF Power-Off Leakage Current VI or VO ICC Quiescent Supply Current VI 5.5V VCC or GND 3.6V d VI, VO d 5.5V (Note 6) 'ICC Increase in ICC per Input VIH VCC 0.6V 40qC to 85qC Min Units Max PA 0 10 2.3 3.6 20 2.3 3.6 r20 2.3 3.6 500 PA PA Note 6: Outputs disabled or 3-STATE only. AC Electrical Characteristics TA Symbol Parameter VCC CL 40qC to 85qC, RL 3.3V r 0.
PAGE 5
74LCXR162245 AC LOADING and WAVEFORMS Generic for LCX Family FIGURE 1. AC Test Circuit (CL includes probe and jig capacitance) Test Switch tPLH, tPHL Open tPZL, tPLZ 6V at VCC 3.3 r 0.3V VCC x 2 at VCC 2.5 r 0.2V tPZH,tPHZ GND Waveform for Inverting and Non-Inverting Functions 3-STATE Output High Enable and Disable Times for Logic Propagation Delay.
PAGE 6
74LCXR162245 Schematic Diagram Generic for LCX Family www.fairchildsemi.
PAGE 7
4LCXR162245 Physical Dimensions inches (millimeters) unless otherwise noted 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" Wide Package Number MS48A 7 www.fairchildsemi.
PAGE 8
74LCXR162245 Low Voltage 16-Bit Bidirectional Transceiver with 5V Tolerant Inputs/Outputs and 26: Series Resistors in the Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.