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PDF 74LCXR2245 Data sheet ( Hoja de datos )
| Número de pieza | 74LCXR2245 | |
| Descripción | Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs and 26 Series Resistors on Both A and B Ports | |
| Fabricantes | Fairchild Semiconductor | |
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October 2000
Revised October 2000
74LCXR2245
Low Voltage Bidirectional Transceiver with
5V Tolerant Inputs and Outputs and
26Ω Series Resistors on Both A and B Ports
General Description
The LCXR2245 contains eight non-inverting bidirectional
buffers with 3-STATE outputs and is intended for bus ori-
ented applications. The device is designed for low voltage
(2.5V and 3.3V) VCC applications with capability of interfac-
ing to a 5V signal environment. The T/R input determines
the direction of data flow through the device. The OE input
disables both the A and B ports by placing them in a high
impedance state. The 26Ω series resistor helps reduce
output overshoot and undershoot.
The LCXR2245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
Features
s 5V tolerant inputs and outputs
s 2.3V–3.6V VCC specifications provided
s 8.0 ns tPD max (VCC = 3.3V), 10 µA ICC max
s Power down high impedance inputs and outputs
s Supports live insertion/withdrawal (Note 1)
s ±12 mA output drive (VCC = 3.0V)
s Implements patented noise/EMI reduction circuitry
s Latch-up performance exceeds 500 mA
s Equivalent 26Ω series resistor on all outputs
s 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 VCC through a pull-up resistor: the minimum value or the
resistor is determined by the current-sourcing capability of the driver.
Ordering Code:
Order Number Package Number
Package Description
74LCXR2245WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LCXR2245SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCXR2245MSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74LCXR2245MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
Pin Descriptions
Pin Names
OE
T/R
A0–A7
B0–B7
Description
Output Enable Input
Transmit/Receive Input
Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs
© 2000 Fairchild Semiconductor Corporation DS500361
www.fairchildsemi.com
1 page  
AC LOADING and WAVEFORMS Generic for LCX Family
FIGURE 1. AC Test Circuit (CL includes probe and jig capacitance)
Test
tPLH, tPHL
tPZL, tPLZ
tPZH,tPHZ
Switch
Open
6V at VCC = 3.3 ± 0.3V
VCC x 2 at VCC = 2.5 ± 0.2V
GND
Waveform for Inverting and Non-Inverting Functions
3-STATE Output High Enable and
Disable Times for Logic
Propagation Delay. Pulse Width and trec Waveforms
Setup Time, Hold Time and Recovery Time for Logic
3-STATE Output Low Enable and
Disable Times for Logic
trise and tfall
FIGURE 2. Waveforms
(Input Characteristics; f =1MHz, tR = tF = 3ns)
Symbol
Vmi
Vmo
Vx
Vy
3.3V ± 0.3V
1.5V
1.5V
VOL + 0.3V
VOH − 0.3V
VCC
2.7V
1.5V
1.5V
VOL + 0.3V
VOH − 0.3V
2.5V ± 0.2V
VCC/2
VCC/2
VOL + 0.15V
VOH − 0.15V
5 www.fairchildsemi.com
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet 74LCXR2245.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| 74LCXR2245 | Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs and 26 Series Resistors on Both A and B Ports | Fairchild Semiconductor |
| 74LCXR2245MSA | Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs and 26 Series Resistors on Both A and B Ports | Fairchild Semiconductor |
| 74LCXR2245MTC | Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs and 26 Series Resistors on Both A and B Ports | Fairchild Semiconductor |
| 74LCXR2245SJ | Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs and 26 Series Resistors on Both A and B Ports | Fairchild Semiconductor |
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