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PDF MC74LVQ245 Data sheet ( Hoja de datos )
| Número de pieza | MC74LVQ245 | |
| Descripción | LOW-VOLTAGE CMOS OCTAL TRANSCEIVER | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage Quiet CMOS
Octal Transceiver
(3-State, Non-Inverting)
The MC74LVQ245 is a high performance, non–inverting octal
transceiver operating from a 2.7 to 3.6V supply. The MC74LVQ245 is
suitable for memory address driving and all TTL level bus oriented
transceiver applications.
Current drive capability is 12mA at both A and B ports. The
Transmit/Receive (T/R) input determines the direction of data flow
through the bi–directional transceiver. Transmit (active–HIGH) enables
data from A ports to B ports; Receive (active–LOW) enables data from B
to A ports. The Output Enable input, when HIGH, disables both A and B
ports by placing them in a HIGH Z condition.
• Designed for 2.7 to 3.6V VCC Operation – Ideal for Low Power/Low
Noise Applications
• Guaranteed Simultaneous Switching Noise Level and Dynamic
Threshold Performance
• Guaranteed Skew Specifications
• Guaranteed Incident Wave Switching into 75Ω
• Low Static Supply Current (10µA) Substantially Reduces System Power
Requirements
• Latchup Performance Exceeds 500mA
• ESD Performance: Human Body Model >2000V
MC74LVQ245
LVQ
LOW–VOLTAGE CMOS
OCTAL TRANSCEIVER
20
1
20
1
20
1
DW SUFFIX
PLASTIC SOIC
CASE 751D–04
M SUFFIX
PLASTIC SOIC EIAJ
CASE 967–01
SD SUFFIX
PLASTIC SSOP
CASE 940C–03
Pinout: 20–Lead (Top View)
VCC OE B0 B1 B2 B3 B4 B5 B6 B7
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
T/R A0 A1 A2 A3 A4 A5 A6 A7 GND
20
1
DT SUFFIX
PLASTIC TSSOP
CASE 948E–02
PIN NAMES
Pins
Function
OE
T/R
A0–A7
B0–B7
Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State
Outputs
Side B 3–State Inputs or 3–State
Outputs
12/95
© Motorola, Inc. 1995
DataSheet4 U .com
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MC74LVQ245
An, Bn 50% VCC
tPLH
Bn, An
50% VCC
50% VCC
tPHL
50% VCC
WAVEFORM 1 – PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
VCC
0V
VOH
VOL
OE, T/R
An, Bn
An, Bn
PULSE
GENERATOR
50% VCC
tPZH tPHZ
50% VCC
50% VCC
VCC
0V
VCC
VOH – 0.3V
tPZL tPLZ
50% VCC
VOL + 0.3V
GND
WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
Figure 1. AC Waveforms
VCC
DUT
RT
R1
CL RL
2 • VCC
OPEN
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
2 • VCC
Open Collector/Drain tPLH and tPHL
2 • VCC
tPZH, tPHZ
Open
CL = 50pF or equivalent (Includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
Figure 2. Test Circuit
ECLinPS and ECLinPS Lite
DataSheetD4LU14.0co—mRev 3
5
MOTOROLA
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MC74LVQ245.PDF ] | |
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