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PDF MC74LVQ138 Data sheet ( Hoja de datos )
| Número de pieza | MC74LVQ138 | |
| Descripción | LOW-VOLTAGE CMOS DECODER/DEMULTIPLEXER | |
| Fabricantes | Motorola Semiconductors | |
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage Quiet CMOS
1-of-8 Decoder/Demultiplexer
The MC74LVQ138 is a high performance, 1–of–8 decoder/
demultiplexer operating from a 2.7 to 3.6V supply. High impedance TTL
compatible inputs significantly reduce current loading to input drivers
while TTL compatible outputs offer improved switching noise
performance. The MC74LVQ138 is suitable for memory address
decoding and other TTL level bus oriented applications.
The MC74LVQ138 high–speed 1–of–8 decoder/demultiplexer accepts
three binary weighted inputs (A0, A1, A2) and, when enabled, provides
eight mutually exclusive active–LOW outputs (O0–O7). The LVQ138
features three Enable inputs, two active–LOW (E1, E2) and one
active–HIGH (E3). All outputs will be HIGH unless E1 and E2 are LOW,
and E3 is HIGH. This multiple enabled function allows easy parallel
expansion of the device to a 1–of–32 (5 lines to 32 lines) decoder with just
four LVQ138 devices and one inverter (See Figure 1). The LVQ138 can
be used as an 8–output demultiplexer by using one of the active–LOW
Enable inputs as the data input and the other Enable inputs as strobes.
The Enable inputs which are not used must be permanently tied to their
appropriate active–HIGH or active–LOW state.
Current drive capability is 12mA at the outputs.
• 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
MC74LVQ138
LVQ
LOW–VOLTAGE CMOS
DECODER/DEMULTIPLEXER
16
1
16
1
16
1
16
1
D SUFFIX
PLASTIC SOIC
CASE 751B–05
M SUFFIX
PLASTIC SOIC EIAJ
CASE 966–01
SD SUFFIX
PLASTIC SSOP
CASE 940B–03
DT SUFFIX
PLASTIC TSSOP
CASE 948F–01
Pinout: 16–Lead Plastic Package (Top View)
VCC O0 O1 O2 O3 O4 O5 O6
16 15 14 13 12 11 10 9
12345678
A0 A1 A2 E1 E2 E3 O7 GND
PIN NAMES
Pins
A0–A2
E1–E2
E3
O0–O7
Function
Address Inputs
Enable Inputs
Enable Input
Outputs
1/96
© Motorola, Inc. 1996
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MC74LVQ138
An, E3 50%
VCC
tPHL
On
50% VCC
50% VCC
VCC
0V
tPLH
VOH
50% VCC
VOL
WAVEFORM 1: PROPAGATION DELAYS FOR INVERTING OUTPUTS
An, E1, E2 50%
VCC
tPHL
On
50% VCC
50% VCC
VCC
0V
tPLH
VOH
50% VCC
VOL
WAVEFORM 2: PROPAGATION DELAYS FOR NON–INVERTING OUTPUTS
Figure 1. AC Waveforms
VCC
PULSE
GENERATOR
DUT
RT
CL RL
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
LCX DATA
DataSheetB4RU14.c78om
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| PDF Descargar | [ Datasheet MC74LVQ138.PDF ] | |
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