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PDF HD74HC242 Data sheet ( Hoja de datos )
| Número de pieza | HD74HC242 | |
| Descripción | Quad. Bus Transceivers (with 3-state outputs)/Quad. Bus Transceivers (with noninverted 3-state outputs) | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74HC242/HD74HC243
Quad. Bus Transceivers (with 3-state outputs)
Quad. Bus Transceivers (with noninverted 3-state outputs)
Description
The HD74HC242 is an inverting buffer and the HD74HC243 is a noninverting buffer. Each device has one
active high enable (GBA), and one active low enable (GAB). GBA enables the A output and GAB enables
the B outputs. The device does not have schmitt trigger inputs.
Features
• High Speed Operation: tpd = 10 ns typ (CL = 50 pF)
• High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Control inputs
GAB
GBA
HH
LH
HL
LL
I : Input
O : Output
O : Inverting Output
Z : Hight Impedance
HD74HC242
Data Port Status
AB
OI
ZZ
ZZ
IO
HC74HC243
Data Port Status
AB
OI
ZZ
ZZ
IO
1 page  
HD74HC242/HD74HC243
DC Characteristics
Item
Input voltage
Output voltage
Off-state output
current
Input current
Quiescent supply
current
Ta = 25°C
Ta = –40 to
+85°C
Symbol
VIH
VCC (V) Min Typ Max Min
2.0 1.5 — — 1.5
4.5 3.15 — — 3.15
Max
—
—
Unit
V
6.0 4.2 — — 4.2 —
VIL 2.0 — — 0.5 — 0.5 V
4.5 — — 1.35 — 1.35
6.0 — — 1.8 — 1.8
VOH 2.0 1.9 2.0 — 1.9 — V
4.5 4.4 4.5 — 4.4 —
6.0 5.9 6.0 — 5.9 —
4.5 4.18 — — 4.13 —
6.0 5.68 — — 5.63 —
VOL 2.0 — 0.0 0.1 — 0.1 V
4.5 — 0.0 0.1 — 0.1
6.0 — 0.0 0.1 — 0.1
4.5 — — 0.26 — 0.33
6.0 — — 0.26 — 0.33
IOZ 6.0 — — ±0.5 — ±5.0 µA
Iin 6.0 — — ±0.1 — ±1.0 µA
ICC 6.0 — — 4.0 — 40 µA
Test Conditions
Vin = VIH or VIL IOH = –20 µA
IOH = –6 mA
IOH = –7.8 mA
Vin = VIH or VIL IOL = 20 µA
IOL = 6 mA
IOL = 7.8 mA
Vin = VIH or VIL,
Vout = VCC or GND
Vin = VCC or GND
Vin = VCC or GND, Iout = 0 µA
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet HD74HC242.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HD74HC240 | Octal Buffers/Line Drivers/Line Receivers(with inverted 3-state outputs) | Hitachi Semiconductor |
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| HD74HC241 | Octal Buffers/Line Drivers/Line Receivers(with noninverted 3-state outputs) | Hitachi Semiconductor |
| HD74HC242 | Quad. Bus Transceivers (with 3-state outputs)/Quad. Bus Transceivers (with noninverted 3-state outputs) | Hitachi Semiconductor |
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