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PDF M74HCT258 Data sheet ( Hoja de datos )
| Número de pieza | M74HCT258 | |
| Descripción | QUAD 2 CHANNEL MULTIPLEXER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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M74HCT258
QUAD 2 CHANNEL MULTIPLEXER (3-STATE, INVERTING)
s HIGH SPEED :
tPD = 17 ns (TYP.) at VCC = 4.5V
s LOW POWER DISSIPATION:
ICC =4µA(MAX.) at TA=25°C
s COMPATIBLE WITH TTL OUTPUTS :
VIH = 2V (MIN.) VIL = 0.8V (MAX)
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 6mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 258
DESCRIPTION
The M74HCT258 is an high speed CMOS QUAD
2 CHANNEL MULTIPLEXER (3-STATE)
fabricated with silicon gate C2MOS technology.
This IC is composed of an independent 2-channel
multiplexer with common SELECT and ENABLE
(OE) input.
The M74HCT258 is an inverting multiplexer.
When the ENABLE input is held "High", outputs of
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
T&R
DIP
SOP
TSSOP
M74HCT258B1R
M74HCT258M1R M74HCT258RM13TR
M74HCT258TTR
the IC become in a High-Impedance state. If
SELECT input is held low, "A" data is selected,
when SELECT is high , "B" data is chosen.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
August 2001
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1 page  
M74HCT258
CAPACITIVE CHARACTERISTICS
Test Condition
Value
Symbol
Parameter
VCC
(V)
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
CIN Input Capacitance
5 10 10 10 pF
COUT
Output
Capacitance
10 pF
CPD Power Dissipation
Capacitance (note
1)
33
pF
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/4 (per
Channel)
TEST CIRCUIT
TEST
tPLH, tPHL
tPZL, tPLZ
tPZH, tPHZ
CL = 50pF/150pF or equivalent (includes jig and probe capacitance)
R1 = 1KΩ or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
SWITCH
Open
VCC
GND
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5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet M74HCT258.PDF ] | |
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