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74HC4351D-74HC4351N-74HCT4351D-74HCT4351N
74HC/HCT4351; 8-channel analog multiplexer/demultiplexer with latch
Philips Semiconductors Product specification
8-channel analog
multiplexer/demultiplexer with latch 74HC/HCT4351
FEATURES Wide analog input voltage range:
± 5 V Low “ON” resistance:Ω (typ.) at VCC− VEE= 4.5 VΩ (typ.) at VCC− VEE= 6.0 VΩ (typ.) at VCC− VEE= 9.0 V Logic level translation: to enable 5 V logic to
communicate with± 5 V analog signals Typical “break before make” built in Address latches provided Output capability: non-standard ICC category: MSI
GENERAL DESCRIPTIONThe 74HC/HCT4351 are high-speed Si-gate CMOS
devices. They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT4351 are 8-channel analog
multiplexers/demultiplexers with three select inputs (S0to
S2), two enable inputs (E1 and E2), a latch enable input
(LE), eight independent inputs/outputs (Y0 to Y7) and a
common input/output (Z).
WithE1 LOW and E2 is HIGH, one of the eight switches is
selected (low impedance ON-state) by S0 to S2. The data
at the select inputs may be latched by using the active
LOW latch enable input (LE). WhenLE is HIGH the latch
is transparent. When either of the two enable inputs, (active LOW) and E2 (active HIGH), is inactive, all 8
analog switches are turned off.
VCC and GND are the supply voltage pins for the digital
control inputs (S0 to S2, LE,E1 and E2). The VCC to GND
ranges are 2.0 to 10.0 V for HC and 4.5 to 5.5 V for HCT.
The analog inputs/outputs (Y0 to Y7, and Z) can swing
between VCC as a positive limit and VEE as a negative
limit.
VCC− VEE may not exceed 10.0 V.
For operation as a digital multiplexer/demultiplexer, VEEis
connected to GND (typically ground).
QUICK REFERENCE DATAVEE= GND= 0 V; Tamb =25 °C; tr =tf= 6 ns
Notes CPD is used to determine the dynamic power
dissipation (PD in μW): =CPD × VCC2 × fi +∑ {(CL+ CS) × VCC2×fo}
where:= input frequency in MHz= output frequency in MHz= output load capacitance in pF= max. switch capacitance in pF {(CL+ CS) × VCC2×fo}= sum of outputs For HC the condition is VI= GND to VCC
For HCT the condition is VI= GND to VCC − 1.5 V
ORDERING INFORMATIONSee “74HC/HCT/HCU/HCMOS Logic Package
Information”.
Philips Semiconductors Product specification
8-channel analog multiplexer/demultiplexer
with latch 74HC/HCT4351
PIN DESCRIPTION
Philips Semiconductors Product specification
8-channel analog multiplexer/demultiplexer
with latch 74HC/HCT4351
FUNCTION TABLE
Notes Last selected channel “ON”. Selected channels latched. H= HIGH voltage level= LOW voltage level= don’t care= HIGH-to-LOWLE transition
APPLICATIONS Analog multiplexing and demultiplexing Digital multiplexing and demultiplexing Signal gating
Philips Semiconductors Product specification
8-channel analog multiplexer/demultiplexer
with latch 74HC/HCT4351
RATINGSLimiting values in accordance with the Absolute Maximum System (IEC 134)
Voltages are referenced to VEE= GND (ground= 0 V)
Note to ratings To avoid drawing VCC current out of terminal Z, when switch current flows in terminals Yn, the voltage drop across
the bidirectional switch must not exceed 0.4 V. If the switch current flows into terminal Z, no VCC current will flow out
of terminals Yn. In this case there is no limit for the voltage drop across the switch, but the voltages at Yn and Z may
not exceed VCC or VEE.
RECOMMENDED OPERATING CONDITIONS
Philips Semiconductors Product specification
8-channel analog multiplexer/demultiplexer
with latch 74HC/HCT4351
DC CHARACTERISTICS FOR 74HC/HCTFor 74HC: VCC− GND or VCC− VEE= 2.0, 4.5, 6.0 and 9.0 V
For 74HCT: VCC− GND = 4.5 and 5.5 V; VCC− VEE= 2.0, 4.5, 6.0 and 9.0 V
Notes to DC characteristics At supply voltages (VCC− VEE) approaching 2.0 V, the analog switch ON-resistance becomes extremely non-linear.
There it is recommended that these devices be used to transmit digital signals only, when using these supply
Philips Semiconductors Product specification
8-channel analog multiplexer/demultiplexer
with latch 74HC/HCT4351
DC CHARACTERISTICS FOR 74HCVoltages are referenced to GND (ground= 0 V)
Philips Semiconductors Product specification
8-channel analog multiplexer/demultiplexer
with latch 74HC/HCT4351
AC CHARACTERISTICS FOR 74HCGND= 0 V; tr =tf= 6 ns; CL= 50 pF
Philips Semiconductors Product specification
8-channel analog multiplexer/demultiplexer
with latch 74HC/HCT4351
