ST M74HC4851 User Manual

Single 8-channel analog MUX/DEMUX with injection current

Features

■ Low power dissipation:

I

= 2 μA (max.) at TA = 25 °C

CC

■ Injection current protection:

V R

■ "ON" resistance at T

215 Ω typ. (V 160 Ω typ. (V 150 Ω typ. (V

■ Fast switching:

t

■ Wide operating supply voltage range:

V

■ High noise immunity:

V

■ Pin and function compatible with series 4051,

4851

■ Latch-up performance exceeds 500 mA

(JESD 17)

■ ESD performance:

HBM > 2000 V JESD22-A111 MM > 200 V JESD22-A115 CDM > 1000 V JESD22-C101

<1 mV at V

ΔOUT

≤ 3.9 kΩ

S

CC

= 8.6 ns (typ.) at TA = 25 °C, VCC = 4.5 V

pd

= 2 V to 6 V

CC

NIH

= V

= 28% VCC (min.)

NIL

= 5 V I

CC

= 25 °C:

A

≤ 1 mA

IN

= 3.0 V) = 4.5 V) = 6 V)

M74HC4851

protection

Datasheet − production data

SO-16

Applications

■ Automotive

■ Computer

■ Consumer

■ Industrial

Description

The M74HC4851 is a single 8-channel analog multiplexer/demultiplexer manufactured with silicon gate C2MOS technology.

It features injection current effect control which makes the device particularly suited for use in automotive applications where voltages in excess of normal logic voltages are common. The injection current effect control allows signals at disabled input channels to exceed the supply voltage range or go down to ground without affecting the signal of the enabled analog channel.

TSSOP16

This eliminates the need for external dioderesistor networks typically used to keep the analog channel signals within the supply voltage range.

Table 1. Device summary

Order code Temperature range Package

(1)

-40/+125 °C SO-16 (automotive grade)

-40/+125 °C TSSOP16 (automotive grade)

M74HC4851YRM13TR

M74HC4851RM13TR -55/+125 °C SO-16

M74HC4851YTTR

M74HC4851TTR -55/+125 °C TSSOP16

1. Qualification and characterization (according to AEC Q100 and Q003 or equivalent) and advanced screening (according to AEC Q001 and Q002 or equivalent) are ongoing.

June 2012 Doc ID 8640 Rev 6 1/17

This is information on a product in full production.

www.st.com

17

Pin connections M74HC4851

1 Pin connections

Figure 1. Pin connections and IEC logic symbols

Table 2. Pin descriptions

Pin number Symbol Name and function

3 COM OUT/IN Common output/input

6 INH INHIBIT input

7 NC Not connected

11, 10, 9 A, B, C Select inputs

13,14,15,

12, 1, 5, 2, 4

8 GND Ground (0 V)

16 VCC Positive supply voltage

0 to 7 Independent input/outputs

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M74HC4851 Pin connections

Table 3. Truth table

Input state

On channel

INH C B A

LLLL 0

LLLH 1

LLHL 2

LLHH 3

LHLL 4

LHLH 5

LHHL 6

LHHH 7

H X X X NONE

Note: X: don’t care.

Figure 2. Control input equivalent circuit

Figure 3. I/O equivalent circuit

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Pin connections M74HC4851

Figure 4. Functional diagram

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M74HC4851 Absolute maximum ratings and operating conditions

2 Absolute maximum ratings and operating conditions

Note: Absolute maximum ratings are those values beyond which damage to the device may occur.

Functional operation under these conditions is not implied.

Table 4. Absolute maximum ratings

ESD (JESD22)

Symbol Parameter Value Unit

V

Supply voltage -0.5 to +7 V

CC

Control input voltage -0.5 to VCC + 0.5 V

V

IN

V

Switch I/O voltage -0.5 to VCC + 0.5 V

I/O

Control input diode current ± 25 mA

I

CK

I/O diode current ± 25 mA

I

IOK

I

DC VCC or ground current ± 50 mA

CC

P

SO-16 500

Power dissipation

D

T

stg

Lead temperature (10 sec) 300 °C

T

L

Storage temperature -65 to +150 °C

TSSOP16 450

(1)

mW

(1)

mW

Human body model (HBM) 2000 V

Machine model (MM) 200 V

Charged device model (CDM) 1000 V

1. Power dissipation at 65 °C. Derating from 65 °C to 125 °C: SO package -7 mW/°C; TSSOP package -6.1 mW/°C.

Table 5. Recommended operating conditions

Symbol Parameter Value Unit

V

T

t

r

1. For voltage drops across the switch greater than 1.2 V (switch on), excessive VCC current may be drawn; i.e., the current out of the switch may contain both V maximum ratings are exceeded.

2. V

IN

Supply voltage 2 to 6 V

CC

Input output voltage 0 to VCC V

I/O

Static or dynamic voltage across switch

I/O

Control input voltage 0 to VCC V

IN

(1)

0 to 1.2 V

SO-16, TSSOP16 -55 to +125 °C

Operating temperature

op

(2)

Input rise and fall time

, tf

(channel select or enable inputs only)

from 30% to 70% VCC of channel Selected or Enable Inputs.

and switch input components. The reliability of the device is unaffected unless the

CC

SO-16, TSSOP16 (automotive grade) -40 to +125 °C

= 2.0 V 0 to 1000

V

CC

V

= 3.0.V 0 to 800

CC

= 3.3 V 0 to 700

V

CC

= 4.5 V 0 to 500

V

CC

V

= 6.0 V 0 to 400

CC

ns

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Absolute maximum ratings and operating conditions M74HC4851

Table 6. DC specifications

Symbol Parameter

V

CC

(V)

2.0 1.5 1.5 1.5

3.0 2.1 2.1 2.1

V

High level input

IHC

voltage

3.0 2.3 2.3 2.3

4.5 3.15 3.15 3.15

6.0 4.2 4.2 4.2

2.0 0.5 0.5 0.5

3.0 0.9 0.9 0.9

V

Low level input

ILC

voltage

3.3 1.0 1.0 1.0

4.5 1.35 1.35 1.35

6.0 1.8 1.8 1.8

2.0 IS=2mA

3.0

ON

ON resistance

R

3.3 210 270 305 345

4.5 160 210 240 270

Test condition Value

TA = 25 °C Up to 85 °C Up to 125 °C

Min. Typ. Max. Min. Max. Min. Max.

500 650 670 700

215 280 320 360

I

≤2mA

S

= V

IHC

or

V

IN

V

ILC

VIS = VCC to GND

Unit

V

Ω

ΔR

I

OFF

I

ON

Difference of ON resistance between switches

Input/output leakage current (switch off) (any channel)

Input/output leakage current (switch off) (common channel)

Switch input leakage current (switch on, output open)

6.0 150 195 220 250

2.0 I

3.0

3.3 2 8 12 16

4.5 2 8 12 16

=2mA

S

IS≤2mA

V

= V

IN

IHC

V

ILC

VIS = VCC/2

or

410 15 20

2 8 12 16

Ω

6.0 3 9 13 18

6.0

= VCC or GND

V

IN

±0.1 ± 0.5 ± 1.0 μA

6.0 ± 0.2 ± 2 ± 4 μA

6.0 V

= VCC or GND ±0.1 ± 0.5 ± 1 μA

IN

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