M74HC259

8-bit addressable latch

Datasheet - production data

Features

•

High speed: tPD = 20 ns (typ.) at VCC = 6 V

•

Low power dissipation:

ICC = 4 µA (max.) at TA = 25 °C

•

High noise immunity:

VNIH = VNIL = 28 % VCC (min.)

•

Symmetrical output impedance:

|IOH| = IOL = 4 mA (min)

•

Balanced propagation delays: tPLH ~= tPHL

•

Wide operating voltage range:

VCC (OPR) = 2 V to 6 V

•

Pin and function compatible with

74 series 259

•

ESD performance

−

CDM: 1 kV

−

HBM: 1.5 kV

−

MM: 200 V

Description

The M74HC259 is a high-speed CMOS 8-bit

addressable latch manufactured with silicon gate

C

2MOS technology.

The M74HC259 has single data input (D) 8 latch

outputs (Q0-Q7), 3 address inputs (A, B, and C),

common enable input (E), and a common

CLEAR

input. To operate this device as an

addressable latch, data is held on the D input,

and the address of the latch into which the data is

to be entered is held on the A, B, and C inputs.

When ENABLE

is taken low, the data flows

through to the address outputs. The data is

stored on the positive-going edge of the

ENABLE

pulse. All unaddressed latches will

remain unaffected. With ENABLE

in the high

state, the device is deselected and all latches

remain in their previous state, unaffected by

changes on the data or address inputs. To

eliminate the possibility of entering erroneous

data into the latches, the ENABLE

should be

held high (inactive) while the address lines are

changing. If ENABLE

is held high and

CLEAR

is taken low, all eight latches are

cleared to the low state. If ENABLE

is low, all

latches except the addressed latch will be

cleared. The addressed latch will instead follow

the D input, effectively implementing a 3-to-8 line

decoder.

All inputs are equipped with protection circuits to

guard against static discharge and transient

excess voltage.

Table 1: Device summary

Order code

Temperature

range

Package

Packaging

Marking

M74HC259YRM13TR

(1)

-40 °C to

+125 °C

SO16

(automotive

grade)

1

Tape and

reel

74HC259Y

M74HC259RM13TR

-55 °C to

+125 °C

SO16

Tape and

reel

74HC259

M74HC259TTR

-55 °C to

+125 °C

TSSOP16

Tape and

reel

HC259

M74HC259YTTR

1

-40 °C to

+125 °C

TSSOP16

(automotive

grade)

1

Tape and

reel

HC259Y

Notes:

(1)Qualification and characterization according to AEC Q100 and Q003 or equivalent,

advanced screening according to AEC Q001 and Q002 or equivalent.

TSSOP16

SO16

November 2013

DocID001933 Rev 2

1/19

This is information on a product in full production.

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