Datasheet

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February 1984

Revised February 2002

MM74HCT164 8-Bit Serial-in/Parallel-out Shift Register

MM74HCT164

8-Bit Serial-in/Parallel-out Shift Register

General Description

The MM74HCT164 utilizes advanced silicon-gate CMOS

technology. It has the high noise immunity and low con-

sumption of standard CMOS integrated circuits. It also

offers speeds comparable to low power Schottky devices.

This 8-bit shift register has gated serial inputs and CLEAR.

Each register bit is a D-type master/slave flip-flop. Inputs A

& B permit complete control over the incoming data. A

LOW at either or both inputs inhibits entry of new data and

resets the first flip-flop to the low level at the next clock

pulse. A high level on one input enables the other input

which will then determine the state of the first flip-flop. Data

at the serial inputs may be changed while the clock is HIGH

or LOW, but only information meeting the setup and hold

time requirements will be entered. Data is serially shifted in

and out of the 8-bit register during the positive going transi-

tion of the clock pulse. Clear is independent of the clock

and accomplished by a low level at the CLEAR input.

The 74HCT logic family is functionally as well as pin-out

compatible with the standard 74LS logic family. All inputs

are protected from damage due to static discharge by inter-

nal diode clamps to V

and ground.

MM74HCT devices are intended to interface between TTL

and NMOS components and standard CMOS devices.

These parts are also plug-in replacements for LS-TTL

devices and can be used to reduce power consumption in

existing designs.

Features

■ Typical propagation delay: 20 ns

■ Low quiescent current: 40

µA maximum (74HCT Series)

■ Low input current: 1

µA maximum

■ Fanout of 10 LS-TTL loads

■ TTL input compatible

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Order Number Package Number Package Description

MM74HCT164M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow

MM74HCT164SJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

MM74HCT164N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

Summary of content (7 pages)

PAGE 1
Revised February 2002 MM74HCT164 8-Bit Serial-in/Parallel-out Shift Register General Description Features The MM74HCT164 utilizes advanced silicon-gate CMOS technology. It has the high noise immunity and low consumption of standard CMOS integrated circuits. It also offers speeds comparable to low power Schottky devices. ■ Typical propagation delay: 20 ns This 8-bit shift register has gated serial inputs and CLEAR. Each register bit is a D-type master/slave flip-flop.
PAGE 2
MM74HCT164 Connection Diagram Truth Table Inputs Outputs Clear Clock A B QA QB ... QH L X X X L L L H L X X QAO QBO QHO H ↑ H H H QAn QGn H ↑ L X L QAn QGn H ↑ X L L QAn QGn H = HIGH Level (steady state) L = LOW Level (steady state) X = Irrelevant (any input, including transitions) ↑ = Transition from LOW-to-HIGH level. QAO, QBO, QHO = the level of QA, QB, or QH, respectively, before the indicated steady state input conditions were established.
PAGE 3
Recommended Operating Conditions (Note 2) −0.5 to +7.0V Supply Voltage (VCC ) DC Input Voltage (VIN) −1.5 to VCC +1.5V DC Output Voltage (VOUT) −0.5 to VCC +0.5V Clamp Diode Current (IIK, IOK) ±20 mA DC Output Current, per pin (IOUT) ±25 mA 600 mW 500 mW Units 5.5 V 0 VCC V −40 +85 °C 500 ns Input Rise or Fall Times (tr, tf) Power Dissipation (PD) S.O. Package Only Max 4.
PAGE 4
MM74HCT164 AC Electrical Characteristics VCC = 5V, TA = 25°C, CL = 15 pF, tr = tf = 6 ns Symbol fMAX tPHL, tPLH Parameter Conditions Maximum Operating 50% Duty Frequency from Clock to Q Cycle Clock Guaranteed Typ Units Limit 55 35 MHz 17 27 ns 23 38 ns 3 6 ns tH ≥ 20 ns 6 13 ns tS ≥ 20 ns 1.
PAGE 5
MM74HCT164 Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow Package Number M14A 5 www.fairchildsemi.
PAGE 6
MM74HCT164 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M14D www.fairchildsemi.
PAGE 7
MM74HCT164 8-Bit Serial-in/Parallel-out Shift Register Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Package Number N14A Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.