74HC_HCT166_15 Datasheet, PDF (1/21 Pages) NXP Semiconductors – 8-bit parallel-in/serial out shift register

74HC166; 74HCT166
8-bit parallel-in/serial out shift register
Rev. 3 — 11 September 2013
Product data sheet
1. General description
The 74HC166; 74HCT166 is an 8-bit serial or parallel-in/serial-out shift register. The
device features a serial data input (DS), eight parallel data inputs (D0 to D7) and a serial
output (Q7). When the parallel enable input (PE) is LOW, the data from D0 to D7 is loaded
into the shift register on the next LOW-to-HIGH transition of the clock input (CP). When
PE is HIGH, data enters the register serially at DS with each LOW-to-HIGH transition of
CP. When the clock enable input (CE) is LOW data is shifted on the LOW-to-HIGH
transitions of CP. A HIGH on CE disables the CP input. Inputs include clamp diodes which
enable the use of current limiting resistors to interface inputs to voltages in excess of V_CC.
2. Features and benefits
 Synchronous parallel-to-serial applications
 Synchronous serial input for easy expansion
 Complies with JEDEC standard no. 7A
 Input levels:
 For 74HC166: CMOS level
 For 74HCT166: TTL level
 ESD protection:
 HBM JESD22-A114E exceeds 2000 V
 MM JESD22-A115-A exceeds 200 V
 Multiple package options
 Specified from 40 C to +85 C and from 40 C to +125 C
3. Ordering information
Table 1. Ordering information
Type number Package
Temperature range Name
74HC166N 40 C to +125 C DIP16
74HCT166N
74HC166D 40 C to +125 C SO16
74HCT166D
74HC166DB 40 C to +125 C SSOP16
74HCT166DB
74HC166PW 40 C to +125 C TSSOP16
Description
plastic dual in-line package; 16 leads (300 mil)
Version
SOT38-4
plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
plastic shrink small outline package; 16 leads; body width SOT338-1
5.3 mm
plastic thin shrink small outline package; 16 leads; body
width 4.4 mm
SOT403-1