Document
• Contains Six Flip-Flops With Single-Rail
Outputs
• Buffered Clock and Direct Clear Inputs • Applications Include:
Buffer/Storage Registers
Shift Registers
Pattern Generators
• Fully Buffered Outputs for Maximum
Isolation From External Disturbances
• Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs
SN74F174A HEX D-TYPE FLIP-FLOP
WITH CLEAR
SDFS029B – D2932, MARCH 1987 – REVISED OCTOBER 1993
D OR N PACKAGE (TOP VIEW)
CLR 1 1Q 2 1D 3 2D 4 2Q 5 3D 6 3Q 7
GND 8
16 VCC 15 6Q 14 6D 13 5D 12 5Q 11 4D 10 4Q 9 CLK
description
This monolithic, positive-edge-triggered flip-flop utilizes TTL circuitry to implement D-type flip-flop logic with a direct clear (CLR) input. Information at the data (D) inputs meeting the setup time requirements is transferred to the outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positive-going pulse. When the clock (CLK) input is at either the high or low level, the D-input signal has no effect at the output.
The SN74F174A is characterized for operation from 0°C to 70°C.
FUNCTION TABLE (each flip-flop)
INPUTS
CLR CLK D
H
L
X
H
↑
H
H
↑
L
L
X
X
OUTPUT Q
Q0 H L L
logic symbol†
1 CLR
9 CLK
3 1D
4 2D
6 3D
11 4D
13 5D
14 6D
R C1
1D
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2 1Q
5 2Q
7 3Q
10 4Q
12 5Q
15 6Q
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1993, Texas Instruments Incorporated 2–1
SN74F174A HEX D-TYPE FLIP-FLOP WITH CLEAR
SDFS029B – D2932, MARCH 1987 – REVISED OCTOBER 1993
logic diagram (positive logic)
9 CLK
CLR
1
1D 3
1D C1
R
2 1Q
Four Identical Channels Not Shown
6D 14
1D C1
R
15 6Q
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 1.2 V to 7 V Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 mA to 5 mA Voltage applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input-voltage ratings may be exceeded provided the input-current ratings are observed.
recommended operating conditions
VCC VIH VIL IIK IOH IOL TA
Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current Operating free-air temperature
MIN NOM MAX UNIT
4.5
5 5.5 V
2
V
0.8 V
– 18 mA
– 1 mA
20 mA
0
70 °C
2–2
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
SN74F174A
HEX D-TYPE FLIP-FLOP WITH CLEAR
SDFS029B – D2932, MARCH 1987 – REVISED OCTOBER 1993
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP† MAX UNIT
VIK
VCC = 4.5 V,
II = – 18 mA
– 1.2 V
VOH
VCC = 4.5 V, VCC = 4.75 V,
IOH = – 1 mA IOH = – 1 mA
2.5 3.4 V
2.7
VOL
VCC = 4.5 V,
IOL = 20 mA
0.3 0.5 V
II
VCC = 5.5 V,
VI = 7 V
0.1 mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20 µA
IIL IOS‡
VCC = 5.5 V, VCC = 5.5 V,
VI = 0.5 V VO = 0
– 0.6 mA
– 60
– 150 mA
ICCH
VCC = 5.5 V,
See Note 2
30
45 mA
ICCL
VCC = 5.5 V,
See Note 3
39
55 mA
† All typical values are at VCC = 5 V, TA = 25°C. ‡ Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
NOTES: 2. ICCH is measured with all outputs ope.