DM74AS74N

DM74AS74N Datasheet

DM74AS74 Dual D-Type Positive-Edge-Triggered Flip-Flop with Preset and Clear

Part	Datasheet
DM74AS74N	DM74AS74N (pdf)

Related Parts	Information
DM74AS74MX	DM74AS74MX
DM74AS74M	DM74AS74M
DM74AS74SJ	DM74AS74SJ
DM74AS74SJX	DM74AS74SJX

PDF Datasheet Preview
DM74AS74 Dual D-Type Positive-Edge-Triggered Flip-Flop with Preset and Clear DM74AS74 Dual D-Type Positive-Edge-Triggered Flip-Flop with Preset and Clear The AS74 is a dual edge-triggered flip-flops. Each flip-flop has individual D, clock, clear and preset inputs, and also complementary Q and Q outputs. Information at input D is transferred to the Q output on the positive going edge of the clock pulse. Clock triggering occurs at a voltage level of the clock pulse and is not directly related to the transition time of the positive going pulse. When the clock input is at either the HIGH or LOW level, the D input signal has no effect. Asynchronous preset and clear inputs will set or clear Q output respectively upon the application of LOW level signal. s Switching specifications at 50 pF s Switching specifications guaranteed over full tempera- ture and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL process s Functionally and pin-for-pin compatible with Schottky and LS TTL counterpart s Improved AC performance over S74 at approximately half the power Ordering Code: Order Number Package Number Package Description DM74AS74M M14A 14-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow DM74AS74SJX M14D 14-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide DM74AS74N N14A 14-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table Inputs Outputs PR CLR CLK D LHXX HLXX L X H Note 1 H Note 1 HHL X L = LOW State H = HIGH State X = Don't Care = Positive Edge Transition Q0 = Previous Condition of Q Note 1 This condition is nonstable it will not persist when preset and clear inputs return to their inactive HIGH level. The output levels in this condition are not guaranteed to meet the VOH specification. 2000 Fairchild Semiconductor Corporation DS006282 DM74AS74 Logic Diagram DM74AS74 Absolute Maximum Ratings Note 2 Supply Voltage Input Voltage Operating Free Air Temperature Range 0°C to +70°C Storage Temperature Range −65°C to +150°C Typical N Package 76.0°C/W M Package 107.0°C/W Note 2 The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Recommended Operating Conditions Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current fCLK Clock Frequency tW CLK Width of Clock Pulse HIGH Pulse Width Preset & Clear LOW Data Setup Time Note 3

PDF Datasheet Preview

DM74AS74 Dual D-Type Positive-Edge-Triggered Flip-Flop with Preset and Clear

DM74AS74 Dual D-Type Positive-Edge-Triggered Flip-Flop with Preset and Clear

The AS74 is a dual edge-triggered flip-flops. Each flip-flop has individual D, clock, clear and preset inputs, and also complementary Q and Q outputs.

Information at input D is transferred to the Q output on the positive going edge of the clock pulse. Clock triggering occurs at a voltage level of the clock pulse and is not directly related to the transition time of the positive going pulse. When the clock input is at either the HIGH or LOW level, the D input signal has no effect.

Asynchronous preset and clear inputs will set or clear Q output respectively upon the application of LOW level signal.
s Switching specifications at 50 pF s Switching specifications guaranteed over full tempera-
ture and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL
process s Functionally and pin-for-pin compatible with Schottky
and LS TTL counterpart s Improved AC performance over S74 at approximately
half the power
Ordering Code:

Order Number Package Number

Package Description

DM74AS74M

M14A
14-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow

DM74AS74SJX

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

DM74AS74N

N14A
14-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Function Table

Inputs

Outputs

PR CLR CLK D

LHXX

HLXX

L X H Note 1 H Note 1

HHL X

L = LOW State H = HIGH State X = Don't Care = Positive Edge Transition Q0 = Previous Condition of Q

Note 1 This condition is nonstable it will not persist when preset and clear inputs return to their inactive HIGH level. The output levels in this condition are not guaranteed to meet the VOH specification.
2000 Fairchild Semiconductor Corporation DS006282

DM74AS74

Logic Diagram

DM74AS74

Absolute Maximum Ratings Note 2

Supply Voltage

Input Voltage

Operating Free Air Temperature Range 0°C to +70°C

Storage Temperature Range
−65°C to +150°C

Typical N Package
76.0°C/W

M Package
107.0°C/W

Note 2 The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation.

Recommended Operating Conditions

Parameter

Supply Voltage

HIGH Level Input Voltage

LOW Level Input Voltage

HIGH Level Output Current

LOW Level Output Current
fCLK

Clock Frequency
tW CLK

Width of Clock Pulse

HIGH

Pulse Width Preset & Clear LOW

Data Setup Time Note 3

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived DM74AS74N Datasheet file may be downloaded here without warranties.

Datasheet ID: DM74AS74N 513740