OCTAL D-TYPE LATCH
Octal D-Type Latch with 3-State Outputs
The MC74AC564/74ACT564 is a high-speed, low power octal flip-flop with a buffere...
Description
Octal D-Type Latch with 3-State Outputs
The MC74AC564/74ACT564 is a high-speed, low power octal flip-flop with a buffered common Clock (CP) and a buffered common Output Enable (OE).
The information presented to the D inputs is stored in the flip-flops on the LOW-to-HIGH Clock (CP) transition.
The MC74AC564/74ACT564 device is functionally identical to the MC74AC574/74ACT574, but with inverted outputs.
Inputs and Outputs on Opposite Sides of Package Allowing Easy
Interface with Microprocessors
Useful as Input or Output Port for Microprocessors Functionally Identical to MC74AC574/74ACT574 but with Inverted
Outputs
3-State Outputs for Bus-Oriented Applications Outputs Source/Sink 24 mA ′ACT564 Has TTL Compatible Inputs
VCC O0 O1 O2 O3 O4 O5 O6 O7 CP
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10 OE D0 D1 D2 D3 D4 D5 D6 D7 GND
Figure 1. Pinout: 20−Lead Packages Conductors (Top View)
PIN NAMES
D0−D7 CP OE O0−O7
Data Inputs Clock Pulse Input 3-State Output Enable Input 3-State Outputs
MC74AC564 MC74ACT564
OCTAL D-TYPE LATCH WITH
3-STATE OUTPUTS
N SUFFIX CASE 738-03
PLASTIC
DW SUFFIX CASE 751D-04
PLASTIC
D0 D1 D2 D3 D4 D5 D6 D7 CP OE
O0 O1 O2 O3 O4 O5 O6 O7
Figure 2. LOGIC SYMBOL
© Semiconductor Components Industries, LLC, 2006
1
June, 2006 − Rev. 5
Publication Order Number: MC74AC564/D
MC74AC564 MC74ACT564
FUNCTIONAL DESCRIPTION
The MC74AC564/74ACT564 consists of eight edgetriggered flip-flops with individual D-type inputs and 3-state complementary output...
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