74ACT16646MTD Fairchild Semiconductor, 74ACT16646MTD Datasheet - Page 2

• Manufacturer Part Number: 74ACT16646MTD
• Description: IC TRANSCVR/REG 3ST 16B 56TSSOP
• Manufacturer: Fairchild Semiconductor
• Series: 74ACTr

Specifications of 74ACT16646MTD

• Logic Type: Transceiver, Non-Inverting
• Number Of Elements: 2
• Number Of Bits Per Element: 8
• Current - Output High, Low: 24mA, 24mA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 56-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Function Table
H
Note 1: The data output functions may be enabled or disabled by various signals at the G and DIR inputs. Data input functions are always enabled; i.e., data
at the bus pins will be stored on every LOW-to-HIGH transition of the appropriate clock inputs. Also applies to data I/O (A and B: 8-15) and #2 control pins.
Logic Diagram
HIGH Voltage Level
G
H
H
H
L
L
L
L
L
L
L
L
1
DIR
H
H
H
H
X
X
X
L
L
L
L
1
CPAB
Real Time Transfer
Real Time Transfer
H or L
H or L
A-Bus to B-Bus
B-Bus to A-Bus



X
X
X
X
X
X
X
Inputs
1
Immaterial
CPBA
H or L
H or L



X
X
X
X
X
X
1
L
SAB
X
X
X
H
H
X
X
X
X
L
L
LOW Voltage Level
1
SBA
X
X
X
X
X
X
X
H
H
L
L
1
Data I/O (Note 1)
Output
Input
Input
A
0–7

2
LOW-to-HIGH Transition.
Output Clock A
Input
Input
B
0–7
Isolation
Clock A
Clock B
A
A Register to B
Clock A
B
Clock B
B Register to A
Clock B
n
n
to B
to A
n
n
n
n
n
n
n
n
—Real Time (Transparent Mode)
—Real Time (Transparent Mode)
Data into A Register
Data Into B Register
Data to A Register
Data into A Register and Output to B
Data into B Register
into B Register and Output to A
Bus to Register
Register to Bus
Output Operation Mode
Transfer from
Storage from
n
n
(Stored Mode)
(Stored Mode)
n
n