74ABT16646CMTDX Fairchild Semiconductor, 74ABT16646CMTDX Datasheet - Page 2

• Manufacturer Part Number: 74ABT16646CMTDX
• Description: IC TRANSCVR TRI-ST 16BIT 56TSSOP
• Manufacturer: Fairchild Semiconductor
• Series: 74ABTr

Specifications of 74ABT16646CMTDX

• Logic Type: Transceiver, Non-Inverting
• Number Of Elements: 2
• Number Of Bits Per Element: 8
• Current - Output High, Low: 32mA, 64mA
• 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
L

X
Note 1: The data output functions may be enabled or disabled by various signals at the OE 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.
LOW Voltage Level
HIGH Voltage Level
Immaterial
OE
LOW-to-HIGH Transition
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
H or L
H or L
A-Bus to B-Bus
Bus to Register



X
X
X
X
X
X
Storage from
FIGURE 1.
FIGURE 3.
Inputs
1
CPBA
H or L
H or L



X
X
X
X
X
X
1
SAB
X
X
X
H
H
X
X
X
X
L
L
1
SBA
X
X
X
X
X
X
X
H
H
L
L
1
Data I/O (Note 1)
Output
A
Input
Input
0–7
2
Output
B
Input
Input
0–7
Isolation
Clock An Data into A Register
Clock Bn Data Into B Register
An to Bn—Real Time (Transparent Mode)
Clock An Data to A Register
A Register to Bn (Stored Mode)
Clock An Data into A Register and Output to Bn
Bn to An—Real Time (Transparent Mode)
Clock Bn Data into B Register
B Register to An (Stored Mode)
Clock Bn into B Register and Output to An
Real Time Transfer
B-Bus to A-Bus
Register to Bus
Output Operation Mode
Transfer from
FIGURE 2.
FIGURE 4.