74ABT16952CSSC

© 2001 Fairchild Semiconductor Corporation DS011647 www.fairchildsemi.com
November 1993
Revised August 2001
74ABT16952 16-Bit Registered Transceiver with 3-STATE Outputs
74ABT16952
16-Bit Registered Transceiver with 3-STATE Outputs
General Description
The ABT16952 is a 16-bit registered transceiver. Two 8-bit
back to back registers store data flowing in both directions
between two bidirectional buses. Separate clock, clock
enable and 3-STATE output enable signals are provided for
each register. The output pins are guaranteed to source
32 mA and to sink 64 mA.
Features
Separate clock, clock enable and 3-STATE output
enable provided for each register
A and B output sink capability of 64 mA source capability
of 32 mA
Guaranteed latchup protection
High impedance glitch free bus loading during entire
power up and power down cycle
Nondestructive hot insertion capability
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the letter suffix “X” to the ordering code.
Pin Descriptions
Output Control
Register Function Table
(Applies to A or B Register)
H = HIGH Voltage Level Z = HIGH Impedance
L = LOW Voltage Level
= LOW-to-HIGH Transition
X = Immaterial NC = No Change
Connection Diagram
Order Number Package Number Package Description
74ABT16952CSSC MS56A 56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300" Wide
74ABT16952CMTD MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Pin Names Description
A
0
A
15
Data Register A Inputs/
B-Register 3-STATE Outputs
B
0
B
15
Data Register B Inputs/
A-Register 3-STATE Outputs
CPAB
n
, CPBA
n
Clock Pulse Inputs
CEA
n
, CEB
n
Clock Enable
OEAB
n
, OEBA
n
Output Enable Inputs
OE
Internal
Q
Output Function
H X Z Disable Outputs
L L L Enable Outputs
LH H
Inputs Internal
Function
DCPCE
Q
X X H NC Hold Data
L L L Load Data
H
L H
www.fairchildsemi.com 2
74ABT16952
Block Diagram
n for either byte 1 or byte 2
3 www.fairchildsemi.com
74ABT16952
Absolute Maximum Ratings(Note 1) Recommended Operating
Conditions
Note 1: Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Note 3: For 8-bit toggling, I
CCD
<1.4 mA/MHz.
Note 4: Guaranteed, but not tested.
Storage Temperature 65°C to +150°C
Ambient Temperature under Bias
55°C to +125°C
Junction Temperature under Bias
55°C to +150°C
V
CC
Pin Potential to Ground Pin 0.5V to +7.0V
Input Voltage (Note 2)
0.5V to +7.0V
Input Current (Note 2)
30 mA to +5.0 mA
Voltage Applied to Any Output
in the Disable or Power-Off State
0.5V to +5.5V
in the HIGH State
0.5V to V
CC
Current Applied to Output
in LOW State (Max) twice the rated I
OL
(mA)
DC Latchup Source Current
500 mA
Over Voltage Latchup (I/O) 10V
Free Air Ambient Temperature
40°C to +85°C
Supply Voltage
+4.5V to +5.5V
Minimum Input Edge Rate (
V/t)
Data Input 50 mV/ns
Enable Input 20 mV/ns
Clock Input 100 mV/ns
Symbol Parameter Min Typ Max Units
V
CC
Conditions
V
IH
Input HIGH Voltage 2.0 V Recognized HIGH Signal
V
IL
Input LOW Voltage 0.8 V Recognized LOW Signal
V
CD
Input Clamp Diode Voltage 1.2 V Min I
IN
= 18 mA (Non I/O Pins)
V
OH
Output HIGH Voltage 2.5
VMin
I
OH
= 3 mA (A
n
, B
n
)
2.0 I
OH
= 32 mA (A
n
, B
n
)
V
OL
Output LOW Voltage 0.55 V Min I
OL
= 64 mA (A
n
, B
n
)
V
ID
Input Leakage Test
4.75 V 0.0
I
ID
= 1.9 µA (Non-I/O Pins)
All Other Pins Grounded
I
IH
Input HIGH Current 1
µA Max
V
IN
= 2.7V (Non-I/O Pins) (Note 4)
1V
IN
= V
CC
(Non-I/O Pins)
I
BVI
Input HIGH Current Breakdown Test 7 µA MaxV
IN
= 7.0V (Non-I/O Pins)
I
BVIT
Input HIGH Current Breakdown Test (I/O) 100 µA MaxV
IN
= 5.5V (A
n
, B
n
)
I
IL
Input LOW Current 1
µA Max
V
IN
= 0.5V (Non-I/O Pins) (Note 4)
1V
IN
= 0.0V (Non-I/O Pins)
I
IH
+ I
OZH
Output Leakage Current 10 µA 0V5.5V V
OUT
= 2.7V (A
n
, B
n
);
OEA
or OEB = 2.0V
I
IL
+ I
OZL
Output Leakage Current 10 µA 0V5.5V V
OUT
= 0.5V (A
n
, B
n
);
OEA
or OEB = 2.0V
I
OS
Output Short-Circuit Current 100 275 mA Max V
OUT
= 0V (A
n
, B
n
)
I
CEX
Output HIGH Leakage Current 50 µA MaxV
OUT
= V
CC
(A
n
, B
n
)
I
ZZ
Bus Drainage Test 100 µA 0.0V V
OUT
= 5.5V (A
n
, B
n
);
All Others GND
I
CCH
Power Supply Current 1.0 mA Max All Outputs HIGH
I
CCL
Power Supply Current 60 mA Max All Outputs LOW
I
CCZ
Power Supply Current 1.0 mA Max Outputs 3-STATE;
All Others GND
I
CCT
Additional I
CC
/Input 2.5 mA Max V
I
= V
CC
2.1V; All Others
at V
CC
or GND
I
CCD
Dynamic I
CC
No Load mA/
Max
Outputs OPEN
(Note 4) 0.18 MHz OEA or OEB = GND,
Non-I/O = GND or V
CC
One Bit toggling, 50% duty cycle
(Note 3)

74ABT16952CSSC

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
IC TXRX NON-INVERT 5.5V 56SSOP
Lifecycle:
New from this manufacturer.
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