Philips Semiconductors
Product specification
16-bit registered transceiver (3-State)
74ABT16952
74ABTH16952
FEATURES
•
Two 8-bit registered transceivers
•
Live insertion/extraction permitted
•
Power-up 3-State
•
74ABTH16952 incorporates bus-hold data inputs which eliminate
the need for external pull-up resistors to hold unused inputs
DESCRIPTION
The 74ABT16952 high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed and high
output drive.
The 74ABT16952 is a dual octal registered transceiver. Two 8-bit
registers store data flowing in both directions between two
bidirectional buses. Data applied to the inputs is entered and stored
on the rising edge of the Clock (nCPXX) provided that the Clock
Enable (nCEXX) is Low. The data is then present at the 3-State
output buffers, but is only accessible when the Output Enable
(nOEXX) is Low. Data flow from A inputs to B outputs is the same as
for B inputs to A outputs.
Two options are available, 74ABT16952 which does not have the
bus-hold feature and 74ABTH16952 which incorporates the
bus-hold feature.
•
Power-up reset
•
Multiple V
CC
and GND pins minimize switching noise
•
Independent registers for A and B buses
•
Output capability: +64mA/–32mA
•
Latch-up protection exceeds 500mA per Jedec Std 17
•
ESD protection exceeds 2000V per MIL STD 883 Method 3015
•
Bus-hold data inputs eliminate the need for external pull-up
resistors to hold unused inputs
and 200V per Machine Model
QUICK REFERENCE DATA
SYMBOL
t
PLH
t
PHL
C
IN
C
I/O
I
CCZ
I
CCL
PARAMETER
Propagation delay
nCPBA to nAx or
nCPAB to nBx
Input capacitance
I/O capacitance
Quiescent su ly current
supply
CONDITIONS
T
amb
= 25°C; GND = 0V
C
L
= 50pF; V
CC
= 5V
V
I
= 0V or V
CC
V
O
= 0V or V
CC
; 3-State
Outputs disabled; V
CC
= 5.5V
Outputs LOW; V
CC
= 5.5V
TYPICAL
2.8
2.3
4
7
500
8
UNIT
ns
pF
pF
µA
mA
ORDERING INFORMATION
PACKAGES
56-Pin Plastic SSOP Type III
56-Pin Plastic TSSOP Type II
56-Pin Plastic SSOP Type III
56-Pin Plastic TSSOP Type II
TEMPERATURE RANGE
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
OUTSIDE NORTH AMERICA
74ABT16952 DL
74ABT16952 DGG
74ABTH16952 DL
74ABTH16952 DGG
NORTH AMERICA
BT16952 DL
BT16952 DGG
BH16952 DL
BH16952 DGG
DWG NUMBER
SOT371-1
SOT364-1
SOT371-1
SOT364-1
PIN DESCRIPTION
PIN NUMBER
2, 55
18, 22
3, 54,
26, 31
52, 51, 49, 48, 47, 45, 44, 43
42, 41, 40, 38, 37, 36, 34, 33
1, 56
8, 29
4, 11, 18, 25, 32, 39, 45, 53
4, 17, 30, 43
7, 22, 35, 50
SYMBOL
1CPAB / 1CPBA
2CPAB / 2CPBA
1CEAB / 1CEBA
2CEAB / 2CEBA
1A0 – 1A7
2A0 – 2A7
1B0 – 1B7
2B0 – 2B7
1OEAB / 1OEBA
2OEAB / 2OEBA
GND
V
CC
NAME AND FUNCTION
Clock input A to B / Clock input B to A
Clock enable input A to B / Clock enable input B to A
Data inputs/outputs (A side)
Data inputs/outputs (B side)
Output enable inputs
Ground (0V)
Positive supply voltage
1998 Feb 25
2
853-1814 19018
Real-time operating system RTOS
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