Philips Semiconductors Advanced BiCMOS Products
Objective specification
Octal inverting transceiver with parity
generator/checker (3–State)
74ABT834
power dissipation with high speed and high
output drive.
sent to the input of a storage register. If a
Low–to–High transition happens at the clock
input (CP), the error data is stored in the
register and the Open–collector error flag
(ERROR) will go Low. The error flag register
is cleared with a Low pulse on the CLEAR
input.
FEATURES
• Low static and dynamic power dissipation
The 74ABT834 is an octal inverting
transceiver with a parity generator/checker
and is intended for bus–oriented applications.
with high speed and high output drive
• Open–collector ERROR output
• Output capability: +64mA/–32mA
When Output Enable A (OEA) is High, it will
place the A outputs in a high impedance
state. Output Enable B (OEB) controls the B
outputs in the same way.
• Latch–up protection exceeds 500mA per
If both OEA and OEB are Low, data will flow
from the A bus to the B bus and the part is
forced into an error condition which creates
an inverted PARITY output. This error
condition can be used by the designer for
system diagnostics.
Jedec JC40.2 Std 17
• ESD protection exceeds 2000 V per MIL
STD 883C Method 3015.6 and 200 V per
Machine Model
The parity generator creates an odd parity
output (PARITY) when OEB is Low. When
OEA is Low, the parity of the B port, including
the PARITY input, is checked for odd parity.
When an error is detected, the error data is
• Power up/down 3–State
DESCRIPTION
The 74ABT834 high–performance BiCMOS
device combines low static and dynamic
QUICK REFERENCE DATA
CONDITIONS
= 25°C; GND = 0V
SYMBOL
PARAMETER
TYPICAL
3.4
UNIT
ns
T
amb
t
t
Propagation delay
An to Bn or Bn to An
PLH
PHL
C = 50pF; V = 5V
L
CC
t
t
Propagation delay
An to PARITY
PLH
PHL
C = 50pF; V = 5V
7.4
ns
L
CC
C
Input capacitance
Output capacitance
Total supply current
V = 0V or V
CC
4
7
pF
pF
µA
IN
I
C
V = 0V or V
I CC
OUT
CCZ
I
Outputs disabled; V =5.5V
50
CC
ORDERING INFORMATION
CONDITIONS
= 25°C; GND = 0V
PACKAGES
ORDER CODE
T
amb
24–pin plastic DIP (300mil)
24–pin plastic SOL (300mil)
–40°C to +85°C
–40°C to +85°C
74ABT834N
74ABT834D
PIN CONFIGURATION
LOGIC SYMBOL
OEA
A0
1
2
3
4
5
24
23
22
21
20
V
CC
B0
B1
B2
B3
2
3
4
5
6
7
8
9
A1
A2
A0 A1 A2 A3 A4 A5 A6 A7
OEB
A3
14
1
6
7
8
9
19 B4
18 B5
A4
A5
15
10
PARITY
OEA
CLEAR
CP
11
13
ERROR
A6
A7
17
16
15
14
B6
B0 B1 B2 B3 B4 B5 B6 B7
B7
ERROR 10
CLEAR 11
GND 12
PARITY
OEB
23 22 21 20 19 18 17 16
13 CP
TOP VIEW
1
June 9, 1992