Philips Semiconductors Product specification
74ABT373AOctal transparent latch (3-State)
2
1995 Feb 17 853-1454 14852
FEATURES
• 8-bit transparent latch
• 3-State output buffers
• Output capability: +64mA/–32mA
• Latch-up protection exceeds 500mA per JEDEC Std 17
• ESD protection exceeds 2000 V per MIL STD 883 Method 3015
and 200 V per Machine Model
• Power-up 3-State
• Power-up reset
• Live insertion/extraction permitted
DESCRIPTION
The 74ABT373A high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed and high
output drive.
The 74ABT373A device is an octal transparent latch coupled to
eight 3-State output buffers. The two sections of the device are
controlled independently by Enable (E) and Output Enable (OE
)
control gates.
The data on the D inputs are transferred to the latch outputs when
the Latch Enable (E) input is High. The latch remains transparent to
the data inputs while E is High, and stores the data that is present
one setup time before the High-to-Low enable transition.
The 3-State output buffers are designed to drive heavily loaded
3-State buses, MOS memories, or MOS microprocessors. The
active-Low Output Enable (OE
) controls all eight 3-State buffers
independent of the latch operation.
When OE
is Low, the latched or transparent data appears at the
outputs. When OE
is High, the outputs are in the High-impedance
“OFF” state, which means they will neither drive nor load the bus.
QUICK REFERENCE DATA
SYMBOL PARAMETER
CONDITIONS
T
amb
= 25°C; GND = 0V
TYPICAL UNIT
t
PLH
t
PHL
Propagation delay
Dn to Qn
C
L
= 50pF; V
CC
= 5V
3.2
3.6
ns
C
IN
Input capacitance V
I
= 0V or V
CC
4 pF
C
OUT
Output capacitance Outputs disabled; V
O
= 0V or V
CC
7 pF
I
CCZ
Total supply current Outputs disabled; V
CC
=5.5V 100 µA
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER
20-Pin Plastic DIP –40°C to +85°C 74ABT373A N 74ABT373A N SOT146-1
20-Pin plastic SO –40°C to +85°C 74ABT373A D 74ABT373A D SOT163-1
20-Pin Plastic SSOP Type II –40°C to +85°C 74ABT373A DB 74ABTD373A B SOT339-1
20-Pin Plastic TSSOP Type I –40°C to +85°C 74ABT373A PW 7ABT373APW DH SOT360-1
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
OE
Q0
D0
D1
Q1
Q2
D2
D3
Q3 Q4
GND
D4
D5
Q5
Q6
D6
D7
Q7
V
CC
E
SA00059
PIN DESCRIPTION
PIN NUMBER SYMBOL FUNCTION
1 OE Output enable input (active-Low)
3, 4, 7, 8, 13,
14, 17, 18
D0-D7 Data inputs
2, 5, 6, 9, 12,
15, 16, 19
Q0-Q7 Data outputs
11 E Enable input (active-High)
10 GND Ground (0V)
20 V
CC
Positive supply voltage
