Philips Semiconductors
Product specification
74ABT573A
Octal D-type transparent latch (3-State)
The 74ABT573A 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 74ABT573A is functionally identical to the
74ABT373 but has a flow-through pinout configuration to facilitate
PC board layout and allow easy interface with microprocessors.
FEATURES
• 74ABT573A is flow-through pinout version of 74ABT373
• Inputs and outputs on opposite side of package allow easy
interface to microprocessors
• 3-State output buffers
• Common output enable
• Latch-up protection exceeds 500mA per JEDEC Std 17
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.
• ESD protection exceeds 2000 V per MIL STD 883 Method 3015
and 200 V per Machine Model
• Power-up 3-State
• Power-up reset
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.
DESCRIPTION
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.
The 74ABT573A high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed and high
output drive.
QUICK REFERENCE DATA
CONDITIONS
= 25°C; GND = 0V
SYMBOL
PARAMETER
TYPICAL
UNIT
T
amb
t
t
Propagation delay
Dn to Qn
2.8
3.3
PLH
PHL
C = 50pF; V = 5V
ns
L
CC
C
Input capacitance
Output capacitance
Total supply current
V = 0V or V
CC
3
6
pF
pF
µA
IN
I
C
Outputs disabled; V = 0V or V
O CC
OUT
CCZ
I
Outputs disabled; V =5.5V
100
CC
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE OUTSIDE NORTH AMERICA
NORTH AMERICA
74ABT573A N
DWG NUMBER
SOT146-1
20-Pin Plastic DIP
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
74ABT573A N
74ABT573A D
74ABT573A DB
74ABT573A PW
20-Pin plastic SO
74ABT573A D
SOT163-1
20-Pin Plastic SSOP Type II
20-Pin Plastic TSSOP Type I
74ABT573A DB
74ABT573APW DH
SOT339-1
SOT360-1
PIN CONFIGURATION
PIN DESCRIPTION
PIN
SYMBOL
NUMBER
FUNCTION
1
OE
Output enable input (active-Low)
Data inputs
OE
D0
1
2
3
4
5
20
19
18
17
16
V
2, 3, 4, 5,
6, 7, 8, 9
CC
D0-D7
Q0
19, 18, 17,
16, 15, 14,
13, 12
D1
Q1
Q2
Q3
Q4
Q5
Q6
Q7
E
Q0-Q7
Data outputs
D2
D3
11
10
20
E
Enable input (active-High)
Ground (0V)
D4
6
7
15
14
13
12
11
GND
D5
V
CC
Positive supply voltage
D6
8
D7
9
GND
10
SA00185
1
1995 Sep 06
853–1455 15703