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74F543 View Datasheet(PDF) - Philips Electronics

Part Name
Description
View to exact match
74F543
Philips
Philips Electronics Philips
74F543 Datasheet PDF : 16 Pages
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Philips Semiconductors
Octal registered transceivers
Product specification
74F543, 74F544
74F543
74F544
Octal registered transceiver, non-inverting (3-State)
Octal registered transceiver, inverting 93-State)
FEATURES
Combines74F245 and 74F373 type functions in one chip
8-bit octal transceiver with D-type latch
74F543 Non-inverting
74F544 Inverting
Back-to-back registers for storage
Separate controls for data flow in each direction
A outputs sink 20mA and source 3mA
B outputs sink 64mA and source 15mA
3-State outputs for bus-oriented applications
74F543 available in SSOP Type II package
DESCRIPTION
The 74F543 and 74F544 Octal Registered Transceivers contain two
sets of D-type latches for temporary storage of data flowing in either
direction. Separate Latch Enable (LEAB, LEBA) and Output Enable
(OEAB, OEBA) inputs are provided for each register to permit
independent control of inputting and outputting in either direction of
data flow. While the 74F543 has non-inverting data path, the 74F544
inverts data in both directions. The A outputs are guaranteed to sink
24mA, while the B outputs are rated for 64mA.
FUNCTIONAL DESCRIPTION
The 74F543 and 74F544 contain two sets of eight D-type latches,
with separate input and controls for each set. For data flow from A to
B, for example, the A-to-B Enable (EAB) input must be Low in order
to enter data from A0 - A7 or take data from B0 - B7, as indicated in
the Function Table. With EAB Low, a Low signal on the A-to-B Latch
Enable (LEAB) input makes the A-to-B latches transparent; a
subsequent Low-to-High transition for the LEAB signal puts the
A latches in the storage mode and their outputs no longer change
with the A inputs. With EAB and OEAB both Low, the 3-State
B output buffers are active and display the data present at the
outputs of the A latches. Control of data flow from B to A is similar,
but using the EBA, LEBA, and OEBA inputs.
TYPE
74F543
74F544
TYPICAL
PROPAGATION
DELAY
6.0ns
6.5ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
80mA
95mA
ORDERING INFORMATION
DESCRIPTION
24-pin plastic skinny DIP (300mil)
24-pin plastic SOL
24-pin plastic SSOP Type II
COMMERCIAL RANGE
VCC = 5V ±10%,
TA = 0°C to +70°C
N74F543N,
N74F544N
N74F543D,
N74F544D
74F543DB
DRAWING
NUMBER
SOT222–1
SOT137-1
SOT340-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
A0 - A7
Port A, 3-State inputs
B0 - B7
Port B, 3-State inputs
OEAB
A-to-B Output Enable input (Active Low)
74F543
74F544
OEBA
EAB
B-to-A Output Enable input (Active Low)
A-to-B Enable input (Active Low)
EBA
B-to-A Enable input (Active Low)
LEAB
A-to-B Latch Enable input (Active Low)
LEBA
B-to-A Latch Enable input (Active Low)
74F543
A0 - A7
B0 - B7
Port A, 3-State outputs
Port B, 3-State outputs
74F544
A0 - A7
B0 - B7
Port A, 3-State outputs
Port B, 3-State outputs
NOTE: One (1.0) FAST Unit Load is defined as: 20µA in the High State and 0.6mA in the Low state.
74F(U.L.)
HIGH/LOW
3.5/1.0
3.5/1.0
1.0/1.0
1.0/1.0
1.0/2.0
1.0/2.0
1.0/1.0
1.0/1.0
150/40
750/106.7
150/40
750/106.7
1994 Dec 5
2
LOAD VALUE
HIGH/LOW
70µA/0.6mA
70µA/0.6mA
20µA/0.6mA
20µA/0.6mA
20µA/1.2mA
20µA/1.2mA
20µA/0.6mA
20µA/0.6mA
3.0mA/24mA
15mA/64mA
3.0mA/24mA
15mA/64mA
853-0874 14379
 

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