Philips Semiconductors
Product specification
Transceivers
74F2952
74F2953
FEATURES
74F2952, 74F2953
Registered transceiver, non-inverting (3-State)
Registered transceiver, inverting (3-State)
DESCRIPTION
The 74F2952 and 74F2953 are 8-bit registered transceivers. Two
8-bit back-to-back registers store data flowing in both directions
between two bi-directional buses. Data applied to the inputs is
entered and stored on the rising edge of the Clock (CPXX) provided
that the Clock Enable (CEXX) is Low. The data is then present at
the 3-State output buffers, but is only accessible when the Output
Enable (OEXX) is Low. Data flow from ‘A’ inputs to ‘B’ outputs is the
same as for ‘B’ inputs to ‘A’ outputs.
TYPICAL
SUPPLY CURRENT
(TOTAL)
105mA
105mA
•
8-bit registered transceivers
•
Two 8-bit, back-to-back registers store data moving in both
directions between two bidirectional buses
•
Separate Clock, Clock Enable and 3-State Enable provided for
each register
•
74F2952 non-inverting
•
74F2953 inverting
•
AM2952/2953 functional equivalent
•
‘A’ outputs sink 24mA and source 3mA
•
‘B’ outputs sink 64mA and source 15mA
•
300 mil wide 24-pin Slim DIP package
ORDERING INFORMATION
DESCRIPTION
24-pin Plastic Slim DIP (300mil)
24-pin Plastic SOL
1
28-pin Plastic Leaded Chip Carrier
TYPE
74F2952
74F2953
TYPICAL f
MAX
160MHz
160MHz
COMMERCIAL RANGE
V
CC
= 5V
±10%,
T
amb
= 0°C to +70°C
N74F2952N, N74F2953N
N74F2952D, N74F2953D
N74F2952A, N74F2953A
PACKAGE
DRAWING
NUMBER
SOT222-1
SOT137-1
SOT261-2
NOTE:
1. Thermal mounting techniques are recommended. See
SMD Process Applications
for a discussion of thermal consideration for surface
mounted devices.
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
A0 – A7
B0 – B7
CPAB, CPBA
CEAB, CEBA
OEAB, OEBA
A0 – A7
B0 – B7
DESCRIPTION
Port A, 3-State inputs
Port B, 3-State inputs
Clock inputs
Clock Enable inputs
Output Enable inputs
Port A, 3-State outputs
Port B, 3-State outputs
74F(U.L.)
HIGH/LOW
3.5/1.0
3.5/1.0
1.0/1.0
1.0/1.0
1.0/1.0
150/40
750/106.7
LOAD VALUE
HIGH/LOW
70µA/0.6mA
70µA/0.6mA
20µA/0.6mA
20µA/0.6mA
20µA/0.6mA
3.0mA/24mA
15mA/64mA
NOTE:
One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
1989 Sep 22
2
853–1097 97708
Embedded System
京公网安备 11010802033920号
EEWORLD
