74F646 Datasheet, PDF (5/16 Pages) NXP Semiconductors – Octal transceiver/register, non-inverting 3-State

Philips Semiconductors
Transceivers/registers
Product specification
74F646/A/74F648/A
FUNCTION TABLE
INPUTS
OE DIR CPAB CPBA SAB SBA
DATA I/O
An
Bn
OPERATING MODE
74F646/74F646A
74F648/74F648A
X
X
↑
X
X
X
Input
Unspecified* Store A, B unspecified*
Store A, B unspecified*
X
X
X
↑
X
X Unspecified*
Input
Store B, A unspecified*
Store B, A unspecified*
H
X
↑
↑
X
X
Input
Input
Store A and B data
Store A and B data
H
X H or L H or L X
X
Input
Input
Isolation, hold storage
Isolation, hold storage
L
L
X
X
X
L
Output
Input
Real time B data to A bus Real time B data to A bus
L
L
X H or L X
H
Output
Input
Stored B data to A bus
Stored B data to A bus
L
H
X
X
L
X
Input
Output
Real time A data to B bus Real time A data to B bus
L
H H or L X
H
X
Input
Output
Stored A data to B bus
Stored A data to B bus
NOTES:
1. H = High–voltage level
2. L = Low–voltage level
3. X = Don’t care
4. ↑ = Low–to–high clock transition
5. * = The data output function may be enabled or disabled by various signals at the OE and DIR inputs. Data input functions are
always enabled, i.e., data at the bus pins will be stored on every low–to–high transition of the clock.
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the
operating free air temperature range.)
SYMBOL
PARAMETER
RATING
UNIT
V_CC
V_IN
I_IN
V_OUT
Supply voltage
Input voltage
Input current
Voltage applied to output in high output state
–0.5 to +7.0
V
–0.5 to +7.0
V
–30 to +5
mA
–0.5 to V_CC
V
I_OUT
Current applied to output in low output state
74F646A, 74F648A
72
mA
74F646, 74F648
128
mA
T_amb
T_stg
Operating free air temperature range
Storage temperature range
0 to +70
°C
–65 to +150
°C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
V_CC
Supply voltage
V_IH
High–level input voltage
V_IL
Low–level input voltage
I_Ik
Input clamp current
I_OH
High–level output current
I_OL
Low–level output current
T_amb
Operating free air temperature range
MIN
4.5
2.0
74F646A, 74F648A
74F646, 74F648
0
LIMITS
NOM
5.0
MAX
5.5
0.8
–18
–15
48
64
+70
UNIT
V
V
V
mA
mA
mA
mA
°C
1990 Sep 25
5