74ALS651-1D 查看數據表（PDF） - Philips Electronics
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74ALS651-1D Datasheet PDF : 13 Pages
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Philips Semiconductors
Product specification
Transceiver/register
74ALS651/74ALS651-1
74ALS652/74ALS652-1
74ALS651/651-1
74ALS652/652-1
Octal transceiver/register, inverting (3-State)
Octal transceiver/register, non-inverting (3-State)
FEATURES
• Independent registers for A and B buses
• Multiplexed real-time and stored data
• Choice of non-inverting and inverting data paths
• 3-State outputs
• The -1 versions sinks 48mA IOL within the ±5% VCC range
DESCRIPTION
The 74LAS651 and 74ALS652 transceivers/registers consist of bus
transceiver circuits with 3-State outputs, D-type flip-flops, and
control circuitry arranged for multiplexed transmission of data
directly from the input bus or the internal registers. Data on the A or
B bus will be clocked into the registers as the appropriate clock pin
goes High. Output enable (OEAB, OEBA) and select (SAB, SBA)
pins are provided for bus management. The 74LAS651-1 and
74ALS652-1 will sink 48mA if the VCC is limited to 5.0V ± 0.25V.
TYPE
74ALS651/74ALS651-1
74ALS652/74ALS652-1
TYPICAL
fMAX
140MHz
140MHz
TYPICAL
SUPPLY CURRENT
(TOTAL)
40mA
46mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
24-pin plastic DIP
74ALS651N, 74ALS651-1N,
74ALS652N, 74ALS652-1N
24-pin plastic SOL
74ALS651D, 74ALS651-1D,
74ALS652D, 74ALS652-1D
DRAWING
NUMBER
SOT222-1
SOT137-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
A0 – A7
A inputs
1.0/1.0
B0 – B7
B inputs
1.0/1.0
CPAB
A-to-B clock input
1.0/1.0
CPBA
B-to-A clock input
1.0/1.0
SAB
A-to-B select input
1.0/1.0
SBA
B-to-A select input
1.0/1.0
OEAB
A-to-B output enable input
1.0/1.0
OEBA
B-to-A output enable input
1.0/1.0
A0 – A7, B0 – B7
A, B outputs
750/240
A0 – A7, B0 – B7
A, B outputs (-1 version)
750/480
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOAD VALUE
HIGH/LOW
70µA/0.1mA
70µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
15mA/24mA
15mA/48mA
1991 Feb 08
2
853–1407 01670
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