N74F244N ,Octal buffers (3-State)features two output• 15mA source currentenables, OEa and OEb, each controlling four of the 3-State ..
N74F244N ,Octal buffers (3-State)features.• Reduced I (74F244B)CC• Reduced loading (74F244B I = 40μA)IL TYPICALTYPICAL SUPPLYTYPE PR ..
N74F245D ,Octal transceiver 3-StatePIN CONFIGURATION• Octal bidirectional bus interface1 20 VT/RCC• 3-State buffer outputs sink 64mA2 ..
N74F245N ,Octal transceiver 3-Statefeatures an Output Enable (OE) input for easy cascading andTransmit/Receive (T/R) input for directi ..
N74F253D ,Dual 4-bit input multiplexer (3-State)PIN CONFIGURATION• 3-State outputs for bus interface and multiplex expansionOEa 1 16 VCC• Common se ..
N74F253D ,Dual 4-bit input multiplexer (3-State)PIN CONFIGURATION• 3-State outputs for bus interface and multiplex expansionOEa 1 16 VCC• Common se ..
NFC20-24S05 , Single and dual output 20 Watt Wide input DC/DC converters
NFC20-48S05 , Single and dual output 20 Watt Wide input DC/DC converters
NFC20-48S05 , Single and dual output 20 Watt Wide input DC/DC converters
NFC20-48S05 , Single and dual output 20 Watt Wide input DC/DC converters
NFC40-48S05-M , Single and triple output 40 Watt Wide input DC/DC converters
NFE31PT101C1E9L , Chip EMIFILr LC Combined Type
I74F244D-N74F244BD-N74F244D-N74F244DB-N74F244N
Octal buffers 3-State
Philips Semiconductors
Product specification 1994 Dec 05
IC15 Data Handbook
Philips Semiconductors Product specification
74F244/74F244BOctal buffers (3-State)
FEATURES Octal bus interface 3-State output buffer sink 64mA 15mA source current Guaranteed output skew less than 2.0ns (74F244B) Reduced ground bounce (74F244B) Reduced ICC (74F244B) Reduced loading (74F244B IIL = 40μA) Split lead frame offers increased noise immunity (74F244B) Industrial temperature range available (-40°C to +85°C) for
74F244 74F244 available in SSOP Type II package
DESCRIPTIONThe 74F244 is an octal buffer that is ideal for driving bus lines of
buffer memory address registers. The outputs are all capable of
sinking 64mA and sourcing up to 15mA, producing very good
capacitive drive characteristics. The device features two output
enables, OEa and OEb, each controlling four of the 3-State outputs.
The 74F244B is functionally equivalent to the 74F244. It has been
designed to reduce effects of ground noise. Other advantages are
noted in the features.
ORDERING INFORMATION
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
NOTE: One (1.0) FAST unit load is defined as: 20μA in the high state and 0.6mA in the low state.
PIN CONFIGURATION
LOGIC SYMBOL
Philips Semiconductors Product specification
74F244/74F244BOctal buffers (3-State)
IEC/IEEE SYMBOL
LOGIC DIAGRAM
FUNCTION TABLE
NOTES:= High voltage level= Low voltage level= Don’t care= High impedance ”off” state
Philips Semiconductors Product specification
74F244/74F244BOctal buffers (3-State)
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 theoperating free air temperature range.)
RECOMMENDED OPERATING CONDITIONS
Philips Semiconductors Product specification
74F244/74F244BOctal buffers (3-State)
DC ELECTRICAL CHARACTERISTICS(Over recommended operating free-air temperature range unless otherwise noted.)
NOTES: For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type. All typical values are at VCC = 5V, Tamb = 25°C. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, IOS tests should be performed last.
Philips Semiconductors Product specification
74F244/74F244BOctal buffers (3-State)
AC ELECTRICAL CHARACTERISTICS FOR 74F244
AC ELECTRICAL CHARACTERISTICS FOR 74F244B
NOTES: |tPN actual - tPM actual| for any output compared to any other output where N and M are either LH or HL. Skew times are valid only under same test conditions (temperature, VCC, loading, etc.,).
