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MC54/74F399 QUAD 2-PORT REGISTER
The MC54/74F399 is the logical equivalent of a quad 2-input multiplexer feeding into four edge-triggered flip flops. A common Select input determines which of the two 4-bit words is accepted. The selected data enters the flipflops on the rising edge of the clock. The MC54/74F399 is the 16-pin version of the MC54/74F398, with only the Q outputs of the flip-flops available.
QUAD 2-PORT REGISTER
FASTTM SCHOTTKY TTL
* Select Inputs from Two Data Sources * Fully Positive Edge-Triggered Operation
CONNECTION DIAGRAM (TOP VIEW)
VCC 16 Qd 15 I0d 14 I1d 13 I1c 12 I0c 11 Qc 10 CP 9
J SUFFIX CERAMIC CASE 620-09
16 1
1 S
2 Qa
3 I0a
4 I1a
5 I1b
6 I0b
7 Qb
8 GND
16 1
N SUFFIX PLASTIC CASE 648-08
LOGIC DIAGRAM
I0a S I1a D CP Qa
16 1
D SUFFIX SOIC CASE 751B-03
ORDERING INFORMATION
MC54FXXXJ MC74FXXXN MC74FXXXD Ceramic Plastic SOIC
I0b D I1b CP Qb
LOGIC SYMBOL
I0c D I1c CP 1 D I1d CP 2 CP
NOTE: This diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Qc 3 4 6 5 11 12 14 13
I0d Qd
S CP
I0a I1a I0b I1b I0c I1c I0d I1d
9
Qa
Qb 7
Qc 10
Qd 15
VCC = PIN 16 GND = PIN 8
FAST AND LS TTL DATA 4-192
MC54/74F399
FUNCTIONAL DESCRIPTION The MC54/74F398 is a high-speed quad 2-port register. It will select four bits of data from either of two sources (Ports) under control of a common Select input (S). The selected data is transferred to a 4-bit output register synchronous with the LOW-to-HIGH transition of the Clock input (CP). The 4-bit DFUNCTION TABLE
Inputs S I I h h I0 I h X X I1 X X I h Output Q L H L H
type output register is fully edge-triggered. The Data inputs (I0x, I1x) and Select input (S) must be stable only a setup time prior to and hold time after the LOW-to-HIGH transition of the Clock input for predictable operation.
H = HIGH Voltage Level L = LOW Voltage Level h = HIGH Voltage Level one setup time prior to the LOW-to-HIGH clock transition I = LOW Voltage Level one setup time prior to the LOW-to-HIGH clock transition X = Don't Care
GUARANTEED OPERATING RANGES
Symbol VCC TA Supply Voltage Operating Ambient Temperature Range Parameter 54, 74 54 74 IOH IOL Output Current High Output Current Low 54, 74 54, 74 Min 4.5 -55 0 Typ 5.0 25 25 Max 5.5 125 70 - 1.0 20 mA mA Unit V C
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol VIH VIL VIK VOH Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage 54, 74 74 VOL IIH Output LOW Voltage Input HIGH Current 2.5 2.7 3.4 3.4 0.35 0.5 20 100 IIL IOS ICC Input LOW Current Output Short Circuit Current (Note 2) Power Supply Current -60 22 -0.6 -150 34 Min 2.0 0.8 -1.2 Typ Max Unit V V V V V V A A mA mA mA Test Conditions Guaranteed Input HIGH Voltage Guaranteed Input LOW Voltage IIN = -18 mA IOH = - 1.0 mA IOH = - 1.0 mA IOL = 20 mA VIN = 2.7 V VIN = 7.0 V VIN = 0.5 V VOUT = 0 V VCC = MAX VCC = MAX VCC = MAX VIN = GND CP = VCC = MIN VCC = 4.5 V VCC = 4.75 V VCC = MIN VCC = MAX
NOTES: 1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating ranges. 2. Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA 4-193
MC54/74F399
AC CHARACTERISTICS
54/74F TA = + 25C VCC = +5.0V CL = 50 pF Symbol fmax tPLH tPHL Parameter Maximum Clock Frequency Propagation Delay CP to Q Min 100 3.0 3.0 Typ 140 5.7 6.8 7.5 9.5 Max 54F TA = -55C to +125C VCC = 5.0 V 10% CL = 50 pF Min 80 3.0 3.0 9.5 11.5 Max 74F TA = 0C to 70C VCC = 5.0 V 10% CL = 50 pF Min 100 3.0 3.0 8.5 10.0 Max Unit MHz ns
AC OPERATING REQUIREMENTS
54/74F TA = +25C VCC = +5.0V Symbol ts(H) ts(L) th(H) th(L) ts(H) ts(L) th(H) th(L) tw(H) tw(L) Parameter Setup Time, HIGH or LOW In to CP Hold Time, HIGH or LOW In to CP Setup Time, HIGH or LOW S to CP Hold Time, HIGH or LOW S to CP CP Pulse Width HIGH or LOW Min 3.0 3.0 1.0 1.0 7.5 7.5 0 0 4.0 5.0 Typ Max 54F TA = -55C to + 125C VCC = 5.0 V 10% Min 4.5 4.5 1.5 1.5 9.5 9.5 0 0 4.0 7.0 Max 74F TA = 0C to 70C VCC = 5.0 V 10% Min 3.0 3.0 1.0 1.0 8.5 8.5 0 0 4.0 5.0 ns ns ns ns Max Unit ns
FAST AND LS TTL DATA 4-194

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