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Details, datasheet, quote on part number:74F2245
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| Part: | 74F2245 |
| Category: | Logic => Bus Interface => Bus Oriented Circuits |
| Description: | Octal Transceiver With 30 Ohms Equivalent Output Termination (3-state) |
| Company: | Philips Semiconductors |
| Datasheet: | Download 74F2245 datasheet File size : 106 kB |
| Request For quote: | Find where to buy 74F2245
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Datasheet text preview:
INTEGRATED CIRCUITS
74F2245 Octal transceiver with 30W equivalent output termination (3-State)
Product specification IC15 Data Handbook 1996 May 10
Philips Semiconductors
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output termination (3-State)
74F2245
FEATURES
· Octal bidirectional bus interface · 30 Ohm output termination for driving DRAM · Outputs are placed in high impedance state during power-off
conditions
PIN CONFIGURATION
T/R 1 A0 A1 A2 A3 A4 2 3 4 5 6 7 8 9 20 VCC 19 OE 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7
· SSOP Type II package
DESCRIPTION
The 74F2245 is an octal transceiver featuring non-inverting 3-State bus compatible outputs in both transmit and receive directions. The device features an Output Enable (OE) input for easy cascading and Transmit/Receive (T/R) input for direction control. The 3-State outputs, B0-B7, have been designed to prevent output bus loading if the power is removed from the device. The 30 Ohm series termination on the outputs reduces over/undershoot making them ideal for driving DRAM. TYPE 74F2245 TYPICAL PROPAGATION DELAY 4.0ns
A5 A6 A7
GND 10
SF00198
TYPICAL SUPPLY CURRENT (TOTAL) 70mA
ORDERING INFORMATION
DESCRIPTION 20-Pin Plastic DIP 20-Pin Plastic SOL 20-Pin Plastic SSOP COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C N74F2245N N74F2245D N74F2245DB DRAWING NUMBER SOT146-1 SOT163-1 SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS A0-A7, B0-B7 OE T/R A0-A7 B0-B7 Data inputs Output Enable input (active Low) Transmit/Receive input A port outputs B port outputs DESCRIPTION 74F (U.L.) HIGH/LOW 3.5/1.0 1.0/2.0 1.0/2.0 150/8 150/8 LOAD VALUE HIGH/LOW 70µA/0.6mA 20µA/1.2mA 20µA/1.2mA 3.0mA/5mA* 3.0mA/5mA*
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state. * 12mA with reduced noise margin
1996 May 10
2
853-1833 16802
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output termination (3-State)
74F2245
LOGIC SYMBOL
2 3 4 5 6 7 8 9
IEC/IEEE SYMBOL
19 1 G3 3EN1 (BA) 3EN1 (AB)
1 A0 19 1 OE T/R B0 B1 B2 B3 B4 B5 B6 B7 A1 A2 A3 A4 A5 A6 A7 2 3 4 5 6 7 18 VCC = Pin 20 GND = Pin 10 17 16 15 14 13 12 11 8 9 2 18 17 16 15 14 13 12 11
SF00199
SF00200
LOGIC DIAGRAM
A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9
OE
19 1 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7
T/R VCC = Pin 20 GND = Pin 10
SF00201
FUNCTION TABLE
INPUTS OE L L H T/R L H X OUTPUTS Bus B data to Bus A Bus A data to Bus B Z
H = High voltage level L = Low voltage level X = Don't care Z = High impedance "off" state
1996 May 10
3
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output termination (3-State)
74F2245
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits 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 VCC VIN IIN VOUT IOUT Tamb Tstg Supply voltage Input voltage Input current Voltage applied to output in High output state A0-A7 Current applied to output in Low output state applied to output in Low output state Operating free-air temperature range Storage temperature range B0-B7 PARAMETER RATING 0.5 to +7.0 0.5 to +7.0 30 to +5 0.5 to +5.5 24 24 0 to +70 65 to +150 UNIT V V mA V mA mA °C °C
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL VCC VIH VIL IIK IOH Supply voltage High-level input voltage Low-level input voltage Input clamp current A0-A7 High-level output current output current B0-B7 A0-A7 IOL Tamb * Low-level output current output current Operating free-air temperature range B0-B7 0 PARAMETER MIN 4.5 2.0 0.8 18 3 3* 5* 5* +70 NOM 5.0 MAX 5.5 UNIT V V V mA mA mA mA mA °C
12 mA with reduced noise margin
1996 May 10
4
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output termination (3-State)
74F2245
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER TEST CONDITIONS2 CONDITIONS ±10% VCC ±5% VCC ±10% VCC ±5% VCC ±10% VCC ±5% VCC ±10% VCC ±5% VCC LIMITS MIN 2.4 2.7 2.0 2.0 0.42 0.42 0.55 0.55 0.73 0.50 0.50 0.67 0.67 1.2 100 1 20 1.2 70 600 60 VCC = MAX MAX 60 60 VCC = MAX 70 75 150 150 87 100 110 V µA mA µA mA µA µA mA mA mA mA mA 3.4 TYP1 MAX UNIT V V V V V V V
A0-A7, B0-B7 B0 B7 VOH High-level output voltage output voltage A0-A7, B0-B7 B0 B7
VCC = MIN, VIL = MAX MAX, VIH = MIN
IOH = 3mA 3mA
IOH = 12mA 12mA IOL = 5mA
A0-A7, B0-B7 B0 B7 VOL Low-level output voltage output voltage A0-A7, B0-B7 B0 B7 VIK II IIH IIL IIH+IOZH IIL+IOZL IOS Input clamp voltage Input current at maximum input voltage High-level input current Low-level input current Off-state output current High level voltage applied Off-state output current Low level voltage applied Short-circuit output current3 output current A0-A7 B0-B7 ICCH ICC Supply current (total) ICCL ICCZ OE, T/R A0-A7, B0-B7 OE, T/R only OE, T/R only
VCC = MIN, VIL = MAX MAX, VIH = MIN
IOL = 5mA IOL = 12mA 12mA
VCC = MIN, II = IIK VCC = 5.5V, VI = 7.0V VCC = 5.5V, VI = 5.5V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.5V VCC = MAX, VO = 2.7V VCC = MAX, VO = 0.5V
NOTES: 1 For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type. 2 All typical values are at VCC = 5V, Tamb = 25°C. 3 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.
AC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITION VCC = +5.0V Tamb = +25°C CL = 50pF, RL = 500 MIN tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay An to Bn, Bn to An Output Enable time to High or Low level Output Disable time from High or Low level Waveform 1 Waveform 2 Waveform 3 Waveform 2 Waveform 3 2.5 2.5 2.5 3.5 2.5 1.5 TYP 3.5 4.0 4.5 5.5 5.0 3.5 MAX 7.0 7.0 8.0 8.5 7.0 6.5 VCC = +5.0V ± 10% Tamb = 0°C to +70°C CL = 50pF, RL = 500 MIN 2.5 2.5 2.0 3.5 2.0 1.0 MAX 8.5 8.0 9.5 9.5 7.5 7.0 ns ns ns UNIT
1996 May 10
5
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